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. 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 Substrate on the rate of enzymatic reaction Enzyme concentration on its rate of reaction None 2. On plotting a graph between substrate concentration and time, a scientist found a sigmoid curve. The enzyme is Mono enzyme Isozyme Apoenzyme Allosteric None 3. An enzyme which brings about change inside a group without altering the composition is Mutase Isomerase Epimerase Esterase None 4. Enzymes functional in a cell are Inducible only Repressible only Inducible and repressible Inducible, constitutive and repressible None 5. In 1938, Max Perutz a political refugee at Cambridge University published X-ray photograph crystal data for .......... and ........... proteins. Pepsin and papain Haemoglobin and pepsin Myoglobin and haemoglobin Immunoglobulin and haemoglobin None 6. Reverse transcription was discovered by which of the following scientist? Temin and Baltimore Khorana Meischer Watson and Crick None 7. Formation of both peptide and glycosidic bonds involves Dehydration Hydration Esterification Acidification None 8. 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, e b, c, d, e a, b, d a, b, c None 9. The formation of phosphodiester bonds between two nucleotides can be considered as None of the above Anabolic and catabolic Catabolic Anabolic None 10. For RNA-interference, two scientists got Nobel prize in 2006. In which organism these scientists discovered this process? Paragonimus westermani Caenorhabditis elegans Hymenolepis nana Echinococcus granulosus 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 B C E A D D C A B E D A E C B None 12. 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, 2, 3 and 4 2 and 3 1, 3 and 4 None 13. The way enzyme helps a substrate to be attacked by reagent effectively is : enzyme hold the substrate in a suitable position so that it can be attacked by the reagent effectively enzyme react with substrate chemically to convert it into the more reactive form enzyme hold the reagent in a suitable position so that it can be attacked by the substrate effectively none of these None 14. Which of the following is a false statements DNA is chemically less reactive, as compared to RNA. RNA mutate at a faster rate, as compared to DNA. Guanyl transferase enzyme helps in capping process during splicing of hn-RNA. Sweetness index of saccharine is 10,000. None 15. 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. Water Carbon Dioxide Hydrogen Oxygen 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 Lactate dehydrogenase Succinate dehydrogenae Malate dehydrogenase None 17. Which one of the following is an example of an enzyme group called transferase Acetyl Co-A synthetase Fructose biphosphate aldolase Alpha-amylase 3-Phosphoglycerate kinase None 18. In the study of enzymes, a sigmoidal plot of substrate concentration(S) versus the reaction velocity(V) indicates Competitive inhibition Non-Competitive inhibition Michaelis- Menten kinetics Cooperative binding None 19. 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 72 24 12 None 20. Which biomolecule is correctly characteristed? Palmitic acid unsaturated fatty acid with 18 carbon atoms Alanine amino acid contains an amino acid and an acidic group anywhere in the molecule. Adenylic acid adenosine with glucose phosphate molecule Lecithin phosphorylated glyceride found in cell membrane 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.
