Biology Questions

Q:

The swollen bottom part of the carpel in a flower is ______.

A) Ovary B) Style
C) Stigma D) Anther
 
Answer & Explanation Answer: A) Ovary

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Q:

The antibiotic penicillin is obtained from which of the following ?

A) synthetic process B) a bacterium
C) fungus D) virus infected cells
 
Answer & Explanation Answer: C) fungus

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Q:

What is the shape of the two guard cells which enclose stomata?

A) Oval B) Triangular
C) Rectangular D) Kidney shaped
 
Answer & Explanation Answer: D) Kidney shaped

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Q:

In how many parts is the human brain divided?

A) 2 B) 3
C) 4 D) 5
 
Answer & Explanation Answer: B) 3

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Q:

Synapse gap is present between which of the following?

A) Two neurons B) Brain and Spinal Cord
C) Two Kidneys D) None of these
 
Answer & Explanation Answer: A) Two neurons

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Q:

Steroid hormones exert their action by

A) entering the cell and activating mitichondrial DNA B) binding cell receptors
C) activating hypothalmic release of regulating hormones D) entering the nucleus of a cell and initiating or altering the expression of a gene
 
Answer & Explanation Answer: D) entering the nucleus of a cell and initiating or altering the expression of a gene

Explanation:

Steroid hormones exert their action by entering the nucleus of a cell and initiating or altering the expression of a gene.

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Q:

Which of the following vitamins are water soluble?

A) Vit. A & Vit. B B) Vit. B & Vit. C
C) Vit. C & Vit. D D) Vit. A & Vit. K
 
Answer & Explanation Answer: B) Vit. B & Vit. C

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Q:

Homeostasis is the condition in which the body maintains

A) a relatively stable internal environment within limits B) a changing state within an unlimited range
C) the lowest possible energy usage D) a static state with no deviation from preset points
 
Answer & Explanation Answer: A) a relatively stable internal environment within limits

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