Why can't rna adopt a b-form helical structure?

Answers

Answer 1
Under physiological condition, RNA exists in an A form helix structure unlike DNA which adopts a B form helix structure. The A conformation found in RNA is caused by the steric limitation imposed on RNA by its ribose components. The steric clash between the second and third hydroxyl groups in the ribose component of the RNA molecule makes the formation of B form by the RNA molecule to be unfavourable, therefore the RNA is forced to adopt the A conformation. This A conformation is also responsible for the more stable structure of the RNA molecule.

Related Questions

One important relationship between chemical and mechanical weathering is

Answers

Answer:

mechanical weathering can produce smaller pieces of rock that have more surface area for chemical weathering to work on.

Explanation:

As mechanical weathering breakdown the rocks into smaller pieces, mechanically, the chemical weathering on the rocks also increases. This is because smaller pieces of the rock have a larger surface area to volume ration on which chemical weathering can act upon. This even further increases the weathering of the rock.

How might abundant amounts of food allow herons to reproduce more often?

Answers

An abundant amount of food means that the competition over food will be less and chance to get food will be higher. This will increase the survivability of the herons so there will be more herons survive until reproduction age. That means the number of herons reproducing will be increased. Reproduction also needs resource and less happens when competition is fierce. Abundant food makes the herons able to recover more quickly. 

All of the following are part of a prokaryotic cell except All of the following are part of a prokaryotic cell except an endoplasmic reticulum. a cell wall. DNA. a plasma membrane. ribosomes.

Answers

endoplasmic reticulum

Answer: Endoplasmic reticulum

Explanation:

The endoplasmic reticulum is a membrane bound organelles which is found in the eukaryotic cell. This is found in the eukaryotic cell that forms a inter connected network of flattened membrane- enclosed in the sacs.

The enclosed sac or tube like structure in the cell is known as cisternae. It is a double membrane bound organelle which helps in the modification and sorting of proteins.

The correct answer is endoplasmic reticulum.

What effect would a drop in the size of the krill population have on the antarctic food web and why?

Answers

Euphasia superba, Antarctic krill, are the base of the food chain in the Southern Ocean that surrounds Antarctica. Any decline in their population would mean that the remainder of the food chain would be forced into warmer water to find food. 

Answer:

Krill is an zooplankton species that is extremely abundant in Antarctic water bodies. These zooplanktons feeds on phtoplanktons present in the Antarctic water bodies. Therefore, in antarctic food chain Krill belong to primary consumer trophic level. In Antarctic they are source of food for seals, penguins, whales, fishes and birds. These are included in secondary, tertiary and quaternary trophic levels of the food chain. The drop in the size of the krill population will result in limitation of populations of species at higher trophic levels. As, many food chains are interconnected to form a food web therefore, the drop in size of Krill in one food chain will also affect the overall food web of Antarctica.

True or false? pathogens can enter the body through animal bites.

Answers

they can enter through wounds/bites, so probably, yes

Jack was diagnosed with persistent depressive disorder and has experienced recurrent episodes of major depressive episodes. in the intervals between the episodes, he does not seem to return to ""normal."" jack's condition is referred to as

Answers

Jack's condition is referred to as DOUBLE DEPRESSION.
Double depression is a medical condition in which the affected individual experience chronic depressive mood which is accompanied by one or two other symptoms of clinical depression which last for a minimum of at least two years. It is often a difficult condition to treat.

Which layer contains loose connective tissue and has about half of the body's stored fat?

Answers

The hypodermis below the dermis of the skin is the answer. The hypodermis contains areolar and adipose (fat) types of connective tissue.

Territorial behavior does not extend to organisms of different species. please select the best answer from the choices provided t f

Answers

false! Territorial behavior does not extend to organisms of different species.

The given statement is false.  

The territorial behavior is an intra-species social behavior of the organism. In territorial behavior, the organism marks its territory and prevents it from the incursion of the other members of the same species. This behavior is not an inter species behavior, so, the effectiveness of the marking of the territory remains within the same species.  


Fraternal twins are ________ similar genetically than are regular, non-twin siblings.

Answers

Final answer:

Fraternal twins are no more similar genetically than are regular, non-twin siblings. Fraternal twins have the same level of genetic similarity as non-twin siblings because they come from different eggs fertilized by different sperm. Their similarity in IQ likely stems from similar environmental treatments rather than genetics.

Explanation:

Fraternal twins are no more similar genetically than are regular, non-twin siblings. Fraternal twins develop from two different eggs that are fertilized by different sperm, meaning their genetic material varies the same as in non-twin siblings. Although fraternal twins may have more similar IQs than do nontwin siblings, this similarity in IQ is likely due to the fact that they are treated more similarly than are siblings in terms of environmental factors, rather than having more genetic similarity.

How is a cell like factory?

Answers

Transcript of A Cell is like a Factory. The cytoplasm contains the organelles, just like how the factory floor contains all the machines and workers. The ER is where the ribosomes do there work to create proteins. ... The cell membrane regulates what enters and leaves the cell,similar to factories shipping department.
Final answer:

Cell is like a factory because Cells and factories are analogous because they operate in a methodical manner, with various parts carrying out specific functions to achieve a larger goal. For example, factories produce goods using blueprints, while cells carry out functions like protein synthesis based on DNA instructions

Explanation:

Cells are often compared to factories due to their similar functional structures and operations. For instance, a factory has different departments that specialize in different functions, in the same way, a cell has different organelles each performing a specific role to maintain the cell's overall function, much like a factory's assembly line.

Each cell contains genetic instructions in the DNA much like the blueprints used in a factory. The Proteins, which are crucial for most of the cell's functions, are produced in the ribosomes, similar to a commodity being produced in a factory. This analogy is further highlighted by the cell cycle, where cells grow and divide to produce more cells in a controlled and systematic manner similar to a production line in a factory.

As both cells and factories operate in a systematic and controlled manner, with several small components working together to achieve a larger goal — survival in the case of cells, and production in the case of factories.

Learn more about cell and factory analogy here:

https://brainly.com/question/13629941

#SPJ2

An unresponsive, pulseless, apneic patient presents with ventricular tachycardia on the cardiac monitor. after defibrillating the patient, you should:

Answers

you should continue to monitor the patient

Correctly match the term and definition: extending a body past the anatomical position

Answers

hyperextension.

Hyperextension is a extension of a limb, a joint or part of the body beyond the normal limit.This can be a good exercise that works the lower back, the mid and upper back, specifically the erector spinae that suport our spine.

Basically, this range of motion is how far in each direction that joint can bend comfortably.



The presence of a prosthetic implant indicates that the skeleton is definitely not prehistoric.
a. True
b. False

Answers

False 23 the presence of prosthetic implant indicates that the skeleton is definitely not prehistoric True 24 a skull B c long limb bones Dall of 41

The prefix 'mono' means _______________ while the suffix 'saccharide' means ______________. Therefore, a ________________________ is a simple sugar. Glucose is a common example used in class.



Two, protein, monosacchraride


Two, sugar, monosaccharide


One, lipid, monosaccharide


One, sugar, monosaccharide

Answers

"One, sugar, monosaccharide"

A monosaccharide is a simple sugar because it has only one sugar molecule. The most common monosaccharides are the glucose, fructose and maltose.
A disaccharide is when there are two sugar molecules. Di, means two. From three to ten sugar molecules is called oligosaccharides because oligo means "few". Polysssachrides is when there are many sugar molecues. Poly indicates many.

Interpreting the results of an experiment requires critical thinking skills and the ability to make connections across data. Which skill would most likely benefit a scientist who is doing this?

Answers

creativity would be the answer

Answer:

The correct answer is the skill of memorization.

Explanation:

The memorization of the information assists the scientist in recalling all the theories and the facts that are associated with the experiments. In a situation, when the scientist remembers all the things, the assessing of the data would become easier, as he or she can associate the information without considering various sources. Thus, memorization would play an essential part in forming connections through the data.

"in _____________, a radiopharmaceutical is inhaled to obtain a lung scan"

Answers

In Ventilation studies, a radiopharmaceutical is inhaled to obtain a lung scan.

The property of water whereby molecules tend to stick to one another is called:

Answers

The property of water whereby molecules tend to stick to one another is called adhesion. 

I hope this helps!

Adhesion and cohesion effect every water molecule on Earth and their interactions with other molecules.

What is adhesion and cohesion?

The ability of similar molecules (of the same substance) to adhere to each other as a result of mutual attraction is the quality known as cohesion. The capacity of distinct molecules or surfaces to attach to one another is referred to as adhesion. Solids, for instance, possess excellent cohesive qualities, which allow them to avoid adhering to the surfaces with which they come into contact.

Cohesion: Water has a natural tendency to attract more water. Adhesion: Water has a tendency to draw other substances to itself. Both adhesion and cohesion are qualities of water that have an effect on each and every water molecule on the planet, as well as the way water molecules interact with the molecules of other substances.

Learn more about adhesion and cohesion, here:

https://brainly.com/question/13437383

#SPJ5

Order the taxa from largest (first) to smallest (fifth). 1. first phyla/division 2. second kingdom 3. third class 4. fourth order 5. fifth domain .

Answers

you just did it in order

In the taxonomic classification system, the correct order from most inclusive to most specific is: Domain, Kingdom, Phylum/Division, Class, Order, Family, Genus, and Species.

To order the given taxa from the most inclusive (largest) to the most specific (smallest), we need to understand the taxonomic classification system. This system, established by Carl Linnaeus, organizes living organisms into hierarchical categories. Starting from the broadest category, the correct order is as follows:

DomainKingdomPhylum/DivisionClassOrderFamilyGenusSpecies

Note that in the original list, Phyla/Division is listed as the largest, which is incorrect. In the correct order, the Domain is the largest category, and Species is the most specific.

Which part of a cell is the gel-like fluid in which organelles move?

Answers

the anwser is cytoplasm

Why are the structure and function of the pont du gard described as "marks of roman civilization"?

Answers

The bridge, with its round arches, symbolizes the Roman's strength and versatility in developing the bridge to be as part of an aqueduct as well as a walkway for its city. This style is characteristic of the Romans' care for their cities by using their ability to harness nature to create a functional structure.

How does crossing over add to the genetic diversity of sexually reproducing organisms?

A: It involves segments of two homologous chromosomes trading places.

B: It involves random segregation of the homologous chromosomes to each daughter cell.

C: It involves fertilization of an ovum by any one out of millions of sperms.

Answers

the answer is B. it involves random segregation of the homologous chromosomes to each daughter cell

The correct answer is 
B) It involves random segregation of the homologous chromosomes to each daughter cell.

1. Perform a cross between two pea plants with the following characteristics: One is heterozygous for the dominant trait of wrinkled seeds (W); the other is homozygous for the recessive trait of smooth seeds (w). Fill in the genotypes of the offspring in the Punnett square. Then state the percentages of each genotype and phenotype of the offspring.

Answers

Ww, Ww, ww, ww

 0% homozygous dominant (WW), 50% heterozygous (Ww) and 50% homozygous recessive (ww). The phenotype is 50-50, or half wrinkled seeds, half smooth seeds (2 Ww : 2 ww) 

Answer:

Possible Genotypes are Ww and ww

Percentage of genotype Ww - [tex]50[/tex]%

Percentage of genotype ww - [tex]50[/tex]%

Possible phenotypes are Wrinkled and smooth

Percentage of Wrinkled  phenotype  - [tex]50[/tex]%

Percentage of smooth phenotype - [tex]50[/tex]%

Explanation:

Given -

Parent I  is heterozygous for the dominant trait of wrinkled seeds. Thus, its genotype would be "Ww"

Parent II is homozygous for the recessive trait of smooth seeds. Thus, its genotype would be "ww"

The punnet square representing the cross between "Ww" and "ww" is as follows -

W w

w Ww ww

w Ww ww

Possible Genotypes are Ww and ww

Percentage of genotype Ww - [tex]50[/tex]%

Percentage of genotype ww - [tex]50[/tex]%

Possible phenotypes are Wrinkled and smooth

Percentage of Wrinkled  phenotype  - [tex]50[/tex]%

Percentage of smooth phenotype - [tex]50[/tex]%

Distinguish between external and internal stimuli. give an example of each.

Answers

for a organ or organism to respond to a external is called sensitivity tbh i dont know internal .. sorry ut if this helped at all please thank me :) 

organism to respond to a external is \sensitivity

Explanation:

Scientists often form hypotheses based on particular observations. Which of the following is NOT true of a good hypothesis?
A) A good hypothesis is complex.
B)A good hypothesis is testable.
C) A good hypothesis is logical.
D)A good hypothesis predicts future events.

Answers

the correct answer is A, a good hypothesis does not have to be complex

Which would be the best evidence that a cell is using active transport to move a substance across its cell membrane?

Answers

icwyauYIsks :-) s j k koo oplvzskk mlllllllllxlzxxvklk nom

Answer:

what are the options

Explanation:

The phase of mitosis during which the chromosomes move toward separate poles of the cell is

Answers

the phase of mitosis during which the chromosomes move toward separate poles of the cell is called anaphase

"what happens to the neurons in your brain every time you learn something new?"

Answers

Learning something new causes thebrain to build connections between neurons, replacing some of those we lose over time.

Amphibians develop special adaptation to live in water and on land.
Although amphibians spend their early lives in water, they undergo..
A-metamorphosis B-regeneration C-molting
to develop ..
A-trachea B-lungs c- gills,
so that they can survive on land.

Answers

the answer is A and B

The correct answer is A metamorphosis and B lungs.

Amphibians develop special adaptation by which they are compatible of living both on land and in water.

The animals that live on land needs lungs to respire and the animals that live in water needs gills to respire.

The amphibians live in water in the starting days of their life as they have gills later they undergo through metamorphosis in which there is a development of lungs to live on land.

I have a lot and I mean a lot of work if anyone would be willing to help out on this I would be so thankful, please site the websites!!!!!!! Thank you so much

Answers

Hi. I know for a fact (on the web) that they all have sells in their body. They also can breathe. Through lungs or gills underwater and shore creatures are breathing and their calls are a part of their system. But I do not know if bactierium is living with cells or gills/lungs
Hope this helped!!!v :D

Which is more useful when identifying a mineral: the mineral's color or the mineral's streak?

Answers

with the mineral's color
Other Questions
What is mercantilism Is the expression 3x+2x4 in simplest form which element of art would this tool help an artist to understand?A. lineB. shape C. color D. space One of the challenges for smaller businesses in using collaborative enterprise 2.0 tools is ________. Each exterior angle of an equilateral triangle has which measure? What is the difference between the crime control model and due process model? Consuming more than 60 grams of fiber per day poses some health risks, such as ________. decreased mineral absorption due to chemical binding by the fiber blockage of the intestinal tract decreased appetite in some individuals all of these choices are accurate. Describe oxygen transport in exercise and training ( the respiratory and cardiovascular response to exercise) A scuba diver used the expression below to describe his position in relation to sea level.2 + (20) + 8Which statement could describe the divers movements? Starting on a platform 2 feet above sea level, dive down to a location that is 18 feet below sea level, and then rise 8 feet.Starting on a platform 2 feet above sea level, dive down to a location that is 20 feet below sea level, and then rise 8 feet.Starting 2 feet below sea level, dive down 20 more feet, and then rise to a location that is 8 feet below sea level.Starting 2 feet below sea level, dive down 18 more feet, and then rise to a location that is 8 feet below sea level. why proper nutrition is especially important in promoting optimal health for pregnant women, mothers ,babies, and young children The time at which the mailman delivers the mail to ace bike shop follows a normal distribution with mean 2:00 pm and standard deviation of 15 minutes. you need to do a research paper on global warming which of the following would be a reliable source for the information you needA. a popular tabloid magazineB. a scientific journal about global literacy C. an environmental government agency's website D. a website that can be edited by anyone Brandon bought a gallon of paint that covers 160 square feet. He wants to paint a wall that is 10 ft. high and 12 ft. wide. Explain whether he will need more than one gallon of paint. A. No, he won't need more paint. Brandon has enough paint to cover the 22-square-foot wall. B. Yes, he will need more paint. Brandon needs another gallon to cover the 240-square-foot wall. C. No, he won't need more paint. Brandon has enough paint to cover the 120-square-foot wall. D. Yes, he will need more paint. Brandon needs enough paint to cover the 1,200-square-foot wall. Chemical formula for copper I acetate Which cabinet department did congress create shortly after the 9/11 terrorist attacks? Find an equation for a line that passes through the point (0, 3) and parallel to another line whose slope is 1.2. The ecological approach emerged as a reaction _____. What type of bonding occurs in a sample of pure chromium, cr? in other words, how is one chromium atom held to another chromium atom? what factors may have pushed african americans to migrate or rural areas to urban areas What is The largest religion in India today? Steam Workshop Downloader