Question

A. Fill i n the blanks with suitable words.
1. Chlorophyll traps energy from nutrition is found in nongreen

plants.

3. The occurrence of photosynthesis can

be confirmed by testing the presence of in the leaf. 4. Starch turns colour of from purple

to bluish-black.

B. Give one word for the following:

1. Green plants that prepare their own food

2. Microscopic openings on the under surface of leaf 3. Hydrolysis of water into H* and OH ions with

the use of solar energy

4. End product of photosynthesis

5. Presence of starch in the leaves is tested using iodine solution.

C. Encircle the odd one out and give reasons for your choice.

1. Protein, starch, cellulose, glucose

2. Starch, Iodine, caustic soda

3. Chlorophyll, stomata, sulphur, carbon dioxide

4. Leaves, chloroplasts, chlorophyll, roots

D. Ansvier the following:

1. Why is glucose converted into starch immediately after its formation in the cells?

2. Too much bright light and high temperature3, Chlorophyll is contained in chloroplasts. 4. Optimum temperature for photosynthesis is

5. Presence of starch in the leaves is tested using iodine solution.

G. Multiple Choice Questions, 1. This is the milk sugar.

(a) Starch

(c) Sucrose

(b) Lactose

(d) Glucose

2. This is used to test the presence of starch in food.

(a) lodine solution

(b) Copper sulphate solution

(c) Caustic soda

(d) Benedict's solution

3. Which set is correct for photosynthesis? (a) Carbon dioxide, sunlight, oxygen, chlorophyll

(b) Nitrogen, water, carbon dioxide,

chlorophyll (c) Carbon dioxide, water, sunlight,

chlorophyll

(d) Oxygen, nitrogen, water, chlorophyll 4. The green pigment in the leaves is

(a) Chloroplast

(b) Chlorophyll

(c) Anthocyanin (d) Phycoerythrin

5. Stomata are pores present on the surface of leaves surrounded by

(a) Guard, cells(b) Epidermal cells

(c) Mesophyll cells

(d) None of these​

Answer 1

Answer:

Definition of photosynthesis -

The process of making food by Green plants (autotroph) is called photosynthesis. For performing photosynthesis water, sunlight and carbon dioxide are used by the plants.

They take sunlight from sun, water from soil and carbon dioxide gas from the air present around us. The leaves have small holes called stomata which allows air to enter the plant. Leaves also contains chlorophyll in them which traps sunlight and helps in making food. Roots of plants absorbs water and Minerals from the soil and transfers them leaves through stem.

The chemical equation for the photosynthesis

is -

carbon dioxide + water -> glucose + oxygen + energy

Answer 2

Answer:

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