Functions of the Leaf

Q.

Write two significances of photosynthesis.

Q.

Which one of the following is a function of leaves?

1. Photosynthesis

2. Transpiration

3. Both A and B

4. Support fruits

Q. The process by which the green plants make their own food using simple raw materials like carbon dioxide and water in the presence of sunlight is called as ___

Q.

The optimum temperature at which the photosynthesis occurs best is around

1. 30 °C

2. 65 °C

3. 100 °C
   

4. 45 °C

Q.

How do the plants know how much food the need and where the left food goes

Q. Photosynthesis is the process by which plants prepare their food. Identify the correct statement(s) about photosynthesis.

1. Carbon dioxide and water are produced at the end of photosynthesis.
2. Neither A nor B are correct
3. Oxygen and glucose are used as the raw materials for photosynthesis.
4. Both A and B are correct.

Q. Food produced after photosynthesis is stored mainly in the form of ______.

1. minerals
2. starch
3. glucose
4. proteins

Q. Food produced after photosynthesis is stored mainly in the form of ______.

1. starch
2. proteins
3. glucose
4. minerals

Q. Which equation best represents photosynthesis in plants?

1. Carbon dioxide $+$ water$\to$ starch $+$ oxygen
2. Carbon dioxide $+$ water$\to$ glucose $+$ oxygen
3. Glucose $+$ oxygen $\to$ carbon dioxide $+$ water
4. Carbon dioxide $+$ glucose $\to$ starch $+$ oxygen
5. Light $+$ carbon dioxide $\to$ glucose $+$ oxygen

Q. Which of the following is not the correct statement for photosynthesis?

1. Plants prepare food not only for themselves but also for animals.
2. Gives out oxygen produced from the by-products.
3. Carbon dioxide is utilised during photosynthesis.
4. All of the above

Q.

Q. Which of the following is NOT needed for photosynthesis?

1. Alcohol
2. Carbon dioxide
3. Chlorophyll
4. Water

Q. Food produced after photosynthesis is stored mainly in the form of ______.

1. proteins
2. minerals
3. glucose
4. starch

Q. Which of the following is the wastes secreted from plant?

1. Gums
2. Fruits
3. Resin
4. Carbon dioxide

Q. In photosynthesis, plants

1. Absorb O${}_2$ and release CO${}_2$
2. Absorb CO${}_2$ and release O${}_2$
3. Absorb NH${}_3$ and release N${}_2$
4. Absorb N${}_2$ and release NH${}_3$

Q. Application based questions:
Why photosynthesis is important to us? Give two reasons.