(English Medium) ICSE Class 10 - CISCE Question Bank Solutions for Biology

The figure given below represents an experiment to demonstrate a particular aspect of photosynthesis. The alphabet ‘A’ represents a certain condition inside the flask.

(i) What is the aim of the experiment?
(ii) Identify the special condition inside the flask.
(iii) Name an alternative chemical that can be used instead of KOH.
(iv) In what manner do the leaves 1 and 2 differ at the end of the starch test?

The figure below represents an experiment performed to demonstrate a particular aspect of photosynthesis. The apparatus was kept in sunlight for almost the whole day. The numeral ‘1’ represents a certain condition inside the flask and the numeral ‘2’ represents a chemical responsible for this condition.
(i) What is the object of the experiment?
(ii) What is the special condition inside the flask?
(iii) What is the chemical substance numbered ‘2’?
(iv) In what way will the three leaves (A, B, and C) differ at the end of the experiment, when tested with iodine solution?

The figure below represents an experiment set up to study a physiological process in plants:

(i) Name the physiological process being studied.
(ii) Explain the process.
(iii) What is the aim of the experiment?
(iv) Give a well-balanced equation to represent the process.

 (i) Draw a neat and well-labelled diagram of the Chloroplast.
(ii) List the events taking place in the photo-chemical phase of Photosynthesis.
(iii) If you are planning an experiment to show the effect of light on photosynthesis :
(a) Will you select white light or green light? Justify your answer.
(b) Why would you select a destarched plant?

A well-watered healthy potted plant with variegated leaves was kept in darkness for about 24 hours. It was then set up as shown in the diagram and exposed to light for about 12 hours. At the end of this time, leaf X and leaf Y were tested for starch. Study the diagram and answer the questions that follow:
(i) Why was the plant initially kept in darkness for 24 hours?
(ii) What is the function of the sodium hydroxide solution in the flask?
(iii) Select the correct leaf from the five available choices shown in the diagram as A, B, C, D, and E. Rewrite the correct answer for the filling in the appropriate letter from the questions that follow:

1. After the starch test, leaf X would look like.
2. After the starch test, leaf Y would look like.

Draw a neat and well-labeled diagram of the Chloroplast.

Explain the term Photophosphorylation.

Explain the term Carbon cycle.

Name the following:

The principal site in a green leaf for photosynthesis.

Give technical term:

Name the structure where photophosphorylation takes place.

Complete the following sentence with appropriate word:

The conversion of the physical energy of light into chemical energy by the chloroplast is called ____________.

Complete the following sentence with appropriate word:

Calvin cycle was proposed by __________.

Mention, if the following statement is True or False. If false rewrite the wrong statement in its correct form:

Too much light destroys chlorophyll.

Mention, if the following statement is True or False. If false rewrite the wrong statement in its correct form:

PhotoLysis is the reaction which means the breaking up of water molecules.

Mention, if the following statement is True or False. If false rewrite the wrong statement in its correct form:

Out of nine types of chlorophyll, chlorophyll ‘a’ and ‘b’ are most abundant.

Mention, if the following statement is True or False. If false rewrite the wrong statement in its correct form:

 Photosynthesis occurs only in plants.

Mention, if the following statement is True or False. If false rewrite the wrong statement in its correct form:

The unit of light absorbed by the chlorophyll during photosynthesis is the proton.

Mention, if the following statement is True or False. If false rewrite the wrong statement in its correct form:

The process of photosynthesis takes place in the dark.

Mention, if the following statement is True or False. If false rewrite the wrong statement in its correct form:

CO₂ is the life-supporting gas produced due to photosynthesis.

Mention, if the following statement is True or False. If false rewrite the wrong statement in its correct form:

Photosynthesis results in loss of dry weight of the plant.