GATE XL Economic and applied Botany PYQs & Answers

Questions 1–10 of 17. Imported answers require independent review unless marked reviewed.

Correctly match the following plant species in Group-I with their main economically important products in Group-II.

Group-I: (P) Gossypium arboreum; (Q) Dalbergia sissoo; (R) Hevea brasiliensis; (S) Pelargonium graveolens.

Group-II: (1) Rubber; (2) Spices; (3) Fibre; (4) Timber; (5) Essential oil

Your answerChoose one option.

P–3; Q–4; R–1; S–5

P–3; Q–4; R–1; S–2

P–2; Q–4; R–1; S–3

P–3; Q–1; R–2; S–5

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Choose the correct combination(s) of alkaloid, source plant, and their main commercial use.

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

Vincrine – Catharanthus roseus – anticancer drug

Scopolamine – Hyoscyamus niger – anticholinergic drug

Cocaine – Conium maculatum – antimalarial drug

Pilocarpine – Eschscholzia californica – antidepressant drug

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Which one of the following commercially important carbohydrates is naturally produced only by the members of the plant kingdom?

Your answerChoose one option.

Cellulose

Pectin

Chitin

Starch

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Correctly match the economically important specialized metabolites (Group I) with their broad chemical classes (Group II).

Group I: (P) Azadirachtin; (Q) Saponin; (R) Gallocatechin; (S) Cocaine; (T) Menthol Group II: (1) Monoterpene; (2) Alkaloid; (3) Triterpene glycoside; (4) Polyphenol; (5) Triterpene

Your answerChoose one option.

P-5; Q-3; R-2; S-4; T-1

P-2; Q-4; R-3; S-1; T-5

P-5; Q-3; R-4; S-2; T-1

P-3; Q-5; R-4; S-2; T-1

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Which of the following statements is/are CORRECT with reference to rubber production from plants?

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

Para rubber is produced from Hevea brasiliensis

India rubber is produced from Ficus elastica

Panama rubber is produced from Manihot glaziovii

Ceara rubber is produced from Castilla elastica

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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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Which one or more processes listed below DOES NOT/DO NOT produce carbon dioxide during fermentation?

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

Brewing wine using yeast.

Baking bread using yeast.

Making yogurt using lactobacillus.

Making cheese using fungus.

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Which one of the options given correctly matches the alkaloids in Group I with their source plants in Group II?

Group I P. Cocaine Q. Caffeine R. Morphine S. Atropine

Group II

Coca

Nightshade

Coca

Poppy

Your answerChoose one option.

P-3; Q-1; R-4; S-2

P-1; Q-3; R-4; S-2

P-2; Q-1; R-3; S-4

P-4; Q-2; R-1; S-3

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Which of the following matches is/are CORRECT?

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

Surface fibre – Coton – Gossypium hirsutum

Bast fibre – Flax – Corchorus capsularis

Drying oil – Safflower oil – Helianthus annuus

Non-drying oil – Castor oil – Ricinus communis

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Find the CORRECT match among the plant species in GROUP I, the predominant phytochemical in GROUP II and the economic/medicinal use in GROUP III.

GROUP I P. Syzygium aromaticum Q. Gracilaria sp. R. Catharanthus roseus S. Theobroma cacao T. Papaver somniferum

GROUP II i. Vinciline ii. Eugenol iii. Agar iv. Morphine v. Flavonols

GROUP III

Toothache relief

Desert jelly

Leukaemia treatment

Analgesic

Beverage

Your answerChoose one option.

P-i-1, Q-ii-3, R-iii-4, S-v-5, T-iv-2

P-ii-1, Q-iii-2, R-i-3, S-v-5, T-iv-4

P-ii-1, Q-iii-2, R-iv-4, S-i-3, T-v-5

P-i-2, Q-iii-3, R-iv-1, S-iii-5, T-v-4

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GATE XL Economic and applied Botany PYQs

How to practice Economic and applied Botany

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Question 50

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Question 58

Question 53

Question 60

Question 62

Question 14