100 Best Biology MCQ
Top 100 MCQs on Biology
Q1). 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
Explaination:
Q2). 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
Explaination:
Q3). 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
Explaination:
Q4). Pollination is best defined as
a).transfer of pollen from anther to stigma
b).germination of pollen grains
c).growth of pollen tube in ovule
d).visiting flowers by insects
Correct Answer:
transfer of pollen from anther to stigma
Explaination:
Q5). Plants receive their nutrients mainly from
a).chlorophyll
b).atmosphere
c).light
d).soil
Correct Answer:
soil
Explaination:
Q6). Movement of cell against concentration gradient is called
a).osmosis
b).active transport
c).diffusion
d).passive transport
Correct Answer:
active transport
Explaination:
Q7). Photosynthesis generally takes place in which parts of the plant?
a).Leaf and other chloroplast bearing parts
b).stem and leaf
c).Roots and chloroplast bearing parts
d).Bark and leaf
Correct Answer:
Leaf and other chloroplast bearing parts
Explaination:
Q8). Most fish do not sink in water because of the presence of
I. swim bladder
II. air bladder
III. air sacs
IV. air in spongy bones
a).A. I and II are correct
b).B. II and III are correct
c).C. III and IV are correct
d).D. I, II, III and IV are correct
Correct Answer:
A. I and II are correct
Explaination: