How did James Watson and Francis Crick explain the DNA molecule’s consistent width?

1 answer:

5 0

Two of the nitrogenous bases present in DNA (Guanine and Adenine) contain two rings and thus are much larger than the other two (Cytosine and Thymine), which have only one. Nitrogenous bases with two rings (such as G and A) are known as PURINES, whereas nitrogenous bases with a single ring (such as C and T) are known as PYRIMIDINES. A stable DNA structure is formed ONLY when the two strands are a constant distance apart which ONLY happens when a PURINE (G or A) on one strand is paired with a PYRIMIDINE (C or T) on the other strand. The strands would have to move much further apart to permit a purine to pair with another purine and would have to move much closer together to permit a pyrimidine to pair with a pyrimidine. (Source: https://www.amherst.edu/system/files/media/1536/ModGen_1C_TP.pdf )

You might be interested in

PLEASE HELP is this right?? its timed and i put biosphere last time and got it wrong

jolli1 [7]

Answer:

its population.

Explanation:

i hope this is right

8 0

3 years ago

Organisms become extinct for many reasons. All BUT one is reason for extinction. That is

igomit [66]

Answer:

A) Adaptations

Explanation:

If a species learns to adapt to their environment, then they will not become extinct

5 0

3 years ago

Read 2 more answers

Select the part whose main job is to direct a plant cell's activities by sending instructions to different parts of the cell.

Gelneren [198K]

Answer: The nucleus

Explanation: It directs the cell's activities in the plant and animal cells.

7 0

3 years ago

If you have a hamster with long fur, what possible genotypes could the hamster have?

Vadim26 [7]

Answer:

Ll, Ll, LL

Explanation:

So, there is one thing we must remember to answer this:

1# dominant genes(long fur) are expressed over reccesive genes(short fur)

Knownign that dominant is over reccesive, it is simple. If the genotype was Ll or lL then the dominant long fur would be expressed over reccesive short fur. Long fur - Ll, lL

Next, we know that LL will be long fur since its both long and long, and there is no possibility for short fur. Long fur - LL

Finally. we have ll, and since there isnt a dominant long fur, and only reccesvie short, then this cannot be long fur. Short fur. - ll

8 0

3 years ago

Grasses → mice → cat → coyote As matter and energy move from grasses to coyotes the amount of available energy

Gnesinka [82]

The answer would be C. Energy is used through the food chain so energy always decreases. Population size would commonly decrease according to the pyramid of food chain but since there's no answer for that, C would be the most suitable

3 0

3 years ago

Read 2 more answers