GATE XL discipline:life-sciences PYQs & Answers — Page 117

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Questions 1161–1170 of 1235. Imported answers require independent review unless marked reviewed.

Topic practice 1235 questionsPage 117 of 124

Identify the CORRECT matching between group I and group II in relation to ecology

GROUP I P. The physical environment of an organism Q. The totality of the needs of a population for survival and its resource utilization R. The position of a species in a food chain S. Basic functional unit comprising living community and its physical environment

GROUP II

Trophic level

Habitat

Ecosystem

Niche

Ecological pyramid

Your answerChoose one option.

P-2, Q-5, R-4, S-1

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

P-5, Q-2, R-3, S-1

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

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Choose the CORRECT set of matches between group I and group II in relation to plant genetic transformation methods.

GROUP I P. Helium Q. Acetosyringone R. Polyethylene glycol S. Agarose embedding

GROUP II

Agrobacterium tumefaciens

Microinjection

Particle bombardment

Protoplast

Your answerChoose one option.

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

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

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

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

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Match the pathogen, disease caused and the affected plant in the CORRECT combination.

Pathogen P. Blumeria graminis Q. Magnaporthe grisea R. Venturia inaequalis S. Cercospora personata

Disease i. Blast disease ii. Powdery mildew iii. Tikka disease iv. Scab disease

Plant

Groundnut

Apple

Barley

Rice

Your answerChoose one option.

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

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

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

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

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Choose the plant part, its use and the source species in CORRECT combination.

Plant Part P. Bark Q. Leaf R. Capsule S. Stigma

Use i. Insecticide ii. Food colorant iii. Flavoring agent iv. Analgesic

Species

Crocus sativus

Papaver somniferum

Azadirachta indica

Cinnamomum zeylanicum

Your answerChoose one option.

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

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

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

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

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Which TWO of the following reactions are INCORRECT in relation to C

oxidative photosynthetic carbon cycle in land plants?

P. 2 (Ribulose-1,5-bisphosphate) + 2(CO

) → 2 (phosphoglycolate) + 2 (3-phosphoglycerate) + 4H

Q. Serine + α-ketoglutarate ⇌ hydroxypyruvate + glutamine R. 2 (Phosphoglycolate) + 2(H

O) → 2 (glycolate) + 2Pi S. Hydroxypyruvate + NADH + H

→ glycerate + NAD

Your answerChoose one option.

P and Q

Q and R

R and S

S and P

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Which one of the following is the end product of dissimilatory sulfate reduction by sulfate reducing bacteria?

Your answerChoose one option.

Hydrogen sulfide

Sulfur dioxide

Sulfur

Thiosulfate

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Which one of the following is the terminal electron acceptor in the given metabolic reaction catalyzed by methanogens?

Your answerChoose one option.

H₂

CO₂

CH₄

H₂O

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Microbes that have their optimal growth rate near 15 °C but can still grow at 0 °C to 20 °C are known as

Your answerChoose one option.

mesophiles

psychrotrophs

psychrotolerant

psychrophiles

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Which one of the following is NOT a contribution by Robert Koch?

Your answerChoose one option.

Identification of causative agent of anthrax.

Discovery of causative agent of tuberculosis.

Discovery of causative agent of leprosy.

Identification of causative agent of cholera.

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Unicellular eukaryotic organisms belong to which one of the following kingdoms of classification?

Your answerChoose one option.

Monera

Plantae

Protista

Animalia

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GATE XL discipline:life-sciences PYQs

Question 51

Question 52

Question 53

Question 54

Question 55

Question 56

Question 57

Question 58

Question 59

Question 60