Biology MCQs

Question 1

What base does guanine pair with?

Accepted Answer

Cytosine

Answer

Adenine

Answer

Thymine

Answer

Uracil

Question 2

Which describes the correct pairing of DNA bases?

Accepted Answer

Guanine - cytosine

Answer

Adenine - cytosine

Answer

Guanine - thymine

Answer

Thymine - cytosine

Question 3

Sex determination of child is done by the chromosome of

Accepted Answer

Father

Answer

Mother

Answer

Both father and mother

Answer

None of these

Question 4

The principle of dominance states that

Accepted Answer

Some alleles are dominant, while others are recessive

Answer

All alleles are recessive

Answer

All alleles are dominant

Answer

Alleles are neither dominant nor recessive

Question 5

Which chemical is not found in DNA nucleotides?

Accepted Answer

Uracil

Answer

Thymine

Answer

Adenine

Answer

All of the above

Question 6

Nitrogenous bases in DNA and RNA?

Accepted Answer

All the above

Answer

Adenine

Answer

Cytosine

Answer

Guanine

Question 7

It is the study of hereditary characters transmitted from parents to offspring.

Accepted Answer

Genetics

Answer

Evolution

Answer

Embryology

Answer

Molecular Biology

Question 8

The inherited traits of an organism are controlled by

Accepted Answer

DNA

Answer

Enzymes

Answer

Nucleotides

Answer

RNA

Question 9

Which chromosomes are identical to each other on the basis of their morphology, position of centromere and other characteristics?

Accepted Answer

Homologous chromosomes

Answer

Autosome chromosomes

Answer

Sex chromosomes

Answer

Heterozygous chromosomes