Biology - Mock Test 240

Question 2391

The air spaces may comprise upto ______ of total volume of leaf surface?

A) 30% B) 20% C) 40% D) 50%

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Question 2392

There are ______ stomata per square cm of leaf surface in Tobacco plants?

A) 1200 B) 12000 C) 100,000 D) 1000

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Question 2393

Water is _____ times viscous than air?

A) 50 B) 1000 C) 5000 D) 8000

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Question 2394

Oxygen contents per liter of air is?

A) 10 ml B) 100 ml C) 200 ml D) 100ml

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Question 2395

Of the following, which one is better respiratory medium?

A) Air B) Water C) Soil D) None of these

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Question 2396

__ respiration is the process by which cell utilized oxygen and produces CO2?

A) Cellular B) Organismic C) Both of these D) None of these

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Question 2397

__ respiration is directly involved in the production of energy, necessary for all living activities?

A) Organismic B) Cellular C) Both of these D) None of these

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Question 2398

Pepsinogen is produced from?

A) Mucous cells B) Parietal cells C) Zymogen cells D) All of these

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Question 2399

Dipeptides into amino acids are are converted through?

A) Amino peptidase B) Erypsin C) Pepsin D) Trypsin

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Question 2400

Mastication is carried out by?

A) Teeth B) Tongue C) Smooth muscles D) All of these

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