301. Half-time is a time of _ taken by that substance to decompose radioactivity to half of its weight:
A. Radioactive substance
B. Plants and Animals
C. Solid Substance
D. Gases substance
302. Light energy is stored in the form of _ due to the activity of chloroplast:
A. Electrical energy
B. Mechanical energy
C. Chemical energy
D. None of the above
303. Alzheimer is a disease of the?
A. Nerve cells
B. Liver cells
C. Brain cells
D. None of the above
304. In which month do child milk teeth appear?
A. 4th
B. 5th
C. 6th
D. 7th
305. Which disease is respiratory in nature?
A. Haemophilia
B. Allergy
C. Emphysema
D. Insomnia
306. Nitrates are used in the production of __ in green plants.
A. Fats
B. Proteins
C. Carbohydrates
D. None of the above
307. Milky way galaxy shape is?
A. Circular
B. Triangular
C. Spiral
D. Elliptical
308. The meaning of the virus is?
A. Spray
B. Not good for health
C. Poison
D. None of the above
309. From the following which is the disease of the nervous system?
A. Epidermy
B. Epilepsy
C. Scurvy
D. All of the above
310. Why do day and night change?
A. Due to the earth’s rotation around its axis
B. Due to the earth’s rotation around the moon
C. Due to the revolution of the earth
D. All of the above
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