set 4 MCQ Questions & Answers Detailed Explanation

MOST IMPORTANT general science mcq - 6 EXERCISES

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The following question based on physiology of plants, humans and animals topic of general science mcq

Questions : Respiration in plants

(a) results in the formation of vitamins

(b) is characteristic of all living cells

(c) occurs only during day

(d) often requires CO2

The correct answers to the above question in:

Answer: (b)

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Read more biology Based General Science Questions and Answers

Question : 1

Functional and structural unit of kidney is

a) seminiferous tubule

b) nephron

c) acini

d) None of these

Answer: (b)

Question : 2

The dead element present in the phloem is

a) phloem fibres

b) companion cells

c) phloem parenchyma

d) sieve tube

Answer: (a)

Question : 3

End product of fermentation of sugars is

a) CO2

b) alcohol and CO2

c) H2O and CO2

d) alcohol

Answer: (b)

The end product of the fermentation of sugars is alcohol and CO2.

Sugars are the most common substrate of fermentation, and typical examples of fermentation products are ethanol, lactic acid, and hydrogen. However, more exotic compounds can be produced by fermentation, such as butyric acid and acetone.

Yeast carries out fermentation in the production of ethanol in beers, wines and other alcoholic drinks, along with the production of large quantities of carbon dioxide.

Fermentation occurs in mammalian muscle during periods of intense exercise where oxygen supply becomes limited, resulting in the creation of lactic acid.

Question : 4

The pH of blood is

a) between 2-4

b) between 7-8

c) between 12-14

d) between 2-5

Answer: (b)

Blood is an opaque, mobile connective tissue fluid which has a salty taste. the pH of blood is between 7-8.

Hence, the blood possesses a slightly alkaline pH.

Question : 5

Growth is primarily affected by two climatic factors which are –

a) Temperature and relative humidity

b) Light and wind

c) Light and temperature

d) Rainfall and temperature

Answer: (c)

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