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1. In maize seed, the layer separating the endosperm from the embryo is rich in
2. The cell wall of Chlamydomonas is made up of:(a) hemicellulose (b) proteins (c) glycoproteins(d) both (b) and (c)
3. The function of the cambium in a plant is:(a) water absorption (b) lateral growth (c) food storage (d) photosynthesis
4. The primary function of the cuticle on the surface of leaves is:(a) exchange of gases (b) protection (c) water retention (d) nutrient absorption
5. Which of the following cell organelle contains hydrolytic enzymes?(a) Ribosome (b) Mesosome (c) Lysosome (d) Microsome
6. Which one of the following is not true regarding the release of energy during ATP synthesis through chemiosmosis? It involves:a) reduction of NADP to NADPH2 on the stroma side of the membrane. b) breakdown of proton gradient. c) breakdown of electron gradient. d) movement of protons across the membrane to the stroma
7. Which of the following is the process of respiration that involves the breakdown of fatty acids to generate ATP?(a) Glycolysis (b) B-oxidation (c) Fermentation (d) Kreb’s cycle
8. What is the role of large bundle sheath cells found around the vascular bundles in C4 plants?a) To protect the vascular tissue from high light intensity. b) To provide the site for photorespiratory pathway. c) To increase the number of chloroplast for the operation of Calvin cycle. d) To enable the plant to tolerate high temperature
9. What is a fat molecule made ofa) One glycerol and one fatty acid molecule b) One glycerol and three fatty acid molecules c) Three glycerol and three fatty acid molecules d) Three glycerol molecules and one fatty acid molecules
10. Phosphoglyceride is made up ofa) A saturated or unsaturated fatty acid esterified to a glycerol molecule to which a phosphate group is also attached b) Only a saturated fatty acid esterified to a glycerol molecule to which a phosphate group is also attached c) Only an unsaturated fatty acid esterified to a glycerol molecule to which a phosphate group is also attached d) A saturated or unsaturated fatty acid esterified to a phosphate group, which is also attached to a glycerol molecule
11. Which fatty acid can detect spoilage of oil(a) Oleic acid (b) Linoleic acid (c) Erucic acid (d) Linolenic acid
12. Given below are two statements. Statement I: A protein can be visualized as a line, with the left end representing the first amino acid (C-terminal) and the right end representing the last amino acid (N-terminal). Statement II: Adult human haemoglobin is composed of four subunits: two alpha (α) subunits and two beta (β) subunits In the light of the above statements, choose the correct answer from the options given below.a) Both statement I and statement II are false b) Statement I is true, but statement II is falsec) Statement I is false, but statement II is true d) Both statement I and statement II are true
13. Which of the following is least likely to be involved in stabilising the three-dimensional folding of most proteins(a) Ester bonds (b) Hydrogen bonds (c) Electrostatic interaction (d) Hydrophobic interaction
14. Which two functional groups are typical of sugars?(a) Carbonyl and phosphate (b) Carbonyl and methyl (c) Hydroxyl and methyl (d) Carbonyl and hydroxyl
15. The chitinous exoskeleton of arthropods is formed by the polymerisation ofa) keratin sulphate and chondroitin sulphate b) D-glucosamine c) N-acetyl glucosamine d) lipoglycans
(a) NAD+(b) ATP(c) Glyceraldehyde 3 phosphate(d) Molecular oxygen