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21.

Process of transpiration in plants helps in:

A.	Absorption of CO2	B.	Upward conduction
C.	Opening of stomata	D.	None of these

22.

Plasmolysis will occur when the cell is placed in a:

A.	Acidic solution	B.	Isotonic solution
C.	Hypotonic solution	D.	Hypertonic solution

23.

Blue green algae are:

A.	Actinomycetes	B.	Acellular
C.	Prokaryotes	D.	Eukaryotes

24.

The solute transport into the cells is strongly dependent on _____ and ability of cells to respire aerobically and to produce it:

A.	ADP	B.	ATP
C.	RNA	D.	DNA

25.

Which one of the following is a prokaryote?

A.	Agaricus	B.	Salmonella
C.	Green algae	D.	Bacteriophage

26.

Enzymes, vitamins and hormones can be classified into a single category of biological chemicals because all of them:

A.	Aid in regulating metabolism	B.	Are proteins
C.	Are synthesized within the body	D.	Enhance the oxidative metabolism

27.

ABA (abscic acid) appears to be universal among:

A.	Algae	B.	Liveworts
C.	Vascular plants	D.	All mosses

28.

Simplest amino acid is:

A.	Alanine	B.	Glycine
C.	Leucine	D.	Aspartic acid

29.

Phytochrome is found in:

A.	Algae	B.	Fungi
C.	Gymnosperms	D.	Angiosperms

30.

Which of the following can fix atmospheric nitrogen?

A.	Alkaloids	B.	Fats
C.	Alcohols	D.	Anabacena