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Q:

Which statement about capillaries is correct?

A) their walls are covered with cilia B) they warm and humidify inhaled air
C) their walls are only one cell thick D) they move mucus through the lungs
 
Answer & Explanation Answer: C) their walls are only one cell thick

Explanation:

Capillaries Tiny blood vessels connecting arteries to veins. These blood vessels carry oxygen

and nutrients to individual cells. Capillaries are the smallest blood vessels in the body, and have

walls only one or two cells thick. (Their diameter is 5 to 10 micrometers, or 5 to 10 millionths of

a meter.)

 

Capillaries connect arterioles and venules, which are the smaller extensions of the larger arteries and veins.

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Q:

The substrate of photorespiration is

A) Glucose B) Pyruvic acid
C) Glycolate D) Sucrose
 
Answer & Explanation Answer: C) Glycolate

Explanation:
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Q:

Which organ filters blood in human body?

A) Lungs B) Heart
C) Liver D) Kidneys
 
Answer & Explanation Answer: D) Kidneys

Explanation:

The organ which filters blood in human body are kidneys.

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Q:

Which bacteria cause the greatest harm in the food industry?

A) Recycling B) Digestive
C) Fermenting D) Pathogenic
 
Answer & Explanation Answer: D) Pathogenic

Explanation:

Pathogenic bacteria cause the greatest harm in the food industry.

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Q:

The most healthy edible oil for heart is

A) Almond Oil B) Sesame Oil
C) Mustard Oil D) Olive Oil
 
Answer & Explanation Answer: D) Olive Oil

Explanation:
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Q:

Which cells are destroyed in AIDS

A) Monocytes B) Neutrophils
C) Lymphocytes D) R.B.C.
 
Answer & Explanation Answer: C) Lymphocytes

Explanation:
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Q:

Which of these is unique to flowering plants?

A) double fertilization B) an embryo surrounded by nutritive tissue
C) haploid gametophytes D) pollen production
 
Answer & Explanation Answer: A) double fertilization

Explanation:

In flowering plants one sperm nucleus fertilizes the egg and the other sperm nucleus fuses with two other nuclei found within the ovule, thus forming triploid endosperm.

 

Hence, double fertilization is unique to flowering plants.

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Q:

Hepatitis virus destroys the cells and may cause the disease

A) Jaundice B) Malaria
C) Typhoid D) Elephantiasis
 
Answer & Explanation Answer: A) Jaundice

Explanation:
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