Biology - Comprehensive Mock Test 161

Question 1601 Medium

Centrioles are composed of ________ triplets of microtubules?

A) 3 B) 9 C) 10 D) 15

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Question 1602 Medium

The number of species of organisms currently known to science is?

A) 3500000 B) 3500 C) 2500000 D) 25000000

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Question 1603 Easy

Which statement is incorrect for pasteurization?

A) It is used to preserve yogurt. B) It was developed by Louis Pasteur. C) It is used to preserve milk D) It can be used to preserve vegetables and meat.

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Question 1604 Medium

Oxygen accounts for ____ % of totals human body mass?

A) 65% B) 18% C) 10% D) 3%

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Question 1605 Medium

Out of 92 naturally occurring chemical elements how many are considered as bio-elements?

A) 6 B) 16 C) 26 D) 15

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Question 1606 Medium

How many carbon atoms are required to form a furan ring (ribofuranose)?

A) 3 B) 4 C) 5 D) 2

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Question 1607 Easy

There are mainly _______ types of tRNA?

A) 170 B) 20 C) 25 D) 15

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Question 1608 Medium

Each turn of DNA contain _______ nitrogenous base pairs?

A) 5 B) 10 C) 20 D) 25

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Question 1609 Medium

An insulin molecule consists of _____ polypeptide chains?

A) 1 B) 2 C) 3 D) 4

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Question 1610 Medium

Total number of amino acids in a hemoglobin molecule are?

A) 554 B) 564 C) 574 D) 584

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