Which two scientists worked together to develop a three-dimensional model of DNA?
A. Miescher and Wilkins
B. Crick and Miescher
C. Franklin and Watson
D. Watson and Crick
Answer:
D. Watson and Crick
Explanation:
Watson and Crick built on the findings from X-ray diffraction study of the DNA by Maurice Wilkins and Rosalind Franklin to analyse the structure of the DNA.
Findings from their analyses were published in 1953 and the two went on to receive Nobel price based on their findings later on.
The correct option is D.
A cell with chloroplasts and a cell wall made of cellulose would likely belong to a(n)
Answer:
The correct answer will be-kingdom plantae.
Explanation:
The Plantae kingdom represents the diversity of the plants present on the earth.
The plants are also living organism made up of cells which shows distinguishable features from the kingdom Animalia as the cells contain a green pigment capable of performing photosynthesis called chloroplast and a cell wall around plasma membrane made up of a carbohydrate called cellulose.
Thus, the kingdom Plantae is the correct answer.
what is the definition of bias?
Physicians who specialize in bariatrics treat which patient population?
You have been called to a bar full of intoxicated patrons for a 46-year-old man who fell off his stool, injuring his left arm. as you assess his arm, he screams in pain. several of the patrons get angry and yell for you to give him something for pain. someone in the back throws a bottle in your direction. what should you do next?
In an emergency where you're dealing with a potentially volatile crowd, try to deescalate, communicate professionally, and notify security or law enforcement. Enforcing a safe and controlled environment is pivotal. Once stability is restored, attend to the patient and provide necessary medical treatment.
Explanation:In this scenario, the foremost duty is to ensure the safety of yourself and your patient. To follow the bystander effect instructions, your first action should be to try to deescalate the situation, communicating calmly and professionally with the patrons. Explain that you are a medical professional there to assist and that their actions are hindering his care.
If this fails, your next immediate action should be to seek help from security or notify local law enforcement. You need to ensure that you and the patient are safe and that the environment is controlled. Authorities will deal with the unruly crowd, allowing you to focus on providing medical care.
Once the situation is under control, you can then attend to the injured man and provide the necessary medical treatment. Remember that in emergencies, the priority is always safety first, followed by appropriate medical care.
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What characteristics of bacteria make certain species pathogenic and hard to combat?
Vinaya learned from her science teacher that her height probably resulted from about 180 genes, each contributing a tiny amount of genetic information. vinaya learned that her height resulted from ___
Vinaya learned that her height was due to additive genes. Addictive genes are those gens that is code for the traits and its effect work together on the phenotype, an example of function of additive genes is on the eye color and height of the human that are cause by additive alleles.
1. What is a macromolecule? Name four macromolecules present in all living things and identify what they have in common.
The portion of an enzyme that binds specifically to the substrate or substrate is referred to as
The active site is the portion of an enzyme that binds specifically to the substrate or substrates. Enzymes are highly specific due to the shape and chemical environment of their active sites.
Explanation:The portion of an enzyme that binds specifically to the substrate or substrates is referred to as the active site. The active site is a unique region within the enzyme where the substrate molecules can bind and undergo a chemical reaction. Enzymes are highly specific due to the shape and chemical environment of their active sites, allowing them to only bind to compatible substrates.
A substance that speeds up a chemical reaction—without being a reactant—is called a catalyst. The catalysts for biochemical reactions that happen in living organisms are called enzymes. Enzymes are usually proteins, though some ribonucleic acid (RNA) molecules act as enzymes too.
Enzymes perform the critical task of lowering a reaction's activation energy—that is, the amount of energy that must be put in for the reaction to begin. Enzymes work by binding to reactant molecules and holding them in such a way that the chemical bond-breaking and bond-forming processes take place more readily.
Briefly explain how genetic makeup of human beings is closely associated with their disease?
a mother has one allele for color blindness and one allele for normal vision. what is the probability that her gamete will have the allele for color blindness
Answer: The correct answer is -
The probability that gamete of female will have the allele for color blindness is 1/2 that is half.
Explanation:
Color blindness is a X linked recessive disorder. It means that a female can only have color blindness if the gene for color blindness is carried by both the X chromosomes (that is homozygous recessive genotype) .
As per the given information in the question, mother contains one allele for color blindness and one for normal vision
This means that mother is a carrier of colorblindness.
Therefore, two different gametes produced by her are- X and [tex]X^{c}[/tex].
Thus, probability of gamete having allele for colorblindness is 1/2.
plant parts that contain a lot of poisonous materials to protect them from being eaten by animals would have many ?
Most _____ are crops like corn, goldenrod, or clover.
Answer:
Mesophytes
Explanation:
Corn, goldenrod, or clover are examples of mesophytes.
Mesophytes are the species of plants that survive in regions with moderate environmental conditions. Their body structure consists of well-developed fibrous roots and branched stem.
Mesophytic species of plants include the following
a) Agricultural crops
b) Plants and trees grown in garden
c) Flowering trees like deciduous trees
Among, the given options corn and clover are agricultural crop while golden rod is a garden flowering plant.
Thus, most mesophytes include crops like corn, goldenrod, or clover.
What would happen to the animals if all the plants in their ecosystem died?
Flatworms are capable of reproducing sexually or by _____. budding fragmentation reverse osmosis
Answer:
Fragmentation
Explanation:
Fragmentation is the mode of asexual reproduction in which the parent body breaks into several pieces. Each of these pieces develop into new organism by regenerating the missing parts. Flatworms reproduce by both sexual and asexual methods. The asexual method of reproduction in flatworms include fragmentation.
Which question can be answered using the scientific process
Answer:
What is the effect of plastic bags on birds?
Explanation:
just did the question
Who named the cell and how did he come up with that name ?
Which two neurotransmitters have roles in appetite suppression?
Two neurotransmitters that have roles in appetite suppression are Serotonin and Dopamine.
Serotonin is a neurotransmitter that contributes to feelings of well-being and satiety. Higher serotonin levels in the brain are associated with reduced food cravings and a decreased appetite. Some medications that increase serotonin levels are used to help control appetite and manage weight.
Dopamine plays a role in the brain's reward and pleasure centers. When dopamine levels are balanced, it can help regulate food intake by providing a sense of reward and satisfaction after eating. However, imbalances in dopamine levels can contribute to overeating and unhealthy eating patterns.
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Which polymers are composed of amino acids? hints which polymers are composed of amino acids? monomers proteins carbohydrates nucleic acids?
Answer:
The correct answer is Proteins.
Explanation:
Proteins are composed of amino acids, which are made, at the same time, of nucleotides (three nucleotides per amino acid). The amino acids bind with a peptidic bond and form proteins in extremely complex and highly rolled-up structures. Therefore, the amino acids are the monomers of proteins.
Proteins polymers are composed of amino acids. The correct option is B.
Thus, The building blocks of proteins are amino acids, which are also made up of nucleotides (three nucleotides per amino acid).
Incredibly intricate and tightly rolled-up structures of proteins are created when the amino acids bind with a peptidic link. As a result, proteins' monomers are their amino acids.
A polypeptide chain is created when peptide bonds are used to connect amino acids. To create a useful protein, the polypeptide chain can fold and interact with other molecules. Proteins serve a variety of purposes in the body, including molecular transport, cell signalling, immunological response, and structural support for enzymes.
Thus, Proteins polymers are composed of amino acids. The correct option is B.
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Can you get carpal tunnel at a young age
why are quantitative data particularly helpful to scientists
Quantitative data are vital to scientists as they provide objective numbers and statistics for analysis. Such data help identify patterns, test hypotheses, make predictions, and formulate theories in various scientific fields like Biology and Physics.
Explanation:Quantitative data are exceptionally useful to scientists due to several reasons. Primarily, quantitative data deals with numbers and statistics that can be measured and analyzed objectively. This type of data allows scientists to perform statistical analysis to deduce patterns, trends, and relationships among different variables.
For example, in Biology, a scientist may gather quantitative data about a population of animals, like the number per square mile, to create models of population growth. In Physics, a scientist may measure the speed of an object to investigate the law of motion.
By analyzing this numerical data, scientists can make predictions, test hypotheses, and draw factual conclusions, which they can use to develop theories or plan interventions. Hence, the importance of quantitative data in the scientific process is irrefutable.
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Why is the cell membrane described as a fluid mosaic model?
The cell membrane is described as a fluid mosaic model due to its dynamic nature and composition. It's 'fluid' because of the ability of membrane components like phospholipid molecules and embedded proteins to move laterally within the membrane. It's 'mosaic' because of various components, like lipids and proteins, creating a complex pattern.
Explanation:
The cell membrane is described as a fluid mosaic model due to its dynamic nature and composition. This model was proposed by S. J. Singer and Garth L. Nicolson to better explain the structure and function of the plasma membrane.
The model describes the plasma membrane's structure as a mosaic of various components including phospholipids, cholesterol, proteins, and carbohydrates which are able to move and change positions, while maintaining its integrity. The 'fluid' part of the model refers to how certain components such as phospholipid molecules and embedded proteins can move laterally within the membrane. This fluidity is essential for the activities of certain enzymes and transport molecules within the membrane.
The 'mosaic' part refers to the diverse array of lipid and protein components that form complex patterns within the membrane. These components exist as separate but loosely attached molecules, similar to the tiles of a mosaic picture, hence the term 'mosaic'.
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Which form of genetic material initiates RNA interference?
A) double-stranded DNA
B) double-stranded RNA
C) single-stranded DNA
D) single-stranded RNA
The correct answer is option B, that is, double-stranded RNA.
An RNA-dependent gene silencing procedure known as RNA interference is mediated by the RISC (RNA-induced silencing sequence) and is stimulated by the molecules of short double-stranded RNA in a cytoplasm of the cell where they associate with the argonaute, that is, a catalytic RISC constituent.
An organism is a multicellular autotroph with eukaryotic cells. To what kingdom does it belong
Answer:
Plants or Plantae
Explanation:
Why would an ecosystem with only a few different types of organisms have less complex food web than any ecosystem with many different types of organisms?
Fewer organisms are required to complete a less complicated food web, more nutrients are taken up and less energy is required to complete the food web.
What is a food web?Because fewer creatures are required to complete a less complex food web, more nutrients are absorbed, and less energy is required to complete the food web.
A food web is a network of interrelated food chains that represents the movement of materials and energy within an ecosystem.
In less complex food webs exist in ecosystems with fewer distinct types of organisms than those with many different types.
In a food chain, the many arrows symbolize the various species that are being consumed by one another and so reflect the flow of energy. Additionally, it shows that an animal can eat a variety of foods.
Therefore, in a less complex food web, few organisms are needed to be presented.
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In the chemical process of photosynthesis water is a
Water acts as a reactant in the process of photosynthesis, wherein it is combined with carbon dioxide and the sun's energy to produce glucose and release oxygen. The process mainly takes place in the chloroplasts of plant cells and is essential for the survival of many organisms.
Explanation:In the chemical process of photosynthesis, water is a reactant. This means it is one of the substances that are consumed during the process to produce glucose and oxygen. The chemical equation for photosynthesis is 6CO2 + 6H₂O + Light Energy → C6H12O6 + 602, which clearly shows water (H₂O) as a reactant. Photosynthesis is crucial for converting light energy from the sun into chemical energy stored in glucose, which serves as food for plants. Additionally, the oxygen released is essential for the survival of many life forms that rely on it for respiration.
The process primarily occurs in the chloroplasts of plant cells where water, combined with carbon dioxide and the sun's energy, undergoes a complex set of reactions. Initially, in the light reactions, water is used, and oxygen is released. Energy in the form of ATP and NADPH is produced, which then fuels the Calvin Cycle to synthesize glucose. The glucose produced is an energy-rich sugar molecule that organisms utilize for various metabolic activities, including cellular respiration.
Final answer:
Water acts as a reactant in the process of photosynthesis, which is essential for converting light energy into chemical energy, producing glucose and oxygen.
Explanation:
In the chemical process of photosynthesis, water is a reactant. This process is crucial for life on Earth as it converts light energy into chemical energy and releases oxygen. The overall chemical equation for photosynthesis is 6CO2 + 6H₂O + Light Energy → C6H12O6 + 6O2. During photosynthesis, plants, algae, and certain bacteria capture light energy from the sun and utilize carbon dioxide and water from their environment. Using this light energy, they produce glucose for their own energy needs and oxygen as a byproduct, which they release into the atmosphere. The stored glucose is typically converted to starch in plants and is vital as it acts as a food source for them, which is then used to generate ATP during cellular respiration. The oxygen released is critical for animal life and represents the oxygen we breathe in the Earth's atmosphere.
Check all ways below to ensure that the bases in RNA are properly paired.
Make sure the letter T is substituted for the letter U.
Make sure the letter U is substituted for the letter T.
Make sure that A matches U and that C matches G.
The right answer are B (it means the letter U will replace the letter T) and C.
RNA (ribonucleic acid) is obtained from DNA through transcription.
RNA is complementary to the template strand of the DNA (antisense strand), according to Watson and Crick pairing rules (AU / T and CG) and is therefore identical to the coding strand of the DNA (sense strand), the riboses and uraciles (present only in RNA).
Explain the main difference between organisms of the domains bacteria and archaea and organisms of the domain eukarya.
Refer to the figure below.
H3C--OH
What type of chemical bond connects the carbon and
oxygen atoms in the molecule shown?
a) Nonpolar covalent bond
b) Asymmetric bond
c) Polar covalent bond
d) Hydrogen bond
Botulinum toxins binds to receptors present at the axon terminal in order to enter the neuron. What vesicular transport process do you think is involved in the toxin entering the nueron?