set 6 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) transpiration
(b) osmosis
(c) diffusion
(d) capillarity
The correct answers to the above question in:
Answer: (c)
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Read more biology Based General Science Questions and Answers
Question : 1
Parathormone deficiency produces muscle ramps or tetany as a result of
a) enhanced blood Na+
b) lowered blood Ca2+
c) enhanced blood glucose
d) enhanced blood Ca2+
Answer »Answer: (b)
Parathormone released by the parathyroid gland elevates the level of Ca2+ in blood. The deficiency of this hormone lowers blood Ca2+.
As a result, the excitability of muscles and nerves increases producing tetany sustained contraction.
Question : 2
Which one among the following statements about stomach is not correct?
a) Stomach mixes food with gastric juice
b) Stomach acts as a temporary reservoir
c) Stomach secretes lipase and amylase in gastric juice
d) Rate of stomach emptying depends on the type of food
Answer »Answer: (d)
Question : 3
Elbow joint is an example of
a) gliding joint
b) hinge joint
c) ball and socket joint
d) pivot joint
Answer »Answer: (b)
The Elbow joint is an example of the hinge joint. The elbow is a hinge joint; it can open and close like a door.
The hinge joint allows angular movement in one plane only, increasing or decreasing the angle between the bones e.g. elbow joint, knee joint etc.
Question : 4
Which one of the following is primarily concerned with cell division ?
a) IAA
b) Cytokinin
c) GA3
d) Ethylene
Answer »Answer: (b)
Question : 5
Translocation of carbohydrate nutrients usually occurs in the form of
a) maltose
b) starch
c) glucose
d) sucrose
Answer »Answer: (d)
Translocation of organic solutes occur through sieve tubes in the form of sucrose. Transportable form of sugar is sucrose.
Question : 6
Air is breathed through
a) Nose — larynx — pharynx — bronchus — alveoli — bronchioles
b) Trachea — lungs — larynx — pharynx — alveoli
c) Nostrils — pharynx — larynx — trachea — bronchi — bronchioles — alveoli
d) Nose — mouth — lungs
Answer »Answer: (c)
The pathway of inhaled air is -
Nostrils - pharynx (common passage for food & air) - larynx (voice box) - trachea (the windpipe) - bronchi (2 for each side lungs) - bronchioles (give rise to alveolar ducts) - alveoli (the exchange site for gases in the form of small sacs or pouches).
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