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) maltose
(b) starch
(c) glucose
(d) sucrose
The correct answers to the above question in:
Answer: (d)
Translocation of organic solutes occur through sieve tubes in the form of sucrose. Transportable form of sugar is sucrose.
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Read more biology Based General Science Questions and Answers
Question : 1
Which one of the following is primarily concerned with cell division ?
a) IAA
b) Cytokinin
c) GA3
d) Ethylene
Answer »Answer: (b)
Question : 2
The physical process involved in the release of molecular oxygen from leaves is
a) transpiration
b) osmosis
c) diffusion
d) capillarity
Answer »Answer: (c)
Question : 3
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 : 4
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).
Question : 5
Bryophytes are photosynthetic but do not have vascular tissue and true roots. This feature enable them to resemble with which of the following?
a) Pteridophytes
b) Fungi
c) Algae
d) Angiosperms
Answer »Answer: (c)
Like algae, bryophytes are nonvascular. True roots, leaves and stems are also missing.
This similarity has caused scientists to regard the bryophyte as an intermediary in the evolution from algae to land plants.
Question : 6
Nervous tissue is not found in
a) spinal cord
b) brain
c) tendons
d) nerves
Answer »Answer: (c)
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