NEET (Zoology MCQs)
Categories: MCQ
Q.1. Most of the major organ systems in humans are formed in the developing embryo by the end of;
(1) 4th week of pregnancy.
(2) First trimester.
(3) 20th week of pregnancy.
(4) Second trimester.
Ans. (2) First trimester.
Q.2. Statement I: In RNAi, genes are silenced using dsRNA.
Statement II: Transgenic mice are used in polio vaccine production.
(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. (3) Statement I is correct but Statement II is incorrect.
Q.3. All of the following are true for dense irregular connective tissue except;
(1) It contains fibroblasts
(2) The filaments are mostly elastin
(3) The filaments are differently oriented
(4) It is present in the skin
Ans. (2) The filaments are mostly elastin
Q.4. All of the following are side effects of various contraceptive methods except;
(1) Irregular menstrual bleeding.
(2) Breast cancer.
(3) Osteoarthritis.
(4) Nausea.
Ans. (3) Osteoarthritis.
Q.5. Which of the following statements is not true?
(1) The entire heart is made up of cardiac muscles.
(2) The SAN is present in the right upper corner of the right atrium.
(3) The aorta carries oxygenated blood.
(4) The tricuspid valve is also called the mitral valve.
Ans. (4) The tricuspid valve is also called the mitral valve.
Q.6. Select the incorrect match.
(1) 70% of CO2 - transported as bicarbonate
(2) Asthma - reduced respiratory surface
(3) Oxygen dissociation curve - sigmoid in shape
(4) Occupational respiratory disorders - proliferation of fibrous tissues
Ans. (2) Asthma - reduced respiratory surface
Q.7. Apart from Ori, vectors require a selectable marker because it helps in;
(1) identifying and eliminating transformants.
(2) selectively allowing the growth of transformants.
(3) Protein synthesis involved in replication of plasmids.
(4) Antibiotic selection using non-recombinants.
Ans. (2) selectively allowing the growth of transformants.
Q.8. The process where a single ancestral species rapidly diversifies into different forms, each of which is adapted to a specific ecological niche is called;
(1) Adaptive radiation.
(2) Co-evolution.
(3) Adaptive convergence.
(4) Convergent evolution.
Ans. (1) Adaptive radiation.
Q.9. The drug which is mainly known for its effect on the cardiovascular system of the body is obtained from;
(1) Papaver somniferum.
(2) Cannabis sativa.
(3) Atropa belladonna.
(4) Erythroxylum coca.
Ans. (2) Cannabis sativa.
Q.10. Which of the following belongs to the second largest phylum of the animal kingdom?
(1) Octopus
(2) Laccifer
(3) Hirudinaria
(4) Echinus
Ans. (1) Octopus