GATE XL topic:life-sciences PYQs & Answers — Page 31

Questions 301–310 of 1235. Imported answers require independent review unless marked reviewed.

With reference to Agrobacterium tumefaciens mediated plant transformation, match the virulence factors in Group 1 with their protein types in Group 2.

Group 1: (P) VirG; (Q) VirA; (R) VirE; (S) VirC.

Group 2: (i) Kinase; (ii) Helicase; (iii) Transcriptional activator; (iv) Single strand binding protein

Your answerChoose one option.

P–i, Q–ii, R–iv, S–iii

P–iii, Q–i, R–ii, S–iv

P–ii, Q–iv, R–i, S–iii

P–iii, Q–i, R–iv, S–ii

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Match the plant products in Group 1 with the plant species in Group 2 that produce them and the respective plant parts in Group 3 where they accumulate the most.

Group 1: (P) Liquorice; (Q) Quinine; (R) Henna; (S) Saffron.

Group 2: (i) Cinchona calisaya; (ii) Lawsonia inermis; (iii) Glycyrrhiza glabra; (iv) Papaver somniferum; (v) Crocus sativus.

Group 3: (a) Leaf; (b) Root; (c) Flower; (d) Bark; (e) Seed

Your answerChoose one option.

P–iii–b, Q–i–d, R–ii–a, S–v–c

P–i–b, Q–iii–d, R–ii–a, S–iv–c

P–iii–b, Q–i–d, R–ii–e, S–v–c

P–iv–b, Q–i–d, R–iii–c, S–ii–a

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Match the types of ecological interactions in Group 1 with their respective definitions in Group 2.

Group 1: (P) Protocooperation; (Q) Commensalism; (R) Amensalism; (S) Helotism.

Group 2: (i) One species is harmed but the other is neither harmed nor benefited; (ii) A type of mutualism where one species is benefited more than the other; (iii) Both the species are benefited but the interaction between them is not obligatory; (iv) One species is benefited without harming the other

Your answerChoose one option.

P–ii, Q–iv, R–i, S–ii

P–ii, Q–i, R–iii, S–iv

P–i, Q–iv, R–ii, S–ii

P–iii, Q–i, R–iv, S–ii

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Match the types of ecological energy productivity in Group 1 with their respective definitions in Group 2.

Group 1: (P) Net primary productivity; (Q) Gross primary productivity; (R) Net productivity; (S) Secondary productivity.

Group 2: (i) Total amount of energy produced by autotrophs; (ii) Amount of energy stored by autotrophs after respiration; (iii) Net gain of energy by the consumers after energy loss; (iv) Unused amount of energy after consumption by heterotrophs.

Your answerChoose one option.

P–ii, Q–ii, R–iv, S–i

P–ii, Q–i, R–iii, S–iv

P–ii, Q–i, R–iv, S–iii

P–iv, Q–i, R–ii, S–iii

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Which of the following combinations of plant diseases and the types of their causal organisms is/are CORRECT?

Your answerSelect all correct options. You can choose more than one.

Late blight of potato – Bacteria

Black rot of crucifer – Bacteria

Tungro disease of rice – Mycoplasma

Root knot of tomato – Nematode

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Identify the CORRECT combination(s) of plant natural products and the categories they belong to.

Your answerSelect all correct options. You can choose more than one.

Dhurrin – Phenolic compounds

Farnesene – Terpenoids

Naringenin – Cyanogenic glycosides

Vincristine – Alkaloids

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Identify the CORRECT combination(s) between the enzymes in Group 1 and the reactions in Group 2 they catalyze.

Group 1: (P) Cinnamate-4-hydroxylase; (Q) Glycerate kinase; (R) PEP carboxylase; (S) Nitrate reductase.

Group 2: (i) L-phenylalanine → Cinnamic acid; (ii) Glyceraldehyde 3-phosphate → dihydroacetone phosphate; (iii) Glycolate + O₂ → Glyoxylate + H₂O₂; (iv) NO₃⁻ + NAD(P)H + H⁺ → NO₂⁻ + NAD(P)⁺ + H₂O

Your answerSelect all correct options. You can choose more than one.

S–iv

Q–ii

P–i

R–iii

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In a genetic cross between two pure-line parents differing in the two independent segregating traits, plant height (tall vs dwarf) and flower color (purple vs white), all the F1 plants were tall with purple flowers. In a testcross population involving these F1 individuals, the expected percentage (%) of dwarf plants with purple flower would be ______ (in integer).

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The mRNA of a hypothetical plant gene HSDU is 800-nucleotide long and encodes a protein of 160 amino acid residues. The calculated length of HSDU CDS would be ______ nucleotides (in integer).

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Which one of the following bacterial species can cause atypical pneumonia?

Your answerChoose one option.

Chlamydia pneumoniae

Streptococcus pneumoniae

Klebsiella pneumoniae

Haemophilus influenzae

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GATE XL topic:life-sciences PYQs

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