Class 10th Biology Very Important Objective MCQs Notes 2020

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Class 10th Biology Very Important Objective MCQs Notes 2020L: Here I Am Give You Very Important Objective MCQs Notes 2020 For Biology Class 10th. I hope I’ts Help You Exam.

Choose the right answer from the subsequent choices:

01- The process of gaseous exchange involves;

  1. Breakdown of C-H bonds to yield energy
  2. Physical movements that take air in and out of body
  3. Getting oxygen from the air and removing CO2
  4. Transport of oxygen by the blood to different parts of the body

02- Most of the gaseous exchange during a leaf occurs through;

  1. Stomata
  2. General surface
  3. Cuticle
  4. Lenticels

03- How many bronchi are there within the air passageway?

  1. One
  2. Two
  3. Many
  4. None

04- Where does the gaseous exchange occur in humans?

  1. Trachea
  2. Bronchi
  3. Alveoli

05- Which structure actively helps in taking the air out of the lungs?
Nasal cavity

  1. Bronchus
  2. Bronchiole
  3. Diaphragm

06- The primary chemical stimulus for breathing is that the concentration of;

  1. Carbon dioxide in the blood
  2. Oxygen in blood
  3. Carbon dioxide in muscles
  4. Oxygen in muscles

07- Point out the falsehood about respiration;

  1. Gases can easily undergo the walls of the alveoli
  2. Gas exchange in the lungs is very efficient because the lungs provide a large area
  3. In emphysema, the walls of alveoli break and there’s more area
  4. Dust particles can damage the lung by irritating the inner alveoli surface

08- A disease involving the breakdown of air sacs of the lungs is;

  1. Pneumonia
  2. Bronchitis
  3. Asthma
  4. Emphysema

09- Which process doesn’t occur within the nasal cavity?
Trapping of huge dust particles

  1. Humidification of the inhaled air
  2. Warming of the inhaled air
  3. Exchange of gases

10- What sort of blood vessels surrounds the alveoli?

  1. Arteriole
  2. Capillary
  3. Vein

11- Antibiotics are used for the;

  1. Treatment of viral infections
  2. Treatment of bacterial infections
  3. Immunization against infections\
  4. Both ’1 and ’2’

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

  1. Medicinal drugs
  2. Narcotics
  3. Hallucinogens
  4. Sedatives

13- Aspirin is categorized as;

  1. A drug from animals
  2. A synthetic drug
  3. A drug from plants
  4. A drug from minerals

14- The drugs wont to reduce pain are known as;

  1. Analgesics
  2. Antiseptics
  3. Antibiotics
  4. Sedatives

15- Which of the subsequent drugs is obtained from plants?

  1. Aspirin
  2. Opium
  3. Cephalosporin
  4. Insulin

16- Which of those addictive drugs also are used as painkillers?

  1. Narcotics
  2. Sedatives
  3. Hallucinogens
  4. All are often used

17- Sulfonamides affect bacteria within the following way;

  1. Break the cell membrane
  2. Inhibit protein synthesis
  3. Stop the synthesis of the latest cell membrane
  4. Stop the synthesis of vitamin Bc

What is true about vaccines?

18- Protect against the longer-term viral and bacterial infections

  1. Treat the prevailing bacterial infections only
  2. Treat existing infections and also protect against future infections
  3. Protect against viral infections only

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