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Q:

What is the function of guard cells of stomata?

A) Opening of stomata only B) Closing of stomata only
C) Both opening and closing of stomata D) Neither opening nor closing of stomata
 
Answer & Explanation Answer: C) Both opening and closing of stomata

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Q:

In humans, the sound is produced by the ________.

A) oesophagus B) larynx
C) medulla D) epiglottis
 
Answer & Explanation Answer: B) larynx

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Q:

Increased RBC's in the blood leads to a condition called __________ .

A) Anemia B) Haemophilia
C) Polycythemia D) Leukaemia
 
Answer & Explanation Answer: C) Polycythemia

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Q:

Which of the following bears flowers?

A) Bryophyta B) Pteridophyta
C) Gymnosperms D) Angiosperms
 
Answer & Explanation Answer: D) Angiosperms

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Q:

What genes are mutated to cause cancer?

A) TNF B) TP53
C) TGFBI D) MTHFR
 
Answer & Explanation Answer: B) TP53

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Q:

AIDS is caused by the Human Immunodeficiency Virus (HIV). The transmission of HIV infection generally occurs through

A) eating contaminated food and water   B) transfusion of contaminated blood and blood products
C) inhaling polluted air D) shaking hand with infected person
 
Answer & Explanation Answer: B) transfusion of contaminated blood and blood products

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AIDS is caused by the Human Immuno deficiency Virus (HIV), a member of a group of viruses called retrovirus, which have an envelope enclosing the RNA genome. Transmission of HIV-infection generally occurs by (a) sexual contact with infected person, (b) by transfusion of contaminated blood and blood products, (c) by sharing infected needles as in the case of intravenous drug abusers and (d) from infected mother to her child through placenta.

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Q:

Animals belonging to phylum _____________ are fundamentally characterised by the presence of a notochord, a dorsal hollow nerve cord and paired pharyngeal gill slits.

A) Annelida B) Chordata
C) Arthropoda D) Platyhelminthes
 
Answer & Explanation Answer: B) Chordata

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Q:

What cells line the ventricles of the brain?

A) Schwann's cells B) Ependymal cells
C) Nerve cells D) Neuroglia
 
Answer & Explanation Answer: B) Ependymal cells

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