Biology MCQs FOR UPSC(NDA/NA) Exam, SET 3

 Biology MCQs FOR UPSC(NDA/NA) Exam

UPSC NDA/NA BIOLOGY MCQ Q.1

Which one among the following hormones stimulates the plant cells to grow in a manner such that the plant appears to be bent towards light?

(A) cytokinin

(B) auxin

(C) gibberellin

(D) abscissic acid

Ans.(B)

UPSC NDA/NA BIOLOGY MCQ Q.2

The complete digestion of carbohydrates, proteins and fats occurs in

(A) stomach

(B) liver

(C) small intestine

(D) large intestine

Ans.(C)

UPSC NDA/NA BIOLOGY MCQ Q.3

The sex of a newborn baby is determined by the chromosomes inherited from

(A) the mother

(B) the father

(C) mothers mother

(D) fathers father

Ans.(B)

UPSC NDA/NA BIOLOGY MCQ Q. 4

Magnetic Resonance Imaging (MRI) is used in medical diagnosis to obtain images of the internal body organs. This is primarily because

(A) Our body possesses a permanent magnet

(B) MRI uses an external magnet to generate a magnetic field in the body

(C) MRI uses an external field to generate a magnetic field in the body

(D) ions' motion along our nerve cells generates magnetic fields

Ans.(D)

UPSC NDA/NA BIOLOGY MCQ Q.5

The fruits of the coconut and the mango are

(A) pome

(B) beri

(C) drup

(D) hesperideum

Ans.(C)

UPSC NDA/NA BIOLOGY MCQ Q.6

Consider the following diseases

1. Cholera

2. Tuberculosis

3. Filaria

4. Typhoid

Which of the above diseases is caused by bacteria?

(A) 1 and 3

(B) 2 and 4

(C) 1,3 and 4

(D) 1, 2 and 4

Ans.(D)

UPSC NDA/NA BIOLOGY MCQ Q.7

Which of the following statements about sexual reproduction in flowering plants are correct?

(A) The stamen is present in the centre of a flower

(B) The stamen produces pollen grains.

(C) The swollen bottom part of the carpel is the ovary.

(D) The fusion of germ cells gives rise to a zygote

Select the correct answer using the codes given below.

(A) 2,3, and 4

(B) 2 and 4

(C) 1 and 3

(D) all of these

Ans.(A)

UPSC NDA/NA BIOLOGY MCQ Q.8

Which one among the following parts of blood carries out the function of body defence?

(A) platelets

(B) white blood cells

(C) haemoglobin

(D) red blood cells

Ans.(B)

UPSC NDA/NA BIOLOGY MCQ Q.9

Which one among the following is not included in the major clinical signs as a case definition of AIDS in children less than 12 years of age?

(A) persistent cough for more than 1 month

(B) loss of weight

(C) chronic diarrhoea

(D) prolonged fever

Ans.(A)

UPSC NDA/NA BIOLOGY MCQ Q.10

Polio disease is caused by

(A) bacteria

(B) fungi

(C) virus

(D) worm

Ans.(C)