NEET (Zoology MCQs)

Categories: MCQS

Q.1. Choose the incorrect statement.

(1) Corpus luteum secretes large amount of progesterone which is essential for the maintenance of uterine endothelium.

(2) Cyclic menstruation is a sign of normal reproductive phase.

(3) During the menstrual phase, corpus luteum releases progesterone into the blood.

(4) Graafian follicle ruptures due to LH surge.

Ans. (3) During the menstrual phase, corpus luteum releases progesterone into the blood.

Q.2. Statement (A): Melatonin affects the menstrual cycle.

Reason (R): Melatonin plays no role in the regulation of daily rhythm of our body.

(1) Both Statement (A) and Reason (R) are true, and Reason (R) is the correct explanation of Statement (A).

(2) Both Statement (A) and Reason (R) are true, but Reason (R) is not the correct explanation of Statement (A).

(3) Statement (A) is true, and Reason (R) is false.

(4) Statement (A) is false, and Reason (R) is true.

Ans. (3) Statement (A) is true, and Reason (R) is false.

Q.3. Cardiac muscles can be distinguished from skeletal muscles by the presence of all of the following in their fibres, except;

(1) Branching

(2) Communication junctions

(3) Striations

(4) Number of nuclei

Ans. (3) Striations

Q.4. Birds are phylogenetically closer to __X __ than to __Y __.

Identify 'X' and 'Y'.

Ans. (3)

Q.5. Match List-I with List-II and choose the correct option

 A         B          C          D 

            (1)        IV         III          I           II 

            (2)        III          IV         I           II 

            (3)        III          IV         II           I 

            (4)        I           II           III          IV

Ans.     A        B          C          D 

            (2)        III          IV         I           II 

Q.6. Statement I: Short term exposure to dust from stone crushing industries may cause inflammation leading to fibrosis.

Statement II: Chronic damage results in proliferation of fibrous tissue in the lungs.

(1) Both Statement I and Statement II are correct.

(2) Both Statement I and Statement II are incorrect.

(3) Statement I is correct but Statement II is incorrect.

(4) Statement I is incorrect but Statement II is correct.

Ans. (4) Statement I is incorrect but Statement II is correct.

Q.7. Consider the given reaction and select the incorrect option in respect of 'A'.

(1) About 600,000 molecules of carbonic acid are being formed per second using 'A'.

(2) The concentration of 'A' is very high in plasma.

(3) It helps in transporting 70% of CO2 in our body as bicarbonate.

(4) It has accelerated the reaction rate by about 10 million times.

Ans. (2) The concentration of 'A' is very high in plasma.

Q.8. Statement (A): A fall in GFR may activate JG cells to release renin.

Reason (R): Renin may stimulate glomerular blood flow and thus GFR comes back to normal.

(1) Statement (A) and Reason (R) both are true, and Reason (R) is the correct explanation of Statement (A).

(2) Statement (A) and Reason (R) both are true, but Reason (R) is not the correct explanation of Statement (A).

(3) Statement (A) is true, and Reason (R) is false.

(4) Statement (A) is false, and Reason (R) is true.

Ans. (3) Statement (A) is true, and Reason (R) is false.

Q.9. Transgenic specimens exist for;

1. Rheumatoid arthritis
2. Alzheimer's disease
3. Cystic fibrosis

Choose the correct option.

(1) A and B only

(2) B and C only

(3) A and C only

(4) A, B and C

Ans. (4) A, B and C

Q.10. Suppose the terminal ends of an axon are in contact with the dendrites of four adjacent neurons, then the nerve impulse of the axon will;

(1) travel in all the four neurons.

(2) get distributed in all the four neurons resulting in a weak impulse.

(3) travel in only one neuron which is in closest contact and with equal intensity.

(4) does not travel in any neuron as the impulse travels from the dendrite of one neuron to the axon of another neuron.

Ans. (1) travel in all the four neurons.