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Physiology of Respiration

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Question

The following diagram refers to an apparatus which is used to demonstrate a physiological process:
(b) Why has the coloured water risen in tubing 1

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Solution

Germinating seeds undergo respiration, utilizes all the oxygen to generate carbon dioxide in test tube 1 which is absorbed by potassium hydroxide due to which a vacuum is created.

This vacuum space sucks the water from the coloured water flask and hence the level of the water rises in test tube 1.

The increase in the level of water is a sign of respiration taking place.

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Similar questions

Q. An experimental set-up to demonstrate respiration in germinating seeds is shown here. It is observed that water from the beaker has not risen into the delivery tube (bent tube). This is because :

(1) the set-up is airtight
(2) the beaker has coloured water
(3) carbon dioxide is not being absorbed
(4) no oxygen is available to seeds for respiration

The diagram below shows two test-tubes A and B. Test-tube A contains a green water plant. Test-tube B contains both a green water plant and a snail. Both Test-tubes are kept in sunlight. Answer the questions that follow :

(a) Name the physiological process that releases the bubbles of oxygen.

(b) Explain the physiological process as mentioned above in Q.2(a) (i).

(c) What is the purpose of keeping a snail in test-tube 'B' ?

(d) Why does test-tube 'B' have more bubbles of oxygen ?

(e) Give an example of a water plant that can be used in the above experiment.

(f) Write the overall chemical equation for the above process.

The following diagram refers to an apparatus which is used to demonstrate a physiological process :

(a) What is the purpose of keeping potassium hydroxide solution in the test tubes X and Y ?

(b) Why has the coloured water risen in tubing 1 ?

(c) What is the purpose of keeping boiled peas soaked in a disinfectant in test tube Y ?

(d) Name the biological process which causes the above rise.

(e) Define the biological process shown in the experiment.

Q. STRUCTURED/APPLICATION/SKILL TYPE
The following diagram refers to an apparatus which is used to demonstrate a physiological process :
(a) What is the purpose of keeping potassium hydroxide solution in the test tubes X and Y?
(b) Why has the coloured water risen in tube 1?
(c) What is the purpose of keeping boiled peas soaked in a disinfectant in test tube Y?
(d) Name the biological process which causes the above rise.
(e) Define the biological process shown in the experiment.

Q. The following diagram refers to an apparatus which is used to demonstrate a physiological process:
(c) What is the purpose of keeping boiled peas soaked in a disinfectant in test tube Y?

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Physiology of Respiration

Standard X Biology

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