NEET (Zoology MCQs)
Categories: Education
Q.1. Which term is used to describe the period when frogs take shelter in deep burrows to protect themselves from extreme heat?
(1) Summer torpor
(2) Hibernation
(3) Dormancy
(4) Migration
Ans. (1) Summer torpor
Q.2. Which of the following organs provides the site for the interaction of mature lymphocytes with antigen.
(1) Bone marrow
(2) Thymus
(3) Lymph nodes
(4) Thyroid
Ans. (3) Lymph nodes
Q.3. Choose the enzyme which converts fibrinogen to fibrin during blood clotting?
(1) Thrombokinase
(2) Prothrombin
(3) Ca2+
(4) Thrombin
Ans. (4) Thrombin
Q.4. Total lung capacity includes how many of the given inspiratory volumes/capacities?
Residual volume, Tidal volume, Expiratory reserve volume, Expiratory reserve volume
(1) 4
(2) 3
(3) 2
(4) 0
Ans. (1) 4
Q.5. A gene locus has two alleles A and a. If the frequency of recessive allele a is 0.4, what will be the frequency of homozygous dominant, heterozygous and homozygous recessive individuals in the population?
(1) 0.36 (AA), 0.48 (Aa), 0.16 (aa)
(2) 0.16 (AA), 0.24 (Aa), 0.36 (aa)
(3) 0.16(AA), 0.48(Aa), 0.36(aa)
(4) 0.16(AA), 0.36(Aa), 0.48(aa)
Ans. (1) 0.36 (AA), 0.48 (Aa), 0.16 (aa)
Q.6. Consider the following.
- Indirect method of gene transfer.
- Suitable for plants.
- Causes tumour.
The above features apply to;
(1) PBR322
(2) Biologics
(3) Retrovirus
(4) Ti plasmid
Ans. (4) Ti plasmid
Q.7. Which of the following is not correct. Functions of thyroid hormones?
(1) Play an important role in regulation of basal metabolic rate.
(2) Affect the maintenance of water and electrolyte balance.
(3) Play no role in protein and fat metabolism.
(4) Support the process of red blood cell formation.
Ans. (3) Play no role in protein and fat metabolism.
Q.8. In male cockroaches, the genital sac is dorsally bounded at the posterior end of the abdomen by;
(1) 9th dorsal and 10th ventral.
(2) 9th ventral and 9th dorsal.
(3) 9th and 10th dorsal.
(4) 9th ventral and 10th dorsal.
Ans. (3) 9th and 10th dorsal.
Q.9. Select the correct match regarding circulatory system in humans
(1) Heart - Mesodermal in origin
(2) Pulmonary vein - Semilunar valve
(3) Pericardium - Single layered membranous sac
(4) Av node - Pacemaker
Ans. (1) Heart - Mesodermal in origin
Q.10. Select the odd one out of the following events involved in the initiation of labour.
(1) Increase in the concentration of oestrogen.
(2) Release of oxytocin from maternal pituitary gland.
(3) Increased secretion of prolactin.
(4) Fetal avulsion reflex.
Ans. (3) Increased secretion of prolactin.