What is an important difference between the biosynthesis of purine nucleotides and pyrimidine nucleotides?

a. the growing pyrimidine ring is bonded to ribose while the ribose is added later to the purine ring.
b. purine nucleotides require n10- in their biosynthetic pathways.
c. the growing purine ring is bonded to ribose while the ribose is added later to the pyrimidine ring.
d. proline is the precursor for purine biosynthesis while it is not for pyrimidine biosynthesis.

The correct answer is option C.

Explanation:

The biosynthesis of the pyrimidines are the simple than the biosynthesis of the purines nucleotide as pyrimidines are synthesized rings first and added later to the ribose sugar.

The synthesis of the bases of the purines are synthesizes the ribose sugar is bind first and latter it is added to the purine ring which is ribose - 5- phosphate.

Thus, the correct answer is option C.

you didn't give any options but heres what i can tell you: an inference is likely to change based on additional observations. the latter is something that you have seen or sensed using your sensory organs while the former is like a conclusion out from what you have observed.

many other transport proteins, often called pumps, move materials against a concentration gradient. active transport drives molecules across a membrane from a region of lower concentration to a region of higher concentration. this process, shown in figure 5.1, uses transport proteins powered by chemi- cal energy.