Photosynthesis Process

Q.

What is food?

Q.

Light reaction and dark reaction of photosynthesis take place in ___ respectively.

1. stroma and grana

2. stroma and lamellae

3. grana and stroma

4. thylakoid and double membrane

Q.

During the process of photosynthesis, solar energy is converted into ___.

1. heat energy

2. radiant energy

3. chemical energy

4. thermal energy

Q.

What are lenticels in plants and what is their function?

Q.

Which part of the plant is called as the food factory?

1. Roots

2. Leaves

3. Fruits

4. Flowers

Q.

Question 1
Why do organisms need to take food?

Q.

Which of the following statements is/are correct?
(i) All green plants can prepare their own food.
(ii) Most animals are autotrophs.
(iii) Carbon dioxide is not required for photosynthesis.
(iv) Oxygen is liberated during photosynthesis.

1. (i) and (iv)
   

2. (ii) only
   

3. (i) and (ii)

4. (ii) and (iii)
   

Q.

During the process of photosynthesis, light energy is converted to chemical energy.

1. True

2. False

Q. What are the basic components required for photosynthesis? Mention where these components are used. [3 MARKS]

Q.

Why photosynthesis do not occur in animal cells?

Q.

Which of the following is the source of oxygen that is released during photosynthesis?

1. carbon dioxide

2. water

3. chlorophyll

4. glucose

Q.

The chemical equation for photosynthesis is _____.

1. oxygen+ water $\underrightarrow{chlorophyll,sunlight}$ carbon dioxide+ glucose
   

2. water + carbon dioxide $\underrightarrow{chlorophyll,sunlight}$ glucose + oxygen
   

3. carbon dioxide + oxygen $\underrightarrow{chlorophyll,sunlight}$ water+ glucose

4. oxygen + water $\underrightarrow{chlorophyll,sunlight}$ glucose + carbon dioxide
   

Q.

Plants store glucose in the form of insoluble starch in leaves.

1. False

2. True

Q.

Does photosynthesis produce ATP?

1. True
2. False

Q. Why are ATP molecules called the energy currency of the cell?

Q.

What are 3 ways we use ATP?

Q.

What is ATP and why it is called the currency of energy?

Q. Choose the correct option with respect to the sequence of events which occurs during photosynthesis.

1. Reduction of carbondioxide to carbohydrates.
2. Conversion of light energy to chemical energy.
3. Splitting of water molecule.

1. 3 $\to$ 1 $\to$ 2
2. 1 $\to$ 2 $\to$ 3
3. 2 $\to$ 1 $\to$ 3
4. 2 $\to$ 3 $\to$ 1

Q.

How do humans benefit from biodiversity?

Q. Which of the following always involves the process of diffusion?
A. The movement of minerals from the soil into root hair cells.
B. The movement of water into the cells of living things.
C. The movement of dissolved oxygen from the surrounding water into an amoeba.
D. The movement of carbon dioxide from the air into leaf cells.

1. Only A and C
2. Only A and B
3. Only B and C
4. Only C and D

Q.

Explain the statement using one word:

A cow is dependent on plants for its food.

Q.

Plants lose water through their aerial parts by a process called ____.

1. transpiration

2. diffusion

3. active transport

4. osmosis

Q.

The oxygen molecule in glucose formed during photosynthesis comes from ______.

1. Water

2. Organic acids

3. Glucose

4. CO₂

Q.

Why does photorespiration not occur in CAM plants?

Q.

As per Cornelius Van Niel, where did O₂ evolve from in green plants?

Q.

During photosynthesis, light energy is converted into ___________ energy.

Q.

The sunlight is used during photosynthesis to:

1. transport water and minerals in the plant

2. break down the water molecules

3. open the guard cells

4. break down the cell wall

Q.

From where do humans obtain their food?

Q.

Green plants convert carbon dioxide into glucose in the presence of sunlight.

1. True

2. False

Q.

In which one of the following form is glucose stored in plants?

1. Starch

2. Fructose

3. Protein

4. Fat