Class 11-Biology-chapter 9-Biomolecules InstructionTotal Questions : 20Total time :20 minTotal Marks : 20 x 3 = 60 MarksEach Correct Question carries : 3 MarksEach incorrect Question Carries : -1 MarksEach Unattempted Question carry : 0 MarksBe careful On Negative Markings 1. For RNA-interference, two scientists got Nobel prize in 2006. In which organism these scientists discovered this process? Paragonimus westermani Echinococcus granulosus Hymenolepis nana Caenorhabditis elegans None 2. In the study of enzymes, a sigmoidal plot of substrate concentration(S) versus the reaction velocity(V) indicates Cooperative binding Competitive inhibition Michaelis- Menten kinetics Non-Competitive inhibition None 3. In 1938, Max Perutz a political refugee at Cambridge University published X-ray photograph crystal data for .......... and ........... proteins. Immunoglobulin and haemoglobin Haemoglobin and pepsin Pepsin and papain Myoglobin and haemoglobin None 4. The way enzyme helps a substrate to be attacked by reagent effectively is : enzyme react with substrate chemically to convert it into the more reactive form enzyme hold the substrate in a suitable position so that it can be attacked by the reagent effectively none of these enzyme hold the reagent in a suitable position so that it can be attacked by the substrate effectively None 5. On plotting a graph between substrate concentration and time, a scientist found a sigmoid curve. The enzyme is Allosteric Isozyme Mono enzyme Apoenzyme None 6. When hydrogen peroxide is applied on the wound as a disinfectant, there is frothing at the site of injury. which is due to the presence of an enzyme in the skin that uses hydrogen peroxide as a substrate to produce. Oxygen Carbon Dioxide Water Hydrogen None 7. Which biomolecule is correctly characteristed? Lecithin phosphorylated glyceride found in cell membrane Palmitic acid unsaturated fatty acid with 18 carbon atoms Adenylic acid adenosine with glucose phosphate molecule Alanine amino acid contains an amino acid and an acidic group anywhere in the molecule. None 8. Formation of both peptide and glycosidic bonds involves Dehydration Esterification Acidification Hydration None 9. The formation of phosphodiester bonds between two nucleotides can be considered as Anabolic and catabolic None of the above Anabolic Catabolic None 10. Which of the following elements are present in all proteins?1. Carbon2. Hydrogen3. Oxygen4. NitrogenSelect the correct answer from the codes given below. 1, 2 and 3 1, 3 and 4 2 and 3 1, 2, 3 and 4 None 11. Arrange the following compounds in descending order on the basis of number of carbon atoms present in them.(A) Palmitic acid (B) Serine (C) Ribose (D) Arachidoric acid (E) Glucose C B A D E D C A B E B C E A D D A E C B None 12. Which one of the following is an example of an enzyme group called transferase 3-Phosphoglycerate kinase Acetyl Co-A synthetase Alpha-amylase Fructose biphosphate aldolase None 13. Enzymes functional in a cell are Inducible only Repressible only Inducible and repressible Inducible, constitutive and repressible None 14. An enzyme which brings about change inside a group without altering the composition is Esterase Isomerase Epimerase Mutase None 15. A test tube contains 4000 substrate moles along with its corresponding enzyme whose TON is 20. After 10 minutes if 40% of the substrate is left in the test tube, then how many enzyme molecules are involved in the reaction? 400 12 24 72 None 16. All enzymes of TCA cycle are located in the mitochondrial matrix except one which is located in inner mitochondrial membranes in eukaryotes and in cytosol in prokaryotes. This enzyme is? Isocitrate dehydrogenase Malate dehydrogenase Lactate dehydrogenase Succinate dehydrogenae None 17. Which of the following statements are true?(a) Proteins are the heteropolymer of 𝛼α-amino acid.(b) Sugar found in nucleic acid, is in the form of 𝛽β-form.(c) Nucleic acids show acidic nature.(d) 5-methyl uracil binds with the first carbon atom of the ribose sugar.(e) Collagen is the most abundant protein in the plant world. a, b, d a, b, c a, b, e b, c, d, e None 18. The term feedback refers to the effect of An external compound on the rate of enzymatic reaction End product on the rate of enzymatic reaction Enzyme concentration on its rate of reaction Substrate on the rate of enzymatic reaction None 19. Which of the following is a false statements DNA is chemically less reactive, as compared to RNA. Guanyl transferase enzyme helps in capping process during splicing of hn-RNA. Sweetness index of saccharine is 10,000. RNA mutate at a faster rate, as compared to DNA. None 20. Reverse transcription was discovered by which of the following scientist? Temin and Baltimore Khorana Watson and Crick Meischer None Please Share This Share this content Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Leave a Reply Cancel replyCommentEnter your name or username to commentEnter your email address to commentEnter your website URL (optional) Save my name, email, and website in this browser for the next time I comment.