Biology questions and answers

Biology Questions and Answers

How well do you understand living things and their vital processes? Whether you are preparing for JAMB, WAEC, NECO and Post-UTME, these Biology past questions and answers cover such subjects as the chemistry of life, botany, evolution, genetics, ecology etc to help you know what to expect, improve your speed and confidence and be really prepared for the actual aptitude test.

1,721.

In a case of complete dominance, what is the phenotypic ratio of the cross Bb X Bb; where B =black and b = white?

A.

1 black : 1 grey : 2 whites

B.

1 black : 3 whites

C.

1 black : 2 blues : 1 white

D.

3 blacks : 1 white

Correct answer is D

No explanation has been provided for this answer.

1,722.

In the structure of DNA, which of the following statements is true?

A.

The double helix are held together by covalent bonds

B.

Nucleotide is made up of ribose, phosphate and an organic nitrogen compound

C.

Guanine is the opposite of cytosine

D.

Adenine is the opposite of cytosine

Correct answer is C

No explanation has been provided for this answer.

1,723.

Two plants with red flowers were back crossed, which of the following results indicate that the plants are heterozygous red flowers, where red flowers are dominant?

A.

75% red and 25% white

B.

50% red and 50% white

C.

100% white

D.

100% red

Correct answer is A

No explanation has been provided for this answer.

1,724.

Which of the following diseases is transmittable through genes?

A.

HIV /AIDS

B.

Sickle cell anaemia

C.

Diabetes

D.

Presbyopia

Correct answer is B

No explanation has been provided for this answer.

1,725.

The classes of fingerprints in man are

A.

whorl, alternate, opposite and compound

B.

compound, loop, whorl! and alternate

C.

whorl, arch, compound and loop

D.

arch, simple, compound and opposite

Correct answer is C

No explanation has been provided for this answer.