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

2.Movement of cell against concentration gradient is called
A. osmosis
B. active transport
D. passive transport

3. Plants absorb dissolved nitrates from soil and convert them into
A. free nitrogen
B. urea
C. ammonia
D. proteins

4. Nucleus, the genetic material containing rounded body in each cell, was first discovered in 1831 by
A. Robert Hooke
B. Robert Brown
C. Rudolf Virchow
D. Theodore Schwann

5. Most of the red, blue and purple colours of plants are due to a pigment called
A. anthocyanin
B. carotene
C. chlorophyll
D. xanthophylls

6. Ptyalin is an enzyme produced in the
A. salivary glands
B. pituitary glands
C. thyroid glands
D. pancreas

7. Plants are killed in winter by frost
A. because of desiccation and mechanical damage to the tissues
B. because no photosynthesis takes place at such low temperature
C. because respiration ceases at such low temperature
D. because there is no transpiration

8. Organic Substances which, in very small amounts, control growth and development called
A. vitamins
B. hormones
C. enzymes
D. None of the above

9. On which of the following plants did Gregor Mendal perform his classical experiment?
A. Gram
B. Maize
C. Pea
D Wheat

10. Poison glands of snakes are homologous to
A. electric organs of fishes
B. stings of rays
C. sebaceous glands of mammals
D. salivary glands of vertebrates


1. D
2. B
3. A
4. B
5. A
6. A
7. A
8. B
9. C