Given below are group of terms. In group, the first pair indicates the relationship between the two terms. Rewrite and complete the second pair on a similar basis.
Adenine : Thymine :: Cytosine : ……………..
Given below are group of terms. In group, the first pair indicates the relationship between the two terms. Rewrite and complete the second pair on a similar basis.
Adenine : Thymine :: Cytosine : ……………..
Types of nitrogenous bases
There are two types of nitrogenous bases found in the DNA:
(a) Purine
(b) Pyrimidine
Purine
1. It is a nine-membered, double- ringed structure.
2. Examples of purine are adenine (A) and guanine (G)
Pyrimidine
1. It is a six-membered, single-ringed structure.
2. Examples of pyrimidine are thymine (T) and cytosine (C)
Bonding among nitrogenous bases
1. Hydrogen bonds are present among purine and pyrimidine.
2. Adenine bonds with thymine and guanine bonds with cytosine.
Correct answer
Therefore, the correct pair for cytosine is guanine.
Types of nitrogenous bases
There are two types of nitrogenous bases found in the DNA:
(a) Purine
(b) Pyrimidine
Purine
1. It is a nine-membered, double- ringed structure.
2. Examples of purine are adenine (A) and guanine (G)
Pyrimidine
1. It is a six-membered, single-ringed structure.
2. Examples of pyrimidine are thymine (T) and cytosine (C)
Bonding among nitrogenous bases
1. Hydrogen bonds are present among purine and pyrimidine.
2. Adenine bonds with thymine and guanine bonds with cytosine.
Correct answer
Therefore, the correct pair for cytosine is guanine.
