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10th Class Biology Important Objective MCQs Notes

10th Class Biology Important Objective MCQs Notes

Choose the correct answer from the following choices:

  1. The process of gaseous exchange involves;

Breakdown of C-H bonds to yield energy

Physical movements that take air in and out of body

Getting oxygen from the air and removing carbon dioxide

Transport of oxygen by the blood to different parts of the body

  1. Most of the gaseous exchange in a leaf occurs through;

Stomata

General surface

Cuticle

Lenticels

  1. How many bronchi are there in the air passageway?

One

Two

Many

None

  1. Where does the gaseous exchange occur in humans?

Pharynx

Trachea

Bronchi

Alveoli

  1. Which structure actively helps in taking the air out of lungs?

Nasal cavity

Bronchus

Bronchiole

Diaphragm

  1. The primary chemical stimulus for breathing is the concentration of;

Carbon dioxide in blood

Oxygen in blood

Carbon dioxide in muscles

Oxygen in muscles

  1. Point out the FALSE statement about respiration;

Gases can easily pass through the walls of the alveoli

Gas        exchange            in            lungs     is             very       efficient               because               lungs     provide

large surface area

In emphysema the walls of alveoli break and there is more surface area

Dust particles can damage the lung by irritating the inner alveoli surface

  1. A disease involving the breakdown of air sacs of the lungs is;

Pneumonia

Bronchitis

Asthma

Emphysema

  1. Which process does NOT occur in the nasal cavity?

Trapping of large dust particles

Humidification   of            the         inhaled air

Warming of the inhaled air

Exchange of gases

  1. What type of blood vessels surrounds the alveoli?

Artery

Arteriole

Capillary

Vein

11.Antibiotics are used for the;

Treatment of viral infections

Treatment of bacterial infections

Immunization against infections\

Both ’a and ’b’

  1. The substances used for the treatment, cure, prevention or diagnosis of disease are called;

Medicinal drugs

Narcotics

Hallucinogens

Sedatives

  1. Aspirin is categorized as;

A drug from animals

A synthetic drug

A drug from plants

A drug from minerals

  1. The drugs used to reduce pain are known as;

Analgesics

Antiseptics

Antibiotics

Sedatives

  1. Which of the following drugs is obtained from plants?

Aspirin

Opium

Cephalosporin

Insulin

  1. Which of these addictive drugs are also used as painkillers?

Narcotics

Sedatives

Hallucinogens

All can be used

  1. Sulfonamides affect bacteria in the following way;

Break the cell wall

Inhibit protein synthesis

Stop the synthesis of new cell wall

Stop the synthesis of folic acid

  1. What is true about vaccines?

Protect against the future viral and bacterial infections

Treat the existing bacterial infections only

Treat existing infections and also protect against future infections

Protect against viral infections only

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