100 Best Biology MCQ

Q49). Photosynthesis is a process

a).reductive and exergonic
b).reductive and catabolic
c).reductive, endergonic and catabolic
d).reductive, endergonic and anabolic

Correct Answer:
reductive, endergonic and anabolic
Explaination:

Q50). On which of the following plants did Gregor Mendal perform his classical experiment?

a).Gram
b).Maize
c).Pea
d).Wheat

Correct Answer:
Pea
Explaination:

Q51). 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:

Q52). 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:

Q53). 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:

Q54). 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:

Q55). Plants receive their nutrients mainly from

a).chlorophyll
b).atmosphere
c).light
d).soil

Correct Answer:
soil
Explaination:

Q56). Movement of cell against concentration gradient is called

a).osmosis
b).active transport
c).diffusion
d).passive transport

Correct Answer:
active transport
Explaination: