set 4 MCQ Questions & Answers Detailed Explanation

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

Questions : End product of fermentation of sugars is

(a) CO2

(b) alcohol and CO2

(c) H2O and CO2

(d) alcohol

The correct answers to the above question in:

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.

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Read more biology Based General Science Questions and Answers

Question : 1

Which part of the plant do not perform photosynthesis?

a) Guard cell of stomata

b) Mesophyll cells of leaf

c) Cactus stem

d) Leaf epidermis

Answer: (d)

Question : 2

Hydroponics is a technique in which plants are grown in

a) water saturated sand

b) balanced nutrient solution

c) green house

d) purified distilled water

Answer: (b)

Question : 3

Bones are mainly made up of

a) calcium and sulphur

b) calcium and phosphorous

c) calcium and magnesium

d) calcium and iron

Answer: (b)

Bone is the solid rigid strong connective tissue. Its matrix consists of ossein protein and mineralization of matrix occurs by calcium- phosphate salts. This gives rigidity and strength to bones.

Question : 4

The dead element present in the phloem is

a) phloem fibres

b) companion cells

c) phloem parenchyma

d) sieve tube

Answer: (a)

Question : 5

Functional and structural unit of kidney is

a) seminiferous tubule

b) nephron

c) acini

d) None of these

Answer: (b)

Question : 6

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

Answer: (b)

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