GATE XL topic:biology PYQs & Answers — Page 48

Questions 471–480 of 1235. Imported answers require independent review unless marked reviewed.

Topic practice 1235 questionsPage 48 of 124

The synthesis of thyroxine T4 in human body requires

Your answerChoose one option.

Selenium

Iodine

Iron

Zinc

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Which among the followings is NOT an essential amino acid?

Your answerChoose one option.

L-Phenalanine

L-Valine

L-Lysine

L-Arginine

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The time required for stipulated destruction of a microbial population at a given temperature is

Your answerChoose one option.

D-value

F-value

z-value

Q₁₀ value

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Which among the following statements is NOT correct?

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Cod fish is a major source of ω-3 fatty acids.

Beetroot is a good source of β-carotene.

Apple is a good source of vitamin B₁₂.

Fresh sugarcane juice is a good source of polyphenol oxidase.

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Calculate the efficiency in percent (rounded off to 1 decimal place) of an oil expeller which yields 37 kg oil containing 5% solid impurities from 100 kg mustard seeds. The oil content of the mustard seed is 38%.

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Orange juice is packaged aseptically and stored under ambient conditions. The degradation of vitamin C in the juice occurs during storage and it follows first order reaction kinetics. The degradation rate constant is 5.2×10⁻³ day⁻¹. The half-life of vitamin C in days is __________ (in integer).

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The weight of 10 kg dried cauliflower containing 5% moisture (wet basis) after rehydration is 60 kg. If the fresh cauliflower contained 87% moisture (wet basis), calculate the coefficient of rehydration (rounded off to 2 decimal places).

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Some of the industrial products are produced by fermentation processes. Identify the correct pair of product and fermentive microorganism.

Your answerChoose one option.

Vinegar - Acetobacter aceti

Citric acid - Enterbacter aerogenes

Ethanol - Saccharomyces cerevisiae

L-Lysine - Aspergillus niger

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Choose the correct statement(s) about the enzyme and its application in food processing reaction.

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Chymosin is widely used in cheese manufacturing.

Thermolysin is used in the synthesis of Aspartame.

β-Galactosidase catalyzes the hydrolysis of galactose.

Lipase is used for restructuring of acyl glycerol.

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Identify the Gram +ve bacteria responsible for causing food borne diseases among the followings

Your answerChoose one option.

Campylobacter jejuni

Clostridium botulinum

Vibrio cholerae

Salmonella typhi

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GATE XL topic:biology PYQs

Question 105

Question 106

Question 107

Question 108

Question 109

Question 110

Question 111

Question 112

Question 113

Question 114