Advertisements
Advertisements
Question
What is photosynthesis and wherein a cell does occur?
Advertisements
Solution
Photosynthesis is a process in which the green plants use sunlight and the green pigment chlorophyll, to synthesize, nutrients from carbon dioxide from air and water. Photosynthesis occurs in green parts of the plant such as leaves, stems, and floral buds.
APPEARS IN
RELATED QUESTIONS
The process of conversion of ADP into ATP during photosynthesis.
The diagram alongside represents an experiment conducted to prove the importance of a factor in photosynthesis.

Study the same and then answer the questions that follow:
(i) Name the factor being studied in his experiment.
(ii) Why was the plant kept in a dark room before conducting the experiment?
(iii}Why was the experimental leaf then kept in
1. boiling water 2. methylated spirit?
(iv) Name the solution used to test for the presence of starch in the leaf.
(v) What will we observe in the experimental leaf at the end of the starch test?
(vi) Give a balanced chemical equation to represent the process of photosynthesis.
A candidate studied the importance of certain factors in photosynthesis. He took a potted plant and kept in the dark for over 24 hours. In the early hours of the next morning, he covered one of the leaves with black paper in the centre only. Then he placed the plant in sunlight for a few hours and tested the leaf which was covered with black paper for starch.
Describe step by step, how the candidate proceeded to test the leaf for the presence of starch?
Oxygen given out during photosynthesis comes from water. Explain this statement.
Give technical term:
Organisms which cannot prepare their own food by photosynthesis.
Give technical term:
Name the tissue that transports manufactured starch from the leaves to all parts of the plant.
During photosynthesis, ________ is produced and stored in the leaf.
Plants may inhale carbon dioxide for photosynthesis but need ______ for their living.
Study the diagram given below and fill in the blanks with suitable words:

In order to prove that carbon dioxide is necessary for
(a) ______, a potted plant is placed in dark for 48 hours to (b) ______ the leaves. A part of a leaf is inserted into a conical flask containing potassium hydroxide solution. This is to absorb (c) ______ from the flask. The plant is then placed in sunlight for a few hours. The experimental leaf is tested for starch. The part of the leaf that was inside the conical flask turns (d) ______, whereas the part of the left outside turns (e) ______ in colour.
Given below are groups of terms. The first pair indicates the relationship between the two terms. Complete the second pair accordingly.
Producers : Autotrophs : : Consumers : ______
