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प्रश्न
Some sugar solution is taken in a test-tube and a little of substance X in powder form is added to it. The mouth of test-tube is closed with a cork and allowed to stand for sometime. On opening the cork, a characteristic smell of substance Y is obtained and a gas Z is also observed to be formed. The gas Z extinguishes a burning matchstick.
(a) What could be (i) X, (ii) Y, and (iii) Z?
(b) What is the process of converting sugar into substance Y by the action of X known as?
(c) What type of respiration is exhibited by X in the above process?
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उत्तर
(a) (i) X is yeast. (ii) Y is ethanol. (iii) Z is carbon dioxide.
(b) Fermentation is the process of converting sugar into substance Y by the action of X.
(c) Anaerobic respiration is exhibited by X in the above process.
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संबंधित प्रश्न
List the differences between aerobic and anaerobic respiration.
Define breathing. State the differences between breathing and respiration.
What are the major organs of respiratory system in man (or humans)?
Which of the following is the correct sequence of air passage during inhalation?
(a) nostrils → larynx → pharynx → trachea → lungs
(b) nasal passage → trachea → pharynx → larynx → alveoli
(c) larynx → nostrils → pharynx → lungs
(d) nostrils → pharynx → larynx → trachea → alevoli
The two organisms which breath only through their moist skin are:
The photosynthesis in a plant is not taking place during the day time if the plant is releasing:
Consider the following chemical reactions which take place in different organisms/tissues under various conditions:
(i) Glucose → Respiration ">Ethanol + Carbon dioxide + Energy
(ii) Glucose→ Respiration ">Carbon dioxide + Water + Energy
(iii) Glucose → Respiration "> Lactic acid + Energy
(a) Name one organism which respires according to equation (i) above.
(b) Name one organism which respires according to equation (ii) above.
(c) When and where does respiration represented by equation (iii) above take place?
(d) Which equation/equations represent aerobic respiration?
(e) Which equation/equations represent anaerobic respiration?
(f) Which of the above reactions produces the maximum amount of energy?
What happens to the glucose which enters the nephron tubule alongwith the filtrate?
It has been found that people living in very high mountains have many more red corpuscles in their blood than people living in plains. Which one of the following best accounts for this phenomenon?
Choose the odd one out in the following groups of four items each:
Trachea, Ciliated epithelium, Mucous, Diffusion
Name the body structure concerned with the given functional activity:
Transports oxygen to the body cells.
State one function of the following:
Mitochondria
State one function of the following:
Diaphragm
Match the items in Column A with those in Column B.
|
Column A |
Column B |
|
Cartilaginous |
Epiglottis |
|
Large surface area |
Diaphragm |
|
Breathing movements |
Bronchi |
|
Voice |
Alveoli |
|
Complemental air |
Larynx |
|
Swallowing |
Extra inhalation |
How is the respiratory passage kept free of dust particles?
Give suitable explanation for the following :
Why does a person feel breathlessness at higher altitudes?
Air that enters through the nose passes into this tube.
On a very cold morning, Boojho and Paheli were talking with each other as they walked down to their school. They observed that the air coming out of their mouth looked like smoke. They were amused and wondered how it happened. Help them find the answer.
With the reference to four gases CO2, CO, Cl2 and O2, which one of the options in the table is correct?
List the similarities between aerobic and anaerobic respiration.
