Biology Questions

Q:

Which of the following is a characteristic of all angiosperms?

A) double internal fertilization B) ovules that are not contained within ovaries
C) complete reliance on wind as the pollinating agent D) free-living gametophytes
 
Answer & Explanation Answer: A) double internal fertilization

Explanation:

The flowering plants, also known as angiosperms, Angiospermae or Magnoliophyta, are the most diverse group of land plants. These are also seed producing plants like gymnosperms. In Angiosperms seeds are in flowers.

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Q:

A Phospholipid is a

Answer

A Phospholipid is a lipid molecule which has hydrophilic head and a hydrophobic tailand and is a main component in making of all cell membranes in which they two form a parallel layers called Phospholipid bilayer.

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Q:

Symbiotic Bacteria responsible for the fixation of atmospheric nitrogen are present in

A) peas B) wheat
C) corn D) oats
 
Answer & Explanation Answer: A) peas

Explanation:
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Q:

Which is the largest gland in human body?

A) Liver B) Thyroid
C) Pituitary D) Salivary gland
 
Answer & Explanation Answer: A) Liver

Explanation:
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Q:

Which among the following is not a connective tissue?

A) Blood B) Bone
C) Skin D) Cartilage
 
Answer & Explanation Answer: C) Skin

Explanation:
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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 is responsible for giving colour to human skin?

A) Luciferin B) Haemoglobin
C) Flavonoids D) Melanin
 
Answer & Explanation Answer: D) Melanin

Explanation:
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Q:

Night Blindness is caused by deficiency of which of the following Vitamin?

A) Vitamin B B) Vitamin C
C) Vitamin K D) Vitamin A
 
Answer & Explanation Answer: D) Vitamin A

Explanation:
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