BIOMOLECULES AND ENZYMES

BIOLOGY

NUCLEIC ACIDS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which of the following are nitrogenous bases of the pyrimidine type?
A
Guanine and adenine
B
Cytosine and uracil
C
Thymine and guanine
D
Ribose and deoxyribose
Explanation: 

Detailed explanation-1: -The pyrimidine bases are thymine (5-methyl-2, 4-dioxipyrimidine), cytosine (2-oxo-4-aminopyrimidine), and uracil (2, 4-dioxoypyrimidine) (Fig. 6.2). Figure 6.2.

Detailed explanation-2: -Pyrimidine: A nitrogenous base similar to benzene (a six-membered ring) and includes cytosine, thymine, and uracil as bases used for DNA or RNA.

Detailed explanation-3: -Two nitrogen-containing bases (or nucleotides) that pair together to form the structure of DNA. The four bases in DNA are adenine (A), cytosine (C), guanine (G), and thymine (T). These bases form specific pairs (A with T, and G with C).

Detailed explanation-4: -Three types of nucleobases are pyrimidine derivatives: cytosine(C), thymine(T), and uracil(U).

Detailed explanation-5: -One of two chemical compounds that cells use to make the building blocks of DNA and RNA. Examples of pyrimidines are cytosine, thymine, and uracil.

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