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Question
Define the following term:
Chloroplast
Solution
Chloroplasts are indeed miniature ovoid structures that are encased in a double membrane. Nevertheless, the response could offer a more succinct definition: Chloroplasts are the cellular organelles that are responsible for the process of photosynthesis in plant cells. They are the sites where photosynthesis occurs and contain thylakoids.
RELATED QUESTIONS
Chlorophyll in a leaf is required for
Differentiate Between:
Autotrophs and Heterotrophs.
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?
(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.
Explain the term Carbon cycle.
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:
Photosynthesis occurs in all the cells of a plant.
Given below are groups of terms. The first pair indicates the relationship between the two terms. Complete the second pair accordingly.
Chlorophyll : Magnesium : : Haemoglobin : ______
Write the exact location of chloroplasts in the parts of a plant.
