NEET (Zoology MCQs)
Categories: OTHERS
Q.1. What is the process of introducing foreign DNA into the cells of an organism called?
(1) Translocation
(2) Conversion
(3) Transfer
(4) Transcription
Ans. (2) Conversion
Q.2. Choose the feature from the options given below which is correct for alveoli.
(1) Vascular sac like structures.
(2) The cells are multilayered in appearance.
(3) Presence of branched muscle fibres.
(4) Absence of blood vessels and basement membrane.
Ans. (1) Vascular sac like structures.
Q.3. Assertion (A): During pregnancy, the levels of several hormones such as oestrogens, progestogens, cortisol, prolactin, thyroxine etc. increase several folds in maternal blood.
Reason (R) : The increased production of these hormones is essential for the growth of the foetus, metabolic changes in the mother and maintenance of pregnancy.
(1) Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A).
(2) Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A).
(3) Assertion (A) is true and Reason (R) is false.
(4) Assertion (A) is false and Reason (R) is true.
Ans. (1) Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A).
Q.4. Assertion (A): The cardiac output of a runner will be much higher than that of a normal person.
Reason (R): The heart beat of a normal person is lower than that of a runner.
(1) Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A).
(2) Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A).
(3) Assertion (A) is true and Reason (R) is false.
(4) Assertion (A) is false and Reason (R) is true.
Ans. (3) Assertion (A) is true and Reason (R) is false.
Q.5. Which of the following is connected through cartilage and allows limited movement?
(1) Adjacent vertebrae in the vertebral column
(2) Humerus and pectoral girdle
(3) Atlas and axis
(4) Bones of the skull
Ans. (1) Adjacent vertebrae in the vertebral column
Q.6. Which of the following statements is correct?
(1) Spermicidal creams, jellies and foams are commonly used along with IUDs to enhance contraceptive efficiency.
(2) Tubectomy is an ideal method of contraception to delay pregnancy.
(3) Condoms are a barrier method that can be used by women.
(4) Oral contraceptive pills alter the quality of cervical mucus to prevent/retard the penetration of sperms.
Ans. (4) Oral contraceptive pills alter the quality of cervical mucus to prevent/retard the penetration of sperms.
Q.7. Read the following statements.
- Metagenesis is observed in helminths.
- Unitociderms are triploblastic and cavitary animals.
- Roundworms have organ-system level of body organisation.
- Comb plates present in ctenophores help in digestion.
- Water vascular system is characteristic of unitinoderms.
Choose the correct answer from the options given below.
(1) A, D and E are correct
(2) B, C and E are correct
(3) C, D and E are correct
(4) A, B and C are correct
Ans. (2) B, C and E are correct
Q.8. Read the following statements carefully and choose the option containing only correct statements.
- Spermatogonia produce sperm cells by spermiogenesis which begins at puberty.
- All spermatogonia undergo meiosis periodically.
- A primary spermatocyte completes the first meiotic division during embryonic development.
- Secondary spermatocytes have only 23 chromosomes.
(1) A and B
(2) B and C
(3) C and D
(4) A and D
Ans. (4) A and D
Q.9. Statement I: In female cockroach, the anterior end of the brood contains the genital pore, seminal pore and phallic gland.
Statement II: In males, the genital sac situated at the posterior end of the abdomen contains the dorsal anus, the ventrally male genital pore and the gonapophysis.
(1) Both Statement I and Statement II are correct.
(2) Statement I is correct but Statement II is incorrect.
(3) Statement I is incorrect but Statement II is correct.
(4) Both Statement I and Statement II are incorrect.
Ans. (3) Statement I is incorrect but Statement II is correct.
Q.10. Assertion (A): In autofluorescence imaging, the clone with the non-mutated gene will not appear on photographic film.
Reason (R): The probe lacks complementation with the mutated gene.
(1) Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A).
(2) Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A).
(3) Assertion (A) is true and Reason (R) is false.
(4) Assertion (A) is false and Reason (R) is true.
Ans. (4) Assertion (A) is false and Reason (R) is true.