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
(a) Guard cell of stomata
(b) Mesophyll cells of leaf
(c) Cactus stem
(d) Leaf epidermis
The correct answers to the above question in:
Answer: (d)
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Read more biology Based General Science Questions and Answers
Question : 1
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 »Answer: (b)
Question : 2
Bones are mainly made up of
a) calcium and sulphur
b) calcium and phosphorous
c) calcium and magnesium
d) calcium and iron
Answer »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 : 3
Which element is required in comparatively least quantity for the growth of plant?
a) N
b) P
c) Zn
d) Ca
Answer »Answer: (c)
Question : 4
End product of fermentation of sugars is
a) CO2
b) alcohol and CO2
c) H2O and CO2
d) alcohol
Answer »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 : 5
The dead element present in the phloem is
a) phloem fibres
b) companion cells
c) phloem parenchyma
d) sieve tube
Answer »Answer: (a)
Question : 6
Functional and structural unit of kidney is
a) seminiferous tubule
b) nephron
c) acini
d) None of these
Answer »Answer: (b)
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