Respiration in Plants

Q.

Why plants keep their stomata closed at night?

Q. Plants give out a gas during photosynthesis which humans breathe in. What is this gas called?

1. Carbon dioxide
2. Oxygen
3. Sulfur
4. Nitrogen

Q. During photosynthesis, plants take in carbon dioxide and give out oxygen, through small openings called ________.

1. stomata
2. chlorophyll
3. trunk
4. roots

Q. What are breathing Roots or Pneumatophores?

Q.

How do ants breathe?

Q.

Chlorophyll is the pigment which is responsible for the green colour of plants and is found in ___

1. Cytoplasm

2. Mitochondria

3. Vacuoles

4. Chloroplast

Q.

The rate of respiration is very fast in plants and slow in animals

1. False

2. True

Q. In thick woody stems, gaseous exchange takes place through ______________.

1. stomata
2. lenticels
3. tracheae
4. spiracles

Q. Identify the correct statement with respect to photosynthesis.

1. Plants absorb carbon dioxide at night
2. Conversion of chemical energy to light energy
3. Sunlight is broken down into chlorophyll
4. Reduction of carbon dioxide to carbohydrates.

Q.

The plant cell wall is made up of ..........................

1. Lipids

2. Proteins

3. Starch

4. Cellulose

Q.

The process in which light energy is converted into chemical energy is called

1. Photorespiration

2. Photophosphorylation

3. Photosynthesis

4. Phototropism

Q.

When the guard cells lose water, they lose their turgidity and the stomata

1. open.

2. close.

3. remains same.

4. Disappears.

Q.

Which process depends on diffusion?

Q. Why is sunlight important? Can you tell me with the help of an activity?

Q. plants does not do the photosynthesis process at the night.They take in oxygen at that time. So how are we able to get oxygen at night?

Q. Is oxygen is the waste material of a plant?

Q.

18. Give a biochemical reaction depicting the participation of water.

Q. Choose the correct statements from the following:

A) Stomata are responsible for gaseous exchange in leaves and in some stems.
B) Lenticels are responsible for gaseous exchange in woody stems.
C) Stomata are responsible for gaseous exchange in roots.

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

Q.

The image shows a magnified part of a caterpillar. The tiny openings shown in the above figure help the caterpillar breathe. What are they called?

1. Trachea

2. Spiracles

3. Tracheoles

4. Nostrils

Q.

What is the difference between the oxygenic and inoxygenic photosynthesis?

Q.

If we intend to observe stomata in a temporary stained mount of leaf peel, the leaf should taken preferably from a plant growing in

1. In shade.

2. In sunlight.

3. In water.

4. In dark room.

Q.

Given below are five sets of terms. In each case arrange and rewrite each set so as to be in a logical sequence.
Guard cells, Epidermal cells, stoma, Cuticle, Palisade cells.

Q. The food synthesised by the plants is stored as

1. Protein
2. Starch
3. Vitamins
4. Dietary fiber

Q. Which one of the following is an endproduct of photosynthesis?

1. Lactose
2. Glucose
3. Fructose
4. Cellulose

Q. Plants carry out photosynthesis only during the day and respiration only at night. [1 mark]

(a) True
(b) False

Q.

The main constituent of cell wall in a plant is ______.

1. proteins

2. cellulose

3. sugars

4. starch

Q.

Respiration is an anabolic process.

1. True
2. False

Q.

Which structures in the leaves of plants are responsible for exchange of oxygen and carbon dioxide?

1. Pores

2. Chlorophyll

3. Leaves

4. Stomata

Q. What is the importance of respiration in living organisms?

Q. what is cell wall ? what are its function? explain