iHKCL | MCQ Practice


Q1 Which structure is involve in gaseous exchange of plants? A. Lenticels B. Cuticle C. All the option are correct D. Stomata 1 0 Correct Answer C
Q2 Photosynthetic prokaryotes lack A. Cell-membrane B. Chloroplast C. Vacuole D. Ribosomes 0 0 Correct Answer B
Q3 Which of the following organ is because of absence of teeth in birds? A. Crop B. Stomach C. Syrinx D. Gizzard 0 0 Correct Answer D
Q4 In which plants leaves are always in whorls? A. Sphenopsids B. Psilopsids C. Pteropsids D. Lycopsids 0 0 Correct Answer A
Q5 In plants, which are involved in testa formation A. Tracheids B. Sclereids C. None of the options are correct D. Sclerenchyma 0 0 Correct Answer B
Q6 Vomiting occurs due to A. Constipation B. Diarrhoea C. Antiperistalsis D. Peristalsis 0 0 Correct Answer C
Q7 In bacterial and viral infection, their is increase in number of --------? A. WBCs B. RBCs C. Platelets D. antibodies 0 0 Correct Answer A
Q8 The enzyme used to form a phosphodiester bond in a nick between a 3?end of one DNA chain and a 5 end of another is A. Restriction Endonuclease B. S1 nuclease C. DNA polymerase D. DNA ligase 0 0 Correct Answer D
Q9 The arrangement of the somatic chromosomes compliment (Karyotype) of a cell in groups of homologous pairs is called A. Nendrogram B. Idiogram C. Phenogram D. Dendrogram 0 0 Correct Answer B
Q10 A radioisotope used to label proteins deferentially from nucleic acid is A. N 15 B. P 32 C. C 14 D. S 35 0 0 Correct Answer D
Q11 Genetic disorders can be treated through gene therapy. The father of gene therapy is A. Khorana B. Galton C. Anderson D. Garrod 0 0 Correct Answer C
Q12 Which of the following statement is correct? A. A collection of clones having recombinant DNA is called gene pool B. Hybrids are often superior to either parent due to homozygosity C. The term hybrid vigour given by Schull is technically Heterosis D. Eugenics is the study of improvement of present generation 0 0 Correct Answer C
Q13 Which one of the following is correct group of DNA histone proteins? A. H2A, H2B, H3, H4 B. H1A, H2B, H3, H4 C. H1, H2, H3, H4 D. H1A, H2B, H3, H4 0 0 Correct Answer D
Q14 Triticale has been developed through intergeneric hybridisation between: A. Wheat and rice B. Wheat and aegilops C. Rice and maize D. Wheat and rye 0 0 Correct Answer D
Q15 Board spectrum antibiotics are? A. Antibiotics having ability to act only on one or two types of pathogenic species covering a board area B. Antibiotics which are active at microorganisms which live in higher in higher range spectrum C. Antibiotics having ability to act only on several pathogenic species differing from each other in structure and composition of their cell wall D. Antibiotics having ability to act ony on particular type of pathogenic species in huge quantity 0 0 Correct Answer C
Q16 Which of the following is the best evidence for the lock and key theory of enzyme action? A. All isolated enzymes have been identified as protein B. Compound similar in stucture to the substrate inhibit the reaction C. Enzymes are found in living organisms and speed up certain reaction D. Enzymes determine the direction of a reaction 0 0 Correct Answer B
Q17 The term feedback refers to A. The effect of end product on the rate of enzymatic reaction B. The effect of substrate on the rate of enzymatic reaction C. The effect of an external compound on the rate of enzymatic reaction D. The effect of enzymes concentration on its reaction. 0 0 Correct Answer D
Q18 Consider the following statements: A. Cholesterol is a structural component of biological membranes B. Sphingolipids at cell surfaces are the sites of biological recognition. Which of the statements given above is/are correct? A. Neither A nor B B. B Only C. Both A and B D. A Only 0 0 Correct Answer C
Q19 Which of the following kinds of substances are present in the cell wall of bacteria? A. D-Glucoronic acid and N-Acetylgalactosamine B. Chitin and pectin C. Amylopectin and cellulase D. N-Acetylglucosamine and N-Acetylmuramic acid 0 0 Correct Answer C
Q20 In their experiment to prove that DNA is the, genetic material, which one of the following isotopes was used by Hershey and Chase to label bacteriophages? A. ³H B. ¹⁴C C. ³²p D. ¹⁵N 0 0 Correct Answer C
Q21 In the context of DNA cloning, consider the following: A. Bacteriophages B. Bacterial artificial chromosomes C. Yeast artificial chromosomes Which of the above is/are cloning vectors? A. A,B and C B. A and B C. B and C D. A Only 0 0 Correct Answer A
Q22 In the context of genetic code, consider the following statements: A. Although an amino acid may have two or more codons, each codon specifies only one amino acid. B. Amino acid codons are identical in human beings, tobacco plants and viruses. Which of the statements given above is/are correct? A. A Only B. B Only C. Both A and B D. Neither A nor B 0 0 Correct Answer B
Q23 In protein synthesis in E. coli. When each amino acid is attached to a specific to RNA at the expense of ATP energy, the ion of which one of the following elements is used? A. Copper B. Calcium C. Magnesium D. Zinc 0 0 Correct Answer C
Q24 With reference to DNA structure as proposed by Watson and Crick, consider the following statements: A. The double helix is right-handed. B. The bases of the two polynucleotides (of differentstrands) are attracted to each other by phosphodiester bonds.Which of the statements given above is/are correct? A. Both A and B B. A Only C. B Only D. Neither A nor B 0 0 Correct Answer D
Q25 Down?s syndrome is caused by an extra A. 18_th Chromosome B. 11_th Chromosome C. 21_st Chromosome D. 22_nd Chromosome 0 0 Correct Answer C
Q26 Down?s syndrome is caused by an extra A. 11^th Chromosome B. 18^th Chromosome C. 21^st Chromosome D. 21^nd Chromosome 0 0 Correct Answer C
Q27 Down?s syndrome is caused by an extra A. 18^th Chromosome B. 21^st Chromosome C. 11^th Chromosome D. 22^nd Chromosome 0 0 Correct Answer B
Q28 In the context of mutations in genetic material, which of the following is an intercalating agent? A. Rifampicin B. Ethidium bromide C. Colchicine D. 5-bromouracil 0 0 Correct Answer B
Q29 The structure of which one of the following inhibitors or protein synthesis is very similar to 3? end of an aminoacyl TRNA? A. Streptomycin B. Puromycin C. Chloramphenicol D. Cycloheximide 0 0 Correct Answer B
Q30 What is the initiation codon in translation? A. UAA B. UGA C. UAG D. AUG 0 0 Correct Answer D
Q31 Which one of the following is the role of a subunit of RNA polymerase? A. Bringing the core enzyme near to the DNA B. Binding the ribonucleotides prior to RNA synthesis C. Recognition of the promotor site D. Catalyzing ribonucleotide joining to the growing RNA chain 0 0 Correct Answer C
Q32 Who of the following is associated with the discovery of bacterial transformation? A. Frederick Griffith B. Thomas Hunt Morgan C. Erwin Chargaff D. Robert Koch 0 0 Correct Answer A
Q33 Consider The following statements: A. The molecular weight of RNA polymerase is greater than that of DNA polymerase-I B. RNA polymerase starts chains without primer whereas DNA polymerase-I starts chains with primer.Which of the statements given above is/are correct? A. B Only B. Both A and B C. Neither A Nor B D. A Only 0 0 Correct Answer B
Q34 For every molecule of NADH₂ that is oxidized via the electron transport system, what is the number of ATPs formed? A. 5 B. 2 C. 3 D. 1 0 0 Correct Answer C
Q35 Consider the following: A. Glycine B. Histamine C. Nitric oxide Which of the above is/are neurotransmitters? A. B and C Only B. A and B Only C. A and C Only D. A, B and C 0 0 Correct Answer D
Q36 The hormones secreted by the hypothalamus in the region of median eminence are carried to adenohypophysis by which one of the following? A. Pituitary stalk B. Hypophyseat portal system C. Neurohypophysis D. Hypophyseal stalk 0 0 Correct Answer B
Q37 Which one of the following vitamins has a role in the formation of collagen? A. Vitamin-A B. Vitamin-C C. Vitamin-B2 D. Vitamin-E 0 0 Correct Answer B
Q38 Consider the following vitamins A. Vitamin-A B. Vitamin-D C. Vitamin-E Which of the above is/are made up of isoprene units ? A. A, B and C B. A and B only C. B and C only D. A and C only 0 0 Correct Answer D
Q39 Among the following conversions in glycolysis, where NADH+H⁺ produced? A. Fructose 1 ,6-biphosphate to glyceraldehyde. 3-phosphate B. Glyceraldehyde 3-phosphate to 1, 3-biphosphoglycerate C. 1, 3-biphosphoglycerate to 3- phosphoglycerate D. Fructose 6-phosphate to fructose, 1, 6 0 0 Correct Answer B
Q40 For each acetyl Co-A oxidized by the citric acid cycle, what is the energy gain? A. Two molecules of NAIDH, one FADH₂ and two nucleoside triphosphate B. Three molecules of NADH, one FADH₂ and one nucleoside triphosphate C. Three molecules of NAPH, one FADH₂ and two nucleoside triphosphate D. Two molecules of NADH, one FADH₂ and one nucleoside triphosphate 0 0 Correct Answer B
Q41 Which one of thHyperthyroidisme following causes tetany in young individuals? A. Hypothyroidism B. Hypoparathyroidism C. Hyperthyroidism D. Hyperparathyroidism 0 0 Correct Answer B
Q42 Consider the following statements: A. The oxidative decarboxylation of pyruvate catalyzed by pyruvate-dehydrogenase complex is areversible oxidation process. B. Four different vitamins required in human nutrition are components of pyruvate dehydrogenasecomplex.Which of the statements given above is/are correct? A. Neither A Nor B B. Both A and B C. A Only D. B Only 0 0 Correct Answer C
Q43 Consider the following statements: A. In carbohydrate metabolism, fructose 1, 6 is convened to fatty acids via acetyl Co-A + EBC 322. B. The liver converts fatty acids to cholesterol IBC 334 Which of the statements given above is/are correct? A. Neither A Nor B B. Both A and B C. A Only D. B Only 0 0 Correct Answer C
Q44 Which one of the following is a steroid hormone? A. Calcitonin B. Somatostatin C. Cortisol D. Glucagon 0 0 Correct Answer C
Q45 What is the role of oxygen in cellular respiration? A. It is utilized in the conversion step of AID to ATP B. It combines with glucose and oxidises it C. It clears lactic acid load D. It is the final electron acceptor in the respiratory chain 0 0 Correct Answer D
Q46 Lactate produced by glycolysis in hypoxic muscle cells is transported via the blood to the liver. The lactose is convened to glucose and then released into the blood. What is this process called? A. Omithine cycle B. Cori cycle C. Glucose-alanine cycle D. HMP-Shunt 0 0 Correct Answer B
Q47 Consider the following statements: A. The double bonds of polyunsaturated fatty acids are almost never conjugated but are separated by methylene group. B. In nearly all naturally occurring unsaturated fatty acids.. The double bonds are in the cis configuration. Which of the statements given above is/are correct? A. A Only B. Both A and B C. B Only D. Neither A nor B 0 0 Correct Answer B
Q48 In the context of biological oxidation reduction reactions, consider the following enzymes: A. Acyl Co-A dehydrogenase B. Glycerol 3-phosphate dehydrogenase C. Succonate dehydrogenase Which of the above enzymes employ flavin nucleotide coenzymes? A. C Only B. A Only C. B Only D. A, B and C 0 0 Correct Answer D
Q49 In the context of comparative study of excretionary system of vertebrates, which one of the following is a special device for water conservation in mammals? A. Collecting duct B. Proximal convoluted tubule C. Bowman?s capsule D. Loop of Henle 0 0 Correct Answer D
Q50 Consider the following statements: A. All enzymes require an additional chemical component called cofactor or coenzyme for their catalytic function. B. The cofactor for pyruvate kinase is K + Which of the statements given above is/are correct? A. Both A and B B. B only C. Neither A Nor B D. A Only 0 0 Correct Answer B
Q51 The Michaelis constant is a measure of which one of the following? A. Concentration of the enzyme B. Catalytic efficiency of the enzyme C. Affinity of the enzyme for its substrate D. Thermo-stability of the enzyme 0 0 Correct Answer C
Q52 Which one of the following is a conjugated protein? A. Plastocyanin B. Chitin C. d Glucosamine D. Amylopectin 0 0 Correct Answer A
Q53 What are the lateral line neuromasts? A. Gustatoreceptors B. Photoreceptors C. Olfactoreceptors D. Rheoreceptors 0 0 Correct Answer D
Q54 Consider the following statements: A. Prosthetic groups in enzymes function as electron acceptors.B. Prosthetic groups bind to the enzyme always by ionic bonds. Which of the statements given above is/are correct? A. Neither A nor B B. A Only C. Both A and B D. B Only 0 0 Correct Answer D
Q55 Consider the following statements: A. Sus has deciduate placenta. B. Talpa has non-deciduate lacenta. Which of the statements given above is/are correct? A. Both A and B B. B Only C. Neither A nor B D. A Only 0 0 Correct Answer C
Q56 Which one of the following acts as a precocious urinary bladder in which nitrogenous waste accumulates during the development of chick? A. Somatopleure B. Allantois C. Yolk Sac D. Amnion 0 0 Correct Answer B
Q57 With reference to gastrulation in chick, consider the following statements: A. In the gastrulation of chick, there is neither invagination nor archenteron.B. The place of origin of endoderm is anterior part of the blasto4erm. Which of the statements given above is/are correct? A. Both A and B B. B Only C. Neither A nor B D. A Only 0 0 Correct Answer C
Q58 With reference to the embryonic development vertebrates, consider the following statements: A. In the chick, the amnion and chorion have no blood vessels.B. There is almost no yolk in mammalian eggs therefore, their embryos have no yolk sac. Which of the statements given above is/are correct? A. B Only B. Neither A nor B C. Both A and B D. A Only 0 0 Correct Answer B
Q59 With reference to sperms and ova of vertebrates, consider the following statements: A. In the spermatozoan, the middle piece containing nucleus and the tail contains mitochondrion B. The mature ovum contains a centriole which later helps the zygote in its division Which of the statements given above is/are correct? A. Neither A for B B. Both A and B C. B Only D. A Only 0 0 Correct Answer C
Q60 Which one of the following is the correct statement? Cortical reaction of egg during fertilization is necessary to A. Allow polyspermy and harden the egg membranes B. Solitbilize the egg membranes C. Inhibit polyspermy and harden the egg membranes D. Inhibit polyspermy and solubilize the egg membranes 0 0 Correct Answer C
Q61 In the context of the evolution of man, who of the following left evidence of artistic ability in the form of drawings paintings on the walls of caves? A. Cro-magnon man B. Neanderthal man C. Peking man D. Java-ape man 0 0 Correct Answer A
Q62 Consider the following geological time periods: A. Cambrian B. Jurassic C. Permian D. Silurian Which one of the following is the correct chronological sequence of the above eological ime periods? A. U?C?A?B B. A?U?C?B C. D-A-C-B D. A?D?B?C 5555 0 0 Correct Answer D
Q63 Human genome contains about ________. A. 10,000 nucleotides B. 6 billion nucleotides C. 10,000 genes D. 6 billion genes 0 0 Correct Answer B
Q64 Common feature of human and insect trachea is A. Non-collapsiable wall B. Ectodermal origin C. Endodermal origin D. Supporting rings 0 0 Correct Answer A
Q65 What is the scientific name of Jelly Fish? A. Actinia B. Madrepore C. Obelia D. Aurelia 0 0 Correct Answer D

biology

Q1 Which structure is involve in gaseous exchange of plants?

Q2 Photosynthetic prokaryotes lack

Q3 Which of the following organ is because of absence of teeth in birds?

Q4 In which plants leaves are always in whorls?

Q5 In plants, which are involved in testa formation

Q6 Vomiting occurs due to

Q7 In bacterial and viral infection, their is increase in number of --------?

Q8 The enzyme used to form a phosphodiester bond in a nick between a 3?end of one DNA chain and a 5 end of another is

Q9 The arrangement of the somatic chromosomes compliment (Karyotype) of a cell in groups of homologous pairs is called

Q10 A radioisotope used to label proteins deferentially from nucleic acid is

Q11 Genetic disorders can be treated through gene therapy. The father of gene therapy is

Q12 Which of the following statement is correct?

Q13 Which one of the following is correct group of DNA histone proteins?

Q14 Triticale has been developed through intergeneric hybridisation between:

Q15 Board spectrum antibiotics are?

Q16 Which of the following is the best evidence for the lock and key theory of enzyme action?

Q17 The term feedback refers to

Q18 Consider the following statements: A. Cholesterol is a structural component of biological membranes B. Sphingolipids at cell surfaces are the sites of biological recognition. Which of the statements given above is/are correct?

Q19 Which of the following kinds of substances are present in the cell wall of bacteria?

Q20 In their experiment to prove that DNA is the, genetic material, which one of the following isotopes was used by Hershey and Chase to label bacteriophages?

Q21 In the context of DNA cloning, consider the following: A. Bacteriophages B. Bacterial artificial chromosomes C. Yeast artificial chromosomes Which of the above is/are cloning vectors?

Q22 In the context of genetic code, consider the following statements: A. Although an amino acid may have two or more codons, each codon specifies only one amino acid. B. Amino acid codons are identical in human beings, tobacco plants and viruses. Which of the statements given above is/are correct?

Q23 In protein synthesis in E. coli. When each amino acid is attached to a specific to RNA at the expense of ATP energy, the ion of which one of the following elements is used?

Q25 Down?s syndrome is caused by an extra

Q26 Down?s syndrome is caused by an extra

Q27 Down?s syndrome is caused by an extra

Q28 In the context of mutations in genetic material, which of the following is an intercalating agent?

Q29 The structure of which one of the following inhibitors or protein synthesis is very similar to 3? end of an aminoacyl TRNA?

Q30 What is the initiation codon in translation?

Q31 Which one of the following is the role of a subunit of RNA polymerase?

Q32 Who of the following is associated with the discovery of bacterial transformation?

Q33 Consider The following statements: A. The molecular weight of RNA polymerase is greater than that of DNA polymerase-I B. RNA polymerase starts chains without primer whereas DNA polymerase-I starts chains with primer.Which of the statements given above is/are correct?

Q34 For every molecule of NADH2 that is oxidized via the electron transport system, what is the number of ATPs formed?

Q35 Consider the following: A. Glycine B. Histamine C. Nitric oxide Which of the above is/are neurotransmitters?

Q36 The hormones secreted by the hypothalamus in the region of median eminence are carried to adenohypophysis by which one of the following?

Q37 Which one of the following vitamins has a role in the formation of collagen?

Q38 Consider the following vitamins A. Vitamin-A B. Vitamin-D C. Vitamin-E Which of the above is/are made up of isoprene units ?

Q39 Among the following conversions in glycolysis, where NADH+H+ produced?

Q40 For each acetyl Co-A oxidized by the citric acid cycle, what is the energy gain?

Q41 Which one of thHyperthyroidisme following causes tetany in young individuals?

Q43 Consider the following statements: A. In carbohydrate metabolism, fructose 1, 6 is convened to fatty acids via acetyl Co-A + EBC 322. B. The liver converts fatty acids to cholesterol IBC 334 Which of the statements given above is/are correct?

Q44 Which one of the following is a steroid hormone?

Q45 What is the role of oxygen in cellular respiration?

Q46 Lactate produced by glycolysis in hypoxic muscle cells is transported via the blood to the liver. The lactose is convened to glucose and then released into the blood. What is this process called?

Q48 In the context of biological oxidation reduction reactions, consider the following enzymes: A. Acyl Co-A dehydrogenase B. Glycerol 3-phosphate dehydrogenase C. Succonate dehydrogenase Which of the above enzymes employ flavin nucleotide coenzymes?

Q49 In the context of comparative study of excretionary system of vertebrates, which one of the following is a special device for water conservation in mammals?

Q50 Consider the following statements: A. All enzymes require an additional chemical component called cofactor or coenzyme for their catalytic function. B. The cofactor for pyruvate kinase is K + Which of the statements given above is/are correct?

Q51 The Michaelis constant is a measure of which one of the following?

Q52 Which one of the following is a conjugated protein?

Q53 What are the lateral line neuromasts?

Q54 Consider the following statements: A. Prosthetic groups in enzymes function as electron acceptors.B. Prosthetic groups bind to the enzyme always by ionic bonds. Which of the statements given above is/are correct?

Q55 Consider the following statements: A. Sus has deciduate placenta. B. Talpa has non-deciduate lacenta. Which of the statements given above is/are correct?

Q56 Which one of the following acts as a precocious urinary bladder in which nitrogenous waste accumulates during the development of chick?

Q57 With reference to gastrulation in chick, consider the following statements: A. In the gastrulation of chick, there is neither invagination nor archenteron.B. The place of origin of endoderm is anterior part of the blasto4erm. Which of the statements given above is/are correct?

Q58 With reference to the embryonic development vertebrates, consider the following statements: A. In the chick, the amnion and chorion have no blood vessels.B. There is almost no yolk in mammalian eggs therefore, their embryos have no yolk sac. Which of the statements given above is/are correct?

Q60 Which one of the following is the correct statement? Cortical reaction of egg during fertilization is necessary to

Q61 In the context of the evolution of man, who of the following left evidence of artistic ability in the form of drawings paintings on the walls of caves?

Q62 Consider the following geological time periods: A. Cambrian B. Jurassic C. Permian D. Silurian Which one of the following is the correct chronological sequence of the above eological ime periods?

Q63 Human genome contains about ________.

Q64 Common feature of human and insect trachea is

Q65 What is the scientific name of Jelly Fish?

Q34 For every molecule of NADH₂ that is oxidized via the electron transport system, what is the number of ATPs formed?

Q39 Among the following conversions in glycolysis, where NADH+H⁺ produced?