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1. Aminoacylation of tRNA is essential for(a) replication of RNA (b) formation of peptide bond (c) splicing (d) elongation of transcription
2. The transgenic plant ‘Flavr Savr’ tomato carries an artificial gene for(a) delayed ripening process (b) longer shelf life (c) enhanced flavour (d) all of these
3. The transgenic plant shows improvement in(a) yield (c) disease resistance (b) quality (d) all of these.
4. A nemotote Meloidogyne incognita infects the root of(a) tobacco (b) cotton (c) pea (d) flax
5. Golden rice should be included in the diet of a person suffering from(a) diabetes (b) night blindness (c) anaemia (d) beri beri.
6. During the processing of the prohormone “proinsulin” into the mature “insulin”(a) C-peptide is added to proinsulin (b) C-peptide is removed from proinsulin (c) B-peptide is added to proinsulin (d) B-peptide is removed from proinsulin.
7. Location and secretion of Leydig’s cells are(a) testis-androgen binding protein (b) epididymis-inhibin (c) testis-testosterone (d) seminal vesicle-LH.
8. ______is a small erectile organ lying at the upper junction of the labia minora.(a) Labia majora(b) Clitoris(c) Mons pubis (d) Vulva
9. Which of the following is the function of ovary?(a) Production of ovum (b) Production of hormones (c) Development of secondary sexual characters (d) All of these
10. Polar bodies are produced during the formation of(a) spermatocytes (b) oogonium (c) primary oocyte (d) secondary oocyte.
11. How many sperms are formed from a secondary spermatocyte?(a) 4 (b) 8 (c) 2 (d) 1
12. Which of the following groups of cells in the male gonad represent haploid cells?(a) Spermatogonial cells (b) Germinal epithelial cells (c) Secondary spermatocytes (d) Primary spermatocytes
13. An oocyte is released from the ovary under the influence of LH(a) after completing meiosis II and before polar bodies are released (b) after completing meiosis I and before release of polar bodies (c) after completing mitosis (d) after completing meiosis I and after release of polar bodies.
14. Site of fertilisation in humans is(a) ampulla isthmus junction of oviduct (b) isthmus uterine part (c) infundibulum ampulla junction of fallopian tube (d) ovary
15. Hormone that prepares and maintains the uterus during pregnancy is produced by(a) corpus albicans (b) corpus luteum (c) Graafian follicle (d) corpora cardiaca.
16. Chemically, RNA is (i) reactive and (ii) stable as compared to DNA.(a) (i) equally, (ii) more (b) (i) less, (ii) more (c) (i) more, (ii) less (d) (i) more, (ii) equally
17. Who among the following performed experiment on Vicia faba?(a) Meselson and Stahl (b) Beadle and Tatum (c) Taylor (d) Nirenberg and Ochoa
18. Telomerase is an enzyme which is a(a) simple protein(b) RNA (c) ribonucleoprotein (d) repetitive DNA
19. During replication of DNA(a) the two daughter molecules develop from both the parental strand (b) RNA functions as template (c) one strand is from parent and one strand is freshly formed in the two daughter molecules (d) one daughter receives both the parental strands while the other daughter receives newly formed strands.
20. Identify the incorrect statement from the following options.(a) The trophoblast layer gets attached to the cervix and leads to implantation. (b) The chorionic villi and uterine become interdigitated with each other and jointly form a structural and functional unit between developing embryo (fetus) and maternal body called placenta. (c) The placenta is connected to the embryo through an umbilical cord. (d) Placenta also acts as an endocrine tissue and produces several hormones like human hCG, hPL, estrogens, progestogens, etc.