Q. Mutation in a virus is caused due to a change in its -
1) cell size
2) genetic material
3) shape
4) colour
Q. Which one of the following living organisms gives litmus?
1) Protozoa
2) Virus
3) Lichen
4) Saccharomyces
Q. Which of the following mineral acids is found in the human stomach?
1) Hydrochloric acid
2) Lactic acid
3) Uric acid
4) Methanoic acid
Q. The disease rickets develops in children due to the deficiency of -
1) Vitamin C
2) Vitamin D
3) Vitamin A
4) Vitamin B
Q. Plants prepare glucose in the process of -
1) respiration
2) photosynthesis
3) degradation
4) mineral absorption
Q. Which one of the following statements is correct about cell membranes?
1) It is made up of cellulose
2) It is a permeable structure for all substances
3) It is flexible and enables the cell to engulf many materials
4) It does not allow the diffusion of gases like oxygen and carbon dioxide
Q. Suppose, due to an accident, the delicate lining of the mouth and the oesophagus of a person is injured. In this case, which one of the following tissues will be affected?
1) Smooth muscle
2) Cuboidal epithelium
3) Squamous epithelium
4) Striated muscle
Q. Methanoic acid is normally found in -
1) muscles
2) urine
3) ant stings
4) human brain
Q. The foul smell from a body especially during a sultry summer is due to the action of ............. on sweat.
1) melanin
2) moisture
3) becteria
4) virus
Q. Which of the following diseases CANNOT be prevented by vaccination?
1) Rabies
2) Beriberi
3) Typhoid
4) Measles
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