GATE XL topic:biology PYQs & Answers — Page 122

Questions 1211–1220 of 1235. Imported answers require independent review unless marked reviewed.

Match the items in column I with the items in column II in relation to food safety and standards.

Column I P. HACCP Q. FSSAI R. CIP S. CODEX

Column II

International food standards

Quality control protocol

Food plant sanitation and hygiene protocol

Indian food standards

Your answerChoose one option.

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

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

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

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

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A 50% sucrose solution at 20 °C is flowing at a rate of 3.5 m³/h through a pipe with an inside diameter of 0.0475 m and length of 12 m. The viscosity and the density of the solution are 15.43 cp and 1232 kg/m³, respectively. The Reynolds number of the flow is ______.

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In a pineapple juice, fibre particles having mean diameter of 160 μm and density of 1075 kg/m³ are settling by gravity. If the density and viscosity of the juice are 1015 kg/m³ and 0.98 cp, respectively, terminal velocity of the fibre particles is ______ mm/s.

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Power consumption in liquid mixing is proportional to ______.

Your answerChoose one option.

Power number × liquid density × (rotational speed)³ × (impeller diameter)⁵

Power number × liquid density × (rotational speed)² × (impeller diameter)³

Liquid density × viscosity of the liquid × (rotational speed)² × (impeller diameter)³

Acceleration due to gravity × liquid density × (rotational speed)³ × (impeller diameter)⁵

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In dye-reduction test for estimation of viable microorganisms, the most commonly used dyes are methylene blue, triphenyltetrazolium-chloride and ______________.

Your answerChoose one option.

Malachite green

Amaranth

Tartrazine

Resazurin

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Match the following items of group I with the items of group II in relation to the quality of fat.

Group I P. Saponification number Q. Iodine number R. Reichert Meissl number S. Acetyl value

Group II

Unsaturation of fatty acid

Volatile water soluble fatty acid

Hydroxy fatty acid

Molecular weight of fatty acid

Your answerChoose one option.

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

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

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

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

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Match the following metabolic product (Column I) that indicates the quality of food (Column II).

Column I P. Ethanol Q. Lactic acid R. Trimethylamine S. Volatile fatty acid

Column II

Canned vegetable

Fish

Butter

Apple juice

Your answerChoose one option.

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

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

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

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

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Correlate the vitamins in column I with their role in promoting reaction/process in column II.

Column I P. Riboflavin Q. Vitamin D R. Pantothenic acid S. Vitamin A

Column II

Visual cycle

Acyl group transfer

Regulation of Ca²⁺ metabolism

Oxidation-reduction reaction

Your answerChoose one option.

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

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

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

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

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A pure strain with generation time of 60 min is used in a fermentation process. Following inoculation (0 h), the strain takes 2 h for adaptation, 10 h to achieve maximum growth and 12 h to arrive at the point where the death rate is higher than the growth rate. If the inoculation load is 100 cells, the total population at the end of 10 h will be _________.

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Refer to the shear stress – shear rate plot shown in the figure below. Match the lines (Column I) with appropriate rheological behavior (Column II).

Column I P. Line 1 Q. Line 2 R. Line 3 S. Line 4

Column II

Dilatant

Newtonian

Pseudoplastic

Bingham plastic

Your answerChoose one option.

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

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

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

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

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GATE XL topic:biology PYQs

Question 101

Question 102

Question 103

Question 104

Question 105

Question 106

Question 107

Question 108

Question 109

Question 110