Question

Which of the following is a purine ?
(a) Prokaryotes (b) Guanine
(c) Thymine (d) Uracil

Answer 1

Answer:

b) guanine

Explanation:

guanine and adenine are purines while cytosine,

uracil and thymine are pyrimidines

Answer 2

Guanine is a Purine.

Option (B).

Explanation:

• Guanine is the nucleobase that is observed in the nucleic acid of DNA.

• The nucleoside of guanine is guanosine

• There are many naturally occurring purines.

• Guanine is always paired with a hydrogen bond.

• It includes the nitrogenous base of adenine and guanine.

• Purines are larger than pyrimidines.

• Purines and pyrimidines are the nitrogen bases of both DNA and RNA nucleotide bases.

• Adenine and Guanine, which are the double-carbon nitrogen ring bases.

• Adenine and guanine are the same purines as in both RNA in DNA and it contains a two-ring structure.

Learn more about Purines

What bases are purines?  

https://brainly.in/question/9215778

Compare the structures of purines and pyrimidines. can you find out why the distance between the two polynucleotide chain in DNA remains almost constant?

https://brainly.in/question/1366679