Respiration

Q. Which of the following type of energy is used by living organisms to perform vital life processes? Kinetic energy, Chemical energy, Potential energy, Nuclear energy

Q. In human body, lungs are located in the _____ cavity.

1. thoracic
2. chest
3. pelvic
4. abdominal

Q.

The process of respiration takes place partially in the __________ and partially in the mitochondrion of the cell.

Q.

What are 3 ways cells use energy?

Q.

The exchange of gases during respiration and photosynthesis take place by ______.

(osmosis/diffusion)

Q.

Which of the following is correct for respiration in plants?

1. Respiration takes place only during day time

2. Respiration takes place only during the night

3. Respiration takes place both during the day and night

4. Respiration takes place only when plants are not making food

Q.

Which gas in the atmosphere is essential for respiration?

Q.

Name a waste gas released by the plants​

(b) only during the night time.​

Q. Given below is the diagram of an experimental set-up :

(d) Would you take any step before starting the experiment? Describe this step and explain its necessity.

Q. Cellular respiration is a physical process by which mitochondria breaks down glucose in the presence of oxygen.

1. True
2. False

Q. What is the name of those cells in the leaf of a plant which control the opening and closing of stomata?

Q. The process involving the breakdown of food to release energy is known as .

1. breathing
2. circulation
3. respiration

Q. Which of the following statements is correct with respect to photosynthesis and respiration in plants?

1. Respiration takes place both during day and night time.
2. Respiration takes place when plant is not performing photosynthesis.
3. During respiration plants take in carbon dioxide and release oxygen.
4. Rate of photosynthesis is maximum during night time.

Q. Respiration is an exothermic process.

1. True
2. False

Q.

Is a high respiratory quotient good?

Q. Which of the following characteristics make the human lung an efficient respiratory surface?

1. Thin walls for diffusion
2. Large surface area
3. Moist air sacs
4. All of the above

Q. Which of the following processes helps us to obtain energy from the food we eat?

1. Circulation
2. Respiration
3. Breathing
4. Movement

Q.

Which of the following is a common feature of both aerobic and anaerobic respiration?

1. Glucose is broken down in both processes.

2. Both occur in absence of oxygen.

3. Both occur in presence of oxygen.

4. Both release the same amount of energy.

Q. The chemical used to absorb carbon dioxide during a test to check for the significance of carbon dioxide in photosynthesis is

1. potassium hydroxide
2. sodium chloride
3. iodine
4. potassium iodide

Q.

differentiate between breathing and respiration

Q. Respiration in insects is called direct because

1. The tissuse exchange $O_2/C{O}_2$ directly with CO elomic fluid
2. The cell exchange $O_2/C{O}_2$ directly with the air in the tubes
3. The tissuse exchange $O_2/C{O}_2$ directly with the air outside through body surface
4. Tracheal tubes exchan ge $O_2/C{O}_2$ directly with the haemocoel which then exchange with tis sues

Q. Division of mammalian lungs into a very large number of tiny alveoli around alveolar ducts opening into bronchioles, is

1. An inefficient system of ventilation of alveoli though with very little residual air
2. An inefficient system of ventilating the alveoli resulting in very high percentage of residual air in the lungs
3. A very efficient system of ventilating the alveoli with no residual air
4. An efficient system of ventilation of alveoli with little or no residual air

Q. (b) Name a gas produced in photosynthesis.

Q. Process-I : Glucose → Pyruvate $\underset{}{\overset{\text{Lack of oxygen}}{\to }}$ Lactic acid + Carbon dioxide


Process-II : Glucose → Pyruvate $\underset{\text{oxygen}}{\overset{\text{Presence of}}{\to }}$ Ethanol + Water + Energy


After interchanging the underlined words in the given processes,

दी गयी प्रक्रियाओं में रेखांकित शब्दों के स्थान को एक-दूसरे से बदलने के बाद,

1. Only Process-I will become correct
   
   केवल प्रक्रिया-I सही हो जाएगी
2. Only Process-II will become correct
   
   केवल प्रक्रिया-II सही हो जाएगी
3. Both the processes will become correct
   
   दोनों प्रक्रियाएँ सही हो जाऐंगी
4. Both the processes will become incorrect
   
   दोनों प्रक्रियाएँ गलत हो जाऐंगी

Q. Arrange the following in correct order through which the air flows upto alveoli
Larynx, alveoli, trachea, pharynx, external nostrils, internal nostrils, nasal cavities.

Q. In anaerobic respiration, the pyruvic acid in muscle will form

1. Lactic acid ($C_3{H}_5{O}_3$)
2. Alcohol ($C_2{H}_{5}OH$)
3. Acetaldehyde
4. Acetyl CoA

Q. In mammals, the efficiency of ventilation of lungs as compared to reptiles and birds is better developed due to the presence of:

1. Ribs and costal muscles
2. Only ribs
3. Only costal muscles
4. Diaphragm

Q. Which of the following characteristics make the human lung an efficient respiratory surface?

1. Thin walls for diffusion
2. Large surface area
3. Moist air sacs
4. All of the above

Q. At the time of expiration, diaphragm becomes

1. Normal
2. Dome-shaped
3. Oblique
4. Flattened

Q. Respiration in plants happens:​

1. Both during the day and night​
2. Only at night​
3. Only during the day​