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3 questions

Match List I with List II :List I:A. α-1 antitrypsinB. Cry IAbC. Cry IAcD. Enzyme replacement therapyList II:I. Cotton bollwormII. ADA deficiencyIII. EmphysemaIV. Corn borerChoose the correct answer from the options given below : Answer: 4. A-III, B-IV, C-I, D-II Key idea: link each biotech product or therapy with its use. α-1 antitrypsin - treats emphysema (III). Cry... Applications in health: human insulin, vaccines, gene therapy 1 answer
Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R :Assertion A : FSH acts upon ovarian follicles in female and Leydig cells in male.Reason R : Growing ovarian follicles secrete estrogen in female wh… Answer: 1. A is false but R is true Key idea: check the target cells of FSH. In females FSH acts on ovarian follicles. In males FSH acts on... Gametogenesis: spermatogenesis and oogenesis 1 answer
Match List I with List II :List I:A. CocaineB. HeroinC. MorphineD. MarijuanaList II:I. Effective sedative in surgeryII. Cannabis sativaIII. ErythroxylumIV. Papaver somniferumChoose the correct answer from the options given below : Answer: 1. A-III, B-IV, C-I, D-II Cocaine comes from Erythroxylum coca (A-III). Heroin (smack) is made from morphine, which comes from Papav... Adolescence, drug, alcohol and tobacco abuse 1 answer
Match List I with List II :List I:A. LipaseB. NucleaseC. ProteaseD. AmylaseList II:I. Peptide bondII. Ester bondIII. Glycosidic bondIV. Phosphodiester bondChoose the correct answer from the options given below : Answer: 4. A-II, B-IV, C-I, D-III Key idea: each enzyme breaks a particular bond. Lipase - ester bond in fats (II). Nuclease - phosphodieste... Enzymes: types, properties, action, classification 1 answer
Three types of muscles are given as a, b and c. Identify the correct matching pair along with their location in human body :Name of muscle/location Answer: 3. (a) Skeletal - Triceps; (b) Smooth - Stomach; (c) Cardiac - Heart. Key idea: identify the tissue from the drawing, then its locat... Animal tissues: epithelial, connective, muscular, neural 1 answer
List of endangered species was released by- Answer: 1. IUCN Key idea: the IUCN (International Union for Conservation of Nature) publishes the Red List of threatened species. GEAC appro... Biodiversity conservation: hotspots, Red Data Book, biosphere reserves, national parks, sacred groves 1 answer
A pink flowered Snapdragon plant was crossed with a red flowered Snapdragon plant. What type of phenotype/s is/are expected in the progeny? Answer: 3. Red flowered as well as pink flowered plants Key idea: Snapdragon shows incomplete dominance: RR is red, Rr is pink, rr is white.... Deviations: incomplete dominance, co-dominance, multiple alleles, blood groups, pleiotropy, polygenic inheritance 1 answer
Which of the following are required for the dark reaction of photosynthesis?A. LightB. ChlorophyllC. CO_2D. ATPE. NADPHChoose the correct answer from the options given below: Answer: 4. C, D and E only Key idea: the dark (biosynthetic) reaction uses the ATP and NADPH made in the light reaction, together with CO₂ .... C3 and C4 pathways, photorespiration 1 answer
The lactose present in the growth medium of bacteria is transported to the cell by the action of: Answer: 4. Permease Key idea: in the lac operon, permease carries lactose into the cell. The lac operon has three structural genes: z codes... Gene regulation: lac operon 1 answer
Identify the type of flowers based on the position of calyx, corolla and androecium with respect to the ovary from the given figures (a) and (b) Answer: 1. (a) Perigynous; (b) Perigynous Key idea: the position of the thalamus and the other whorls decides hypogynous, perigynous or epig... Flower, fruit and seed 1 answer
Match List I with List IIList I: A. Rhizopus; B. Ustilago; C. Puccinia; D. AgaricusList II: I. Mushroom; II. Smut fungus; III. Bread mould; IV. Rust fungusChoose the correct answer from the options given below: Answer: 2. A-III, B-II, C-IV, D-I Key idea: match the fungus with its common name or disease. Rhizopus: bread mould (III) Ustilago: smut fun... Monera, Protista and Fungi 1 answer
The type of conservation in which the threatened species are taken out from their natural habitat and placed in special setting where they can be protected and given special care is called; Answer: 3. Biodiversity conservation Key idea: removing threatened species from their natural habitat and caring for them in a special setti... Biodiversity conservation: hotspots, Red Data Book, biosphere reserves, national parks, sacred groves 1 answer
Match List I with List IIList I: A. Nucleolus; B. Centriole; C. Leucoplasts; D. Golgi apparatusList II: I. Site of formation of glycolipid; II. Organization like the cartwheel; III. Site for active ribosomal RNA synthesis; IV. For storing nutrientsCh… Answer: 2. A-III, B-II, C-IV, D-I Key idea: match each organelle with its function or structure. Nucleolus: site of active rRNA synthesis (I... Mitochondria, ribosomes, plastids, microbodies 1 answer
The capacity to generate a whole plant from any cell of the plant is called: Answer: 2. Totipotency Key idea: the ability of a single plant cell to grow into a complete plant is totipotency. Micropropagation is the te... Differentiation, dedifferentiation, redifferentiation, development 1 answer
Formation of interfascicular cambium from fully developed parenchyma cells is an example for Answer: 4. Dedifferentiation Key idea: mature cells that regain the ability to divide undergo dedifferentiation. Interfascicular cambium for... Differentiation, dedifferentiation, redifferentiation, development 1 answer
Which one of the following can be explained on the basis of Mendel's Law of Dominance?A. Out of one pair of factors one is dominant and the other is recessive.B. Alleles do not show any expression and both the characters appear as such in F_2 generat… Answer: 3. A, C, D and E only Key idea: the Law of Dominance covers factors in pairs, dominant and recessive factors, and expression of only... Mendelian inheritance 1 answer
What is the fate of a piece of DNA carrying only gene of interest which is transferred into an alien organism?A. The piece of DNA would be able to multiply itself independently in the progeny cells of the organism.B. It may get integrated into the ge… Answer: 4. B and C only Key idea: a piece of alien DNA without an origin of replication cannot multiply on its own. It either integrates int... Processes of recombinant DNA technology 1 answer
Identify the part of the seed from the given figure which is destined to form root when the seed germinates. Answer: 4. C Key idea: in a monocot seed (grain), the radicle lies inside a protective sheath called the coleorhiza. In the figure, A is the... Flower, fruit and seed 1 answer
Match List I with List IIList I: A. Two or more alternative forms of a gene; B. Cross of F_1 progeny with homozygous recessive parent; C. Cross of F_1 progeny with any of the parents; D. Number of chromosome sets in plantList II: I. Back cross; II. P… Answer: 4. A-III, B-IV, C-I, D-II Key idea: match the genetic term with its definition. Alternative forms of a gene: allele (III). Cross of... Mendelian inheritance 1 answer
Identify the set of correct statements:A. The flowers of Vallisneria are colourful and produce nectar.B. The flowers of waterlily are not pollinated by water.C. In most of water-pollinated species, the pollen grains are protected from wetting.D. Poll… Answer: 1. B, C, D and E only Key idea: only some aquatic plants are water pollinated, and these flowers are inconspicuous. A is false: Vall... Pollination: types, agencies, examples 1 answer
Inhibition of Succinic dehydrogenase enzyme by malonate is a classical example of: Answer: 4. Competitive inhibition Key idea: malonate looks like succinate, so it competes for the active site. Malonate is a structural anal... Enzymes: types, properties, action, classification 1 answer
Given below are two statements:Statement I : Bt toxins are insect group specific and coded by a gene cry IAc.Statement II : Bt toxin exists as inactive protoxin in B. thuringiensis. However, after ingestion by the insect the inactive protoxin gets co… Answer: 4. Statement I is true but Statement II is false Key idea: Bt toxin is specific to insect groups, and the protoxin is activated in a... Applications in agriculture: GMOs, Bt crops 1 answer
Lecithin, a small molecular weight organic compound found in living tissues, is an example of: Answer: 3. Phospholipids Key idea: lecithin is a phospholipid. It has glycerol, two fatty acids, a phosphate group and a choline head. Becau... Biomolecules: proteins, carbohydrates, lipids, nucleic acids 1 answer
Which of the following is an example of actinomorphic flower? Answer: 2. Datura Key idea: actinomorphic flowers can be cut into two equal halves in any vertical plane (radial symmetry). Datura is actino... Flower, fruit and seed 1 answer

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