Answer:
La pata de un pato y la aleta de un pez son en ambos casos son elementos que les permiten tanto al pato como al pez moverse, además de sus funciones de estabilidad. La aleta de una ballena y el brazo del ser humano, sucede lo mismo que en el caso anterior. En el caso de la aleta de la ballena, es como la aleta del pez. En cuanto al brazo del ser humano permite realizar movimientos que contribuyen al desarrollo de sus funciones, como por ejemplo, agarrar distintos elementos. La pelvis reducida de los cetáceos no tiene actualmente ninguna función.
Explanation:
La pata de un pato es una extremidad que por su estructura le permita nadar perfectamente. En cuanto a la aleta de los peces y ballenas, es una parte de estos animales formada por tejido conjuntivo. Pueden tener distintos tamaños y su principal función no sólo es permitir el movimiento sino también la estabilidad. En cuanto a la pelvis reducida de los cetáceos era algo que tenía sentido en especies de antaño. Durante la evolución, su utilidad de fue perdiendo, como podría mencionarse el ejemplo en los humanos de las muelas de juicio.
Las estructuras mencionadas pertenecen a los sistemas locomotores de animales acuáticos y mamíferos terrestres.
Explanation:La pata de un pato y la aleta de un pez pertenecen al sistema locomotor de animales acuáticos. Estas estructuras se utilizan para moverse en el agua.
La aleta de una ballena también forma parte del sistema locomotor de animales acuáticos. Permite a la ballena nadar y desplazarse en el agua.
El brazo del ser humano pertenece al sistema locomotor de los mamíferos terrestres. Se utiliza para realizar movimientos y tareas.
La pelvis reducida de los cetáceos es un vestigio evolutivo que indica su pasado terrestre. Aunque ahora vivan en el agua, los cetáceos descienden de mamíferos terrestres y su estructura pélvica es un remanente de ese pasado.
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Which of the following cannot be given to children under seven due to damage to their teeth?
A
Quinolones
B
Beta-lactams
C
Aminoflycosides
D
Sulfonamides
E
Tetracyclines
Answer:
The answer is C
Explanation: s
Which procedure took the DNA from one sheep to produce a genetically identical lamb, named Dolly
Answer:Cloning
Explanation:
Answer:
cloning
Explanation:
What do birds need in order to maintain their body temperature?
Food they eat for storing carbohydrates
Plenty of food and water
Food they eat for energy
Carbohydrates and water
PLEASE QUICK MY QUIZ IS TIMEF
The correct answer is: Carbohydrates and water.
Birds, like all endothermic animals, need to maintain their body temperature through metabolic processes. Carbohydrates are a primary source of energy that birds derive from their food, which helps them generate heat through metabolism. Water is also crucial as it is involved in all metabolic reactions and helps to regulate body temperature. Food provides the necessary carbohydrates for energy, and birds also require plenty of water to support metabolism and prevent dehydration, which is essential for thermoregulation. Therefore, the combination of carbohydrates from food and water is what birds need to maintain their body temperature."
A rare genetic disease which is due to a recessive allele (a) and that is lethal when homozygous, occurs within a specific population at a frequency of one in a hundred thousand. In other words, one out of a hundred thousand individuals are homozygous recessive with the disease. How many individuals in a town with a population of 20,000 can be expected to carry this allele?
Answer:
40 individuals
Explanation:
The homozygous recessive percentage is equal to q2.
Recessive genotype frequency, q 2 is 1/1000000 = 0.000001
therefore, q = [tex]\sqrt{q2}[/tex] = [tex]\sqrt{0.000001 }[/tex] = 0.001 = allele "a" frequency
and p + q = 1, thus, p = 1 – q = 1 – 0.001 = 0.999
thus, the frequency of allele a = q = 0.001 and the frequency of allele A = p = 0.999
Carriers are heterozygous and are equal to 2pq.
So, 2pq = 2 x 0.999 x 0.001 x 20,000 = 39.96 (round of to 40)
Hence, 40 individuals will be expected to carry the recessive allele.
Some autoimmune diseases show a positive correlation with dramatically decreased expression of histone deacetylase (HDAC9, an enzyme that removes acetyl groups from histones). Why would the decreased expression of HDAC9 cause immune cells to produce inflammatory genes at inappropriate times?
Answer:
The positive charge of the histone proteins get reduced due to the process of histone acetylation, thus making the wrapping of DNA around the histones less tightened. The loose connected DNA afterward associates with the transcription factors for the articulation of the genes situated in that area.
Generally, when there is no requirement of gene anymore, the acetyl groups from the histones get withdrawn by the activity of histone deacetylase enzyme (HDAC9) that makes the DNA tightly wrapped and inaccessible again. In case, when less expression of histone deacetylase enzyme occurs, the process of deacetylation fails to take place. This indicates that within an immune cell, at the time of infection, the inflammatory gene, which was made available does not get re-wrapped firmly around the histones.
Which of the following is a monomer of DNA?
A) Protein
B) Oil
C) Nucleotides
Answer:
C) Nucleotides
Explanation:
Nucleotides are the monomers, or building blocks, of DNA. Therefore, option (C) is correct.
What are nucleotides?They are composed of three main components: a sugar molecule (deoxyribose in the case of DNA), a phosphate group, and a nitrogenous base (adenine, thymine, cytosine, or guanine). These nucleotides join together through phosphodiester bonds to form a long chain, resulting in the formation of the DNA molecule.
Each nucleotide in the DNA chain pairs with a complementary nucleotide from the opposing DNA strand through hydrogen bonding, creating the double helix structure of DNA. Therefore, nucleotides are the fundamental units that make up the structure of DNA and carry the genetic information in living organisms.
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Which activity has had the most negative effect on the environment
Explanation:
The leakage of oil in oil carrying ships and the effect of atomic blust in oceans are affecting equally and have the most negative effect on the environment of oceans.
Final answer:
Industrial activities, energy production, and resource exploitation are key human activities causing substantial environmental harm. Pollution, habitat destruction, and unsustainable consumption patterns contribute significantly to environmental degradation. Efforts to mitigate these effects conflict with economic interests that benefit a few at the expense of wider societal and environmental health.
Explanation:
Among the myriad of human activities, industrial activities, energy production, and resource exploitation have been identified as having particularly severe impacts on the environment. Industrial activities release various pollutants into the atmosphere, such as carbon dioxide, hydrocarbons, and nitrogen oxides, which contribute to greenhouse warming, ozone depletion, and smog formation. The excessive use of water in industry can lead to both pollution and thermal pollution.
Energy production and exploitation of resources like oil, gas, and minerals often involve environmentally damaging processes. Events like oil spills, mining operations, and deforestation lead to habitat destruction, water contamination, and soil erosion. Issues such as air and water pollution, and the resultant health effects, are exacerbated by energy production including coal mining, oil refining, and natural gas combustion.
In addition to these tangible impacts, the perpetuation of unsustainable consumption patterns and the externalization of environmental costs underline the ongoing challenge of addressing environmental degradation. Despite the negative effects being well known, progress towards more sustainable practices is often hindered by the economic benefits that accrue to a small number while the broader society bears the environmental and health costs.
Large areas of land are being developed. In the process thousands of trees are being removed and burned. How would this affect the cycle?
Answer:
The whole cycle is disturbed due to unwise cutting of trees.
Explanation:
Trees are the lungs of the planet earth which helps in cleaning the environment and provide habitat to millions of organisms. Trees absorb carbon-dioxide which is responsible for pollution and global warming and releasing oxygen which is necessary for the survival of living organisms. If these trees are removed, the habitat of many living organism will be destroyed and also increase occurs in the pollution and global warming of the earth atmosphere.
Answer: Trees are producers they use photosynthesis to create energy for food chains.
Explanation: Food chains are an exchange of energy that starts with producers and in this case the trees. Without the trees, there wouldn't be any food and the cycle would collapse.
Which of the following correctly describes an interaction that occurs between two body systems of a rabbit that helps the rabbit outrun a pursuing coyote?
Your answer:
A. The skeletal system releases additional calcium, and the circulatory system retains more sodium in the blood to provide muscles with ions for contraction.
B. The digestive system increases the rate of digestion, and the excretory system ceases to provide tissues with more nutrients
C. The respiratory system increases the breathing rate, and the circulatory system increases blood pressure to provide tissues with more oxygen.
D. The endocrine system releases hormones that prepare the immune system to deal with possible injuries
Answer: C. The respiratory system increases the breathing rate, and the circulatory system increases blood pressure to provide tissues with more oxygen.
Explanation:
Oxygen is a key component in respiration which supplies the body with energy. To be more precise, oxygen is needed for Aerobic Respiration which is the process by which the body turns fats and sugars into fuel using oxygen.
This fuel/energy is then used by cells to engage in activity.
When the Rabbit tries to outrun the coyote, the Respiratory System increases the breathing rate to allow more oxygen in. This oxygen is supplied to cells by blood so the Circulatory system uses the oxygen to increase blood pressure to get blood moving faster so that it can get more oxygen to the cells to enable them produce more energy needed to outrun the Coyote.
The vertebrates are highly organized organisms, which have developed circulatory, respiratory, neural, and excretory systems.
The rabbit can outrun a coyote due to an increase in the breathing rate and blood pressure by the circulatory system.
Functions of the respiratory and circulatory system are:
The respiratory system is a dense network of organs and tissues, which help organisms breathe. The respiratory center is in the brain, where the basic rhythm of breathing is set. The circulatory system is involved in the circulation of blood, gases, and nutrients throughout the body. The cardiovascular center receives the changes in pH and stretch, which alter the heart rate and stroke volume to increase the blood pressure.
Thus, the correct answer is Option C.
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A botanist is conducting a two-factor experiment on seed germination. One factor is temperature, with two levels: cold storage and ambient temperature storage. The other factor is gibberelin treatment, which occurs at four different concentrations. Our botanist attempts this experiment on the cheap, with only one seed per treatment group (hey, maybe it's a coconut). If the ANOVA includes a test for the two-way interaction, how many degrees of freedom will our hero have for error? 3 0 4 7 1
Answer:
67Explanation:
In a two-factor experiment with two levels of one factor and four levels of another factor, where each combination of factors is represented by one observation (as is the case with the botanist's seed germination experiment), the degrees of freedom for error would be zero.
Explanation:In a two-factor experiment, the degrees of freedom for error are calculated as (total number of observations - total number of treatments). Here we have 2 levels of temperature and 4 levels of gibberelin treatment. So, there are 2*4=8 total treatments. In this case, each treatment being tried on one seed means there are also 8 total observations. Thus, when the botanist attempts the experiment, the degrees of freedom for error would be (8-8)=0.
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The soil of the temperate forest is often rich in humus. Which statement best explains the presence of humus in the temperate forest?
Answer:
A. Humus forms from fallen leaves, dead wood, and other dead organic matter.
Option are the following;
A. Humus forms from fallen leaves, dead wood, and other dead organic matter.
B. Tree roots break rocks into humus as they grow.
C. Cold winter weather preserves humus in the soil.
D. Dry conditions allow humus to form
Explanation:
Humus is a type of organic matter which is formed due to the decomposition of plant parts and leaves by the action of decomposers such as bacteria and fungi. The soil of the temperate forest is often rich in humus because when the leaves falls from the trees when get older, these leaves mixes with the soil and due to the action of microorganisms such as bacteria and fungi. These microbes feed on these leaves and releases nitrogenous material which is used by the plants for making amino acid and enzymes etc.
Compare and contrast the work done by paleontologists and biologists
ANSWER AND EXPLANATION:
SIMILARITY: Both paleontologist and biologists carries out studies or experiments on organisms that were once alive.
DIFFERENCE: The paleontologist mainly studies fossils (i.e the remains of ancient organisms that once lived) to deduce various information about them (such their age, ancestral background and etc). Whereas Biologists are scientists whom studies is specifically on living organisms.
46. The experiments that clearly showed that DNA from every organism studied had an amount of adenine equal to the amount of thymine and a cytosine content equal to the content of guanine were conducted by: a. E. M. Sutton. b. Cohen and Boyer. c. Hershey and Chase. d. Erwin Chargaff. e. Rosalind Franklin. 47. A quiescent (non-dividing) human cell is most likely (or most correctly described as being) in: a. G1. b. S phase. c. G0 d. M phase. e. cytokinesis. 48. Who utilized the process of transformation, as originally demonstrated by Frederick Griffith, to p
The given question number 48 is not complete, the complete question is:
Who utilized the process of transformation, as originally demonstrated by Frederick Griffith, to provide the first solid evidence suggesting that DNA was the genetic material of living systems (in this case bacteria)?
Messelson and Stahl
Thomas Morgan
Erwin Chargaff
Hershey and Chase
Avery, McCarty and Macleod
Answer:
The correct answer of 46 is option d, that is, Erwin Chargaff.
The correct answer of 47 is option c, that is, G0 phase.
The correct answer of 48 is option e, that is, Avery, McCarty and Macleod.
Explanation:
46. Erwin Chargaff with the help of an experiment demonstrated that the amount of adenine present within the DNA is always equivalent to the amount of thymine present, similarly, guanine is always found in equal number to cytosine. He also demonstrated that pairing is always done between pyrimidines and purines within the DNA.
47. It is in the G0 stage, also known as the quiescent stage, where a human cell is found in the non-proliferating phase. It is also considered as the resting stage of the cell cycle in which cell gathers enough of the substances for its nourishment. When the cell moves into the G0 stage of the cell cycle, then the cell either goes to further stages of the cycle when needed or goes through the process of differentiation.
48. To prove that DNA works as a genetic substance, the Griffith experiment was further used by Avery, McCarthy, and Macloed. The experiment was again performed on a biochemical basis. In the experiment, distinct constituents of the bacterial cell were digested with the assistance of digestive enzymes, and in the process, it was found that when digestion of DNA was done, the process of transformation failed to take place. The performed experiment was also called the biochemical assay of transformation.
Which image shows an example of a zygote fungus?
They are all images, I don’t know which one?
Answer:
Zygote fungus is a group of fungi that includes a lot of common molds.
Explanation:
Zygote fungus is a group of fungi that includes a lot of common molds.
What is Zygote fungus?
A former subclass or phylum of the kingdom Fungi is called Zygomycota, often known as zygote fungi. The Mucoromycota and Zoopagomycota are the two phyla that the members now belong to. There are 1060 species in all, according to.
They live primarily on land, either in soil or on plant or animal matter that has decomposed. Others have symbiotic connections with plants, while others are parasites of plants, insects, and small animals.
When coenocytic, zygomycete hyphae only form septa where gametes are produced or to wall off dead hyphae.
Therefore, Zygote fungus is a group of fungi that includes a lot of common molds.
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Science knowledge indicates what can happen in natural systems not what should happen. Explain this statement and provide an example
Answer:
Science knowledge indicates what can happen in natural systems not what should happen because scientific knowledge give us a way in which things are done but sometimes it did not happen at that way.
Explanation:
Scientific knowledge cannot be used in all aspects of life such as politic, social and culture. In some matters, decisions were made not through scientific knowledge but by using the laws or principles of culture and society. Scientific knowledge give the possibility that an event can happen but sometimes we solve the problem according to the culture and laws of society.
The explanation regarding the given statement is due to the scientific knowledge because it provides us a way in which things are done but sometimes it did not happen at that way.
The following information should be considered:
Scientific knowledge cannot be applied in all aspects of life like politics, social and culture. In some matters, decisions were made not via scientific knowledge but by using the laws or principles of culture and society. Scientific knowledge provides the possibility that an event can happen but sometimes the problem could be solved as per the culture and laws of society.Learn more: https://brainly.com/question/1691136?referrer=searchResults
If people are aware of the dangers of social traps, they are more likely to cooperate with each other. Please select the best answer from the choices provided T F
Answer: True
Explanation:
In psychology a social trap can be defined as the group of people which obtain short term individual gain which in the long term leads to the loss of the people.
If people will known the after effects then they will operate with each other in order to avoid the loss of the people as a whole group.
Examples of social trap are over fishing, blackout, overgrazing of the cattles at the places where is already less vegetation.
Hence, the correct answer is True.
A molecule containing one unit of sugar is called a ____?
A molecule containing one unit of sugar is called a monosaccharide. Monosaccharides are the building blocks of carbohydrates and can contain either five or six carbon atoms.
A molecule containing one unit of sugar is called a monosaccharide. Monosaccharides are the simplest carbohydrates and are the building blocks for larger carbohydrate molecules.
Examples of monosaccharides include glucose, fructose, and galactose, which are all hexose sugars containing six carbon atoms.
Other monosaccharides include ribose and deoxyribose, which are pentose sugars containing five carbon atoms.
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I NEED HELP ASAP!!!!!!
Two scientists are debating how to classify a new animal species that they have discovered. They observe that the animal is capable of producing sperm.
What statement would they most likely make about the new species?
A)This animal produces offspring that are genetically different from itself.
B)This animal produces offspring that are genetically identical to itself.
C)This animal’s sperm will join with spores to produce offspring.
D)This animal’s sperm will undergo binary fission to produce offspring.
Answer:
#1
The correct answer is A.)
Because the animal has sperm that means that the offspring will be different. This is because at conception, the two parents sex cells combine their DNA to make a new creature.
Explanation:
Answer:
The Answer is A
Explanation:
I confirmed it in the quiz
List three questions about the human-honeyguide symbiosis that could be answered with further research.
Answer:
Do honeyguides in different areas of the world have a similar symbiosis with humans?
How old are the birds when they learn to respond to the humans’ calls?
Could other birds in the region form a similar symbiosis with humans?
Explanation:
Answer:
Do honeyguides in different areas of the world have a similar symbiosis with humans?
How old are the birds when they learn to respond to the humans’ calls?
Could other birds in the region form a similar symbiosis with humans?
Explanation:
Fossils show that there was a global heatwave about 56 million years ago. What were 3 results of that heat wave? PLEASE HELP ME!!!
Answer:
The results of the heat wave are the rising of sea levels, the oceans became more acidic, and species disappeared
Explanation:
About 56 million years ago, heat wave occurs due to the increase in the concentration of greenhouse gases which are present in the atmosphere. We know that greenhouse gases such as carbon-dioxide etc were the main cause of global warming. Due to this warming, many temperature sensitive species die, melting of ice occurs which increases the sea level and carbon-dioxide deposition occurs in the ocean water which make the water more acidic and the life of marine animals will be adversely affected.
Which image is an example of a rod-shaped colony of bacteria?
lam
Answer: The last one
Explanation:
Answer:
the last picture
Explanation:
Living things are classified into three domains. which domain would contain organisms that are unicellular and multicellular
Answer:
Unicellular - Archaea and Bacteria
Multicellular - Eukarya
Explanation:
Domain is the highest taxonomic rank in the hierarchical biological classification system, above the kingdom level. There are three domains of life, the Archaea, the Bacteria, and the Eukarya.
Final answer:
The domain that comprises both unicellular and multicellular organisms is the Eukarya domain, characterized by eukaryotic cells with membrane-bound nuclei and organelles. It includes animals, plants, fungi, and protists.
Explanation:
Living things are grouped into three domains: Bacteria, Archaea, and Eukarya. Both Bacteria and Archaea domains include prokaryotic organisms that do not have their genetic material enclosed in a membrane-bound nucleus. On the other hand, the domain that contains both unicellular and multicellular organisms is the Eukarya domain.
Organisms within the Eukarya domain possess cells with membrane-bound nuclei and various organelles. This domain is diverse; it includes familiar life forms such as animals, plants, and fungi, as well as protists, which are often less well-known. The characteristics that define this domain are the complex cells known as eukaryotic cells. As the most complex domain, Eukarya is subdivided into kingdoms that include both simple unicellular organisms like some protists and complex multicellular organisms like animals and plants.
The work of American microbiologist Carl Woese has greatly influenced this classification system by introducing the three-domain system based on genetic and cellular differences, which replaced the previous five-kingdom model.
Which feature forms as a result of a tectonic plate boundary that creates an underwater miuntainbrange in the open ocean?
Answer:
The answer is mid-ocean ridge
Explanation:
This geographical feature is found in divergent boundaries where tectonic plates are moving away from each other. The magma from mantle rises (upwells) to replace the void. Therefore, as magma rises and accumulates, as it cools into new crust, it forms mountain ranges along the boundary.
Which of the following conclusions can be drawn from the case study of Phineas Gage’s accident, which led to brain injury?
Phineas Gage's case suggests that the prefrontal cortex significantly contributes to an individual's personality. His recovery implies the concept of neuroplasticity, or the brain's capacity to adapt and change. However, the interpretations of Gage's personality changes might have been exaggerated due to a lack of comprehensive data.
Explanation:Based on the case study of Phineas Gage, we can draw the conclusion that the prefrontal cortex plays a crucial role in determining personality. Gage's personality significantly changed after an iron rod penetrated this specific region of his brain. This shift in behavior confirmed the idea of localization, the belief that certain functions are associated with specific regions of the brain.
Additionally, Gage's apparent return to functionality (by becoming a stagecoach driver after the accident) is associated with the concept of neuroplasticity. This refers to the brain's ability to adapt or alter in response to experiences or injuries. In Gage's case, even following such a traumatic incident, his brain managed some degree of recovery.
It is worth noting that the accounts of Gage's behavioral changes could have been overemphasized or skewed due to the contemporaneous scientific debate on localization and the lack of extensive information about Gage.
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The allele for brown fur in mice (B) is dominant over the allele for white fur (b).
The fur color of one mouse is represented by Bb.
What is the genotype of this mouse?
What is the phenotype of this mouse?
Answer:
Genotype: Bb (heterozygous)
Phenotype: brown fur
Explanation:
Since allele B is dominant to allele b, as long as genotype has allele B in it, its effect of phenotype will be expressed instead, regardless of whether allele b is present.
As mouse genotype is stated as Bb, on the chromosome from its parents, allele B comes from one parent while allele b is inherited from the other parent.
Phenotype is the expressed trait. In this case, as genotype has allele B, the phenotype will be brown fur as its effect is expressed.
Answer:
1) Bb
2)brown
Explanation:
Hope this helped <3
DNA markers that are found to segregate with a mutation of interest can be used to determine the mutation’s distance from the markers by looking at what? DNA markers that are found to segregate with a mutation of interest can be used to determine the mutation’s distance from the markers by looking at what? reverse mutation frequency forward mutation frequency single crossover frequency recombination frequency
Answer:
The correct option is D: recombination frequency
Explanation:
The recombination mapping technique makes it possible to measure the distance between the DNA marker and the locus where the mutation lies. For better accuracy at measuring this distance, multiple families have to be studied - families that are affected by the mutation of interest.
Hope that answers the question, have a great day!
Which of the following statements about cellulose is FALSE? Microtubules are directly attached to the outside surface of the plasma membrane to form tracks that help orient the cellulose polymers Cellulose is synthesized on the outside of the cell. An array of microtubules guides the cellulose synthase complex as it moves in the membrane Cellulose synthase enzyme complexes are integral membrane proteins
Answer:
Option A is false, the remaining statements regarding cellulose are correct
"Microtubules are directly attached to the outside surface of the plasma membrane to form tracks that help orient the cellulose polymers"
Explanation:
Cellulose is specific to plant cells walls only, animal cells do not contain cellulose. It is produced at the membrane of the cell. The microtubules are actually attached to the inside of the plasma membrane and it helps to orient the cellulose polymers that way. It provides vital structural support to the plant.
Hope that answers the question, have a great day!
The genomic sequence of the African great apes is compared to that of South American monkeys, and an average difference of about 7.0% is observed. This is much smaller than the difference between either primate or other mammals. What evidence of evolution is this an example of?
Select one:
Embryological
DNA
Molecular
Anatomical
A scientist wants to compare DNA of two plants. What technique can she use to produce bands of DNA fragments for this comparison.
It's Gel electrophoresis. Just took the test!
-Jazzy
De novo nucleotide synthesis differs for purine and pyrimidine bases. However, some molecules are important precursors and intermediates in both pathways. Which intermediates are common to both purine and pyrimidine nucleotide synthesis? orotate formate glycine aspartate PRPP Purine bases, which have two rings, have a more complex synthetic pathway than do pyrimidine bases, which have one ring. As a result, purine synthesis requires more components than pyrimidine synthesis. Which amino acids contribute atoms to the purine structure in de novo purine synthesis? lysine aspartate glycine glutamine histidine
Answer:
1. Aspartate and PRPP
2. Aspartate, glycine and glutamine
Explanation:
Aspartate is a precursor in both the synthesis of purine and pyrimidine. It aids in the formation of Carbamoyl Aspartate in pyrimidine synthesis while in purine, it contributes nitrogen 1 to the purine ring. PRPP is needed in the activation of ribose sugar in the purine nucleotide synthesis, while in that of pyrimidine, it aids in the conversion of orotate to OMP by adding phosphate group to orotate.
Aspartate, glycine and glutamine are precursors in the de novo synthesis of purine nucleotides. Aspartate contribts nitrogen 1, glycine cotributes C4, C5 and nitrogen 7 while glutamine contributes N3 and N9.
The process of formation of complex molecules from sugar and amino acids (complex molecules ) is called De nova synthesis.
1. The common intermediate in both purine and pyrimidine synthesis is :
Option D. Aspartate Option E. PRPPAspartate acts as a precursor in both purine and pyrimidine nitrogenous base formation. It forms carbamoyl aspartate during pyrimidine synthesis while it contributes one nitrogen to the purine ring during purine synthesis.
Phosphoribosyl pyrophosphate (PRPP) activates the ribose sugar in purine synthesis and converts orotate to OMP by adding phosphate during the pyrimidine synthesis.
2. The amino acid that contributes atoms to purine is:
Option B. AspartateOption C. Glycine Option D. GlutamineAll the above-stated amino acids are a precursor in the purine synthesis by the de nova process.
N1 is provided by aspartate, N7, C4 and C5 are contributed by glycine and N3 and N9 by glutamine amino acid.
Therefore correct options are 1. D and E, 2. B, C and D.
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