Tiêu đề K-2820 (Life Science) (Paper II).pdf ✅

Paper : II Subject : Life Sciences Subject Code : 28 Roll No. OMR Sheet No. : ____________________ Name & Signature of Invigilator/s Signature : _________________________________ Name : _________________________________ Time : 2 Hours Maximum Marks : 200 Number of Pages in this Booklet : 16 Number of Questions in this Booklet : 100 K – 2820 1 ±Üâ.£.®æãà./P.T.O. Instructions for the Candidates 1. Write your roll number in the space provided on the top of this page. 2. This paper consists of Hundred multiple-choice type of questions. 3. At the commencement of examination, the question booklet will be given to you. In the first 5 minutes, you are requested to open the booklet and compulsorily examine it as below : (i) To have access to the Question Booklet, tear off the paper seal on the edge of the cover page. Do not accept a booklet without sticker seal or open booklet. (ii) Tally the number of pages and number of questions in the booklet with the information printed on the cover page. Faulty booklets due to pages/questions missing or duplicate or not in serial order or any other discrepancy should be got replaced immediately by a correct booklet from the invigilator within the period of 5 minutes. Afterwards, neither the Question Booklet will be replaced nor any extra time will be given. 4. Each item has four alternative responses marked (A), (B), (C) and (D). You have to darken the circle as indicated below on the correct response against each item. Example : A B C D where (C) is the correct response. 5. Your responses to the questions are to be indicated in the OMR Sheet kept inside this Booklet. If you mark at any place other than in the circles in the OMR Sheet, it will not be evaluated. 6. Read the instructions given in OMR carefully. 7. Rough Work is to be done in the end of this booklet. 8. If you write your name or put any mark on any part of the OMR Answer Sheet, except for the space allotted for the relevant entries, which may disclose your identity, you will render yourself liable to disqualification. 9. You have to return the OMR Answer Sheet to the invigilators at the end of the examination compulsorily and must not carry it with you outside the Examination Hall. 10. You can take away question booklet and carbon copy of OMR Answer Sheet after the examination. 11. Use only Blue/Black Ball point pen. 12. Use of any calculator, electronic gadgets or log table etc., is prohibited. 13. There is no negative marks for incorrect answers. 14. In case of any discrepancy found in the Kannada translation of a question booklet the question in English version shall be taken as final. A»Ü¦ìWÜÚWæ ÓÜãaÜ®æWÜÙÜá 1. D ±Üâo ̈Ü ÊæáàÆᤩ¿áÈÉ J ̈ÜXÔ ̈Ü ÓܧÙÜ ̈ÜÈÉ ̄ÊÜá3⁄4 ÃæãàÇ... ®ÜíŸÃÜ®Üá° ŸÃæÀáÄ. 2. 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Paper II 2 K – 2820 Total Number of Pages : 16 Life Sciences Paper – II Note : This paper contains Hundred (100) objective type questions. Each question carries two (2) marks. All questions are compulsory. 1. The constituent monosaccharide in chitin is (A) D-Glucose (B) D-Xylose (C) N-acetyl D-glucosamine (D) D-Galactose 2. An example for aromatic amino acid is (A) Methionine (B) Valine (C) Alanine (D) Tyrosine 3. Which functional group is never found in alpha amino acids ? (A) NH2 (B) COOH (C) CHO (D) S-CH3 4. Ramachandran plot displays (A) Allowed angles of Phi and Psi for polypeptide backbone (B) Preferred amino acids in a helix (C) The hydropathy of amino acids (D) Angles of rotation of R-group of amino acids 5. Left-handed helix is found in (A) B-DNA (B) A-DNA (C) C-DNA (D) Z-DNA 6. pH = pK, when (A) [Proton acceptor] = 1/2[Proton donor] (B) [Proton acceptor] = [Proton donor] (C) [Proton acceptor] = 2[Proton donor] (D) 2[Proton acceptor] = [Proton donor] 7. Match the following with reference to protein structure and modifying reagents. Column A Column B i. Mercapto ethanol a. Peptide bond ii. Guanidine b. Disulphide hydrochloride bridge iii. Urea c. Hydrogen bond iv. Dithiothreitol d. Ionic bond (A) i - a, ii - d, iii - b, iv - c (B) i - b, ii - c, iii - c, iv - b (C) i - c, ii - b, iii - a, iv - d (D) i - d, ii - a, iii - c, iv - a
K – 2820 3 Paper II Total Number of Pages : 16 8. Match the column A consisting of different vitamins with their names in column B Column A Column B a. Vitamin D i. Tocopherol b. Vitamin E ii. Thiamine c. Vitamin B6 iii. Pyridoxine d. Vitamin B1 iv. Calciferol (A) a - (i), b - (ii), c - (iii), d - (iv) (B) a - (i), b - (ii), c - (iv), d - (iii) (C) a - (iv), b - (i), c - (iii), d - (ii) (D) a - (iv), b - (i), c - (ii), d - (iii) 9. Where are the ion carriers located in a cell ? (A) Cell membranes (B) Intercellular spaces (C) Cell wall (D) Nucleus 10. Which of the following cell organelle contain DNA ? (A) Golgi complex (B) Endoplasmic reticulum (C) Ribosome (D) Mitochondria 11. In which of the following organelles β-oxidation of long chain fatty acids is initiated with an object of shortening the chain length ? (A) Lysosomes (B) Peroxisomes (C) Microsomes (D) Golgi 12. The cell division, which consists of nuclear division (mitosis) followed by cytoplasmic division (cytokinesis) occurs during (A) G1 phase (B) S phase (C) G2 phase (D) M phase 13. Which of the following pair matches with membrane transport process and its primary function ? (A) Exocytosis – the movement of macromolecules into the cell (B) Pinocytosis – the uptake of water and solutes into the cell (C) Osmosis – passive diffusion of small solutes (D) Phagocytosis - secretion of large particles from the cell 14. The core of the nucleosome consists of (A) H1 , H2 A, H2 B, H4 (B) H2 A, H2 B, H3 , H4 (C) H1 , H2 A, H2 B, H3 (D) H1 , H2 A, H3 , H4 15. The concept of pH homeostasis is (A) The ability of the microbe to control its internal pH (B) The ability of the microbe to control its external pH (C) The ability of the microbe to grow on acidic pH (D) The ability of the microbe to grow on alkaline pH
Paper II 4 K – 2820 Total Number of Pages : 16 16. A metabolic pathway that involves part of the Kreb’s cycle plus two unique enzymes, malate synthetase and isocitrate lyase is (A) Glyoxylate cycle (B) Glycolate pathway (C) Calvin cycle (D) TCA cycle 17. The maximum coiling of the chromosomes is observed during (A) Pachytene of meiosis (B) Metaphase of mitosis (C) Anaphase of meiosis I (D) Telophase of meiosis II 18. During replication, the long strands of DNA in a cell’s nucleus get tangled making it harder for a cell to read genes. But ______ enzyme can prevent tangling. (A) DNA ligase (B) DNA replicase (C) DNA topoisomerase (D) DNA isomerase 19. Which of the following are the non-coding RNAs ? (A) rRNA, miRNA and mRNA (B) rRNA, tRNA and mRNA (C) miRNA, tRNA and mRNA (D) rRNA, miRNA and tRNA 20. In the final step of protein synthesis, the folding of many proteins is made more efficient by a special class of protein called (A) Gag-Pol fusion protein (B) Protease (C) Chaperone (D) Ubiquitin 21. Which of the following process takes place in the 3′ – 5′ direction ? (A) RNA editing (B) RNA replication (C) DNA replication (D) RNA splicing 22. In eukaryotic cells, the tRNA genes 5s, rRNA genes, some snRNA genes and genes for other small RNAs are transcribed by (A) RNA polymerase I (B) RNA polymerase II (C) RNA polymerase III (D) Reverse Transcriptase 23. The role of gRNA is (A) Chemical modification of rRNA (B) Self splicing (C) Polyadenylation (D) RNA editing