Biology - General Knowledge Questions

1 .
Pine, fir, spruce, cedar, larch and cypress are the famous timber-yielding plants of which several also occur widely in the hilly regions of India. All these belong to
A)
angiosperms
B)
gymnosperms
C)
monocotyledons
D)
dicotyledons

Correct Answer :   gymnosperms

2 .
Mutation is
A)
a factor responsible for plant growth
B)
a change which affects the offspring of F2 generation only
C)
a change that is inherited
D)
a change which affects the parents

Correct Answer :   a change that is inherited

3 .
Ozone hole refers to
A)
hole in ozone layer
B)
decrease in the ozone layer in troposphere
C)
decrease in thickness of ozone layer in stratosphere
D)
increase in the thickness of ozone layer in troposphere

Correct Answer :   decrease in thickness of ozone layer in stratosphere

4 .
Oxyreductases, transferases, hydrolases, lyases, isomerases and ligases are all classes of
A)
hormones
B)
enzymes
C)
proteins
D)
vitamins

Correct Answer :   enzymes

5 .
Ordinary table salt is sodium chloride. What is baking soda?
A)
Potassium chloride
B)
Potassium carbonate
C)
Potassium hydroxide
D)
Sodium bicarbonate

Correct Answer :   Sodium bicarbonate

6 .
Mycobacterium leprae causes leprosy, Corynebacterium diphtheria causes diphtheria and Vibrio comma causes
A)
tetanus
B)
influenza
C)
cholera
D)
typhoid

Correct Answer :   cholera

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