One of the main function of the earth’s ozone layer is to:
(a) Prevent global warming
(b) Filter out ultraviolet rays-✔️
(c) Absorb pollution
(d) All of the above
Ozone layer (stratospheric ozone) is a high concentration of ozone molecules about 30 to 50 km altitude (stratosphere). The main function of the ozone layer is to absorb the Sun's ultraviolet radiation, hence protecting the Earth from its harmful effects.
Insulin is injected into the intestines by
(a) Pancreas-✔️
(b) Liver
(c) Stomach
(d) Gall bladder
Lock Jaw, i.e., difficulty in opening the mouth is a symptom of
(a) Cholera
(b) Plague
(c) Tetanus-✔️
(d) Diphtheria
Which of the following pairs is incorrect?
(a) Plague-✔️rats
(b) Rabies-✔️dog
(c) Tapeworm-✔️pig
(d). Poliomyelitis-✔️monkey-✔️
Match the following columns Column I Column II
A. Air-borne 1. Tetanus
B. Water-borne 2. Tuberculosis
C. Contact 3. Cholera
D. Wound 4. Syphilis
(a) 2 3 1 4
(b) 2 3 4 1-✔️
(c) 3 2 4 1
(d) 4 3 2 1
Ricketts is a disease of the
(a) Bones-✔️
(b) Tissue
(c) Muscles
(d) Blood
Which of the following statements is correct?
(a) Pulmonary artery carries pure blood
(b) Pulmonary artery carries impure blood-✔️
(c) Pulmonary vein carries impure blood
(d) None of these
Lungs are situated in the
(a) Abdominal cavity
(b) Pericardial cavity
(c) Buccal cavity
(d) Thoracic cavity-✔️
The human cell contains
(a) 44 chromosomes
(b) 48 chromosomes
(c) 46 chromosomes-✔️
(d) 23 chromosomes
Enzymes help in
(a) Respiration
(b) Digestion of food-✔️
(c) Immune system
(d) Reproduction
Food is normally digested in the
(a) Liver
(b) Stomach
(c) Small intestines-✔️
(d) Large intestines
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