C3 Cycle

Q.

What are the raw materials for photosynthesis?

Q. The first stable product formed during calvin cycle in $C_3$ plants is:

1. 2 carbon compound
2. 6 carbon compound
3. 5 carbon compound
4. 3 carbon compound

Q.

How do plants obtain food?

Q. The main ingredients of photosynthesis are:

1. n(${\text{CH}}_2\text{O}$), light and ${\text{CO}}_2$
2. Chlorophyll, light, ${\text{CO}}_2$, ${\text{H}}_2\text{O}$
3. Chlorophyll, ${\text{O}}_2$, Light, ${\text{H}}_2\text{O}$
4. Chlorophyll, ${\text{CO}}_2$, ${\text{O}}_2$, ${\text{H}}_2\text{O}$

Q.

Name the requirements for the process of photosynthesis.

Q.

Why is sunlight important for photosynthesis?

Q.

Photosynthesis requires chlorophyll and a few other raw materials. Add the missing raw materials to the list given below:

Water, minerals, _________, and __________.

Q.

What will happen if a green plant does not get sunlight? Describe the process in which sunlight plays a very important role in the life of a plant.

Q. The total requirement of ATP & NADPH for each molecule of ${\mathrm{CO}}_2$ fixed & reduced in photosynthesis in the Calvin cycle is:

1. 2 ATP & 2 NADPH
2. 2 ATP & 3 NADPH
3. 3 ATP & 2 NADPH
4. 4 ATP & 3 NADPH

Q. Which of the following products of the light reaction are subsequently used during the biosynthetic phase of photosynthesis?

1. Electrons and photons
2. Water and carbon
3. ATP and NADPH
4. Carbon dioxide and RuBP

Q. ________ was used by Calvin for his research to understand the light independent reactions of photosynthesis.

1. Pteridophyte
2. Angiosperm
3. Bryophyte
4. Algae

Q.

Green plants use carbon dioxide and water to prepare starch in the presence of sunlight by a process called __________.

Q.

The immediate end product of photosynthesis is _______.

Q.

If 5 molecules of glucose respired aerobically and another 5 molecules anaerobically, what is the total number of ATP and $C{O}_2$ molecules expected form these reactions?

1. 200 ATP and 60 $C{O}_2$

2. 140 ATP and 40 $C{O}_2$

3. 200 ATP and 40 $C{O}_2$

4. 190 ATP and 36 $C{O}_2$

Q. In $C_3$ plants, the first stable product of photosynthesis during the dark reaction is:

1. Oxaloacetic acid
2. 3-phosphoglyceric acid
3. Phosphoglyceraldehyde
4. Malic acid

Q. During photosynthesis, the carbon dioxide fixation reaction takes place in

1. cytoplasm
2. thylakoids
3. stroma of chloroplast
4. mitochondria

Q. The Calvin Cycle does not involve

1. regeneration of RuBP
2. ATP consumption
3. ATP and NADPH synthesis
4. carbon dioxide fixation

Q.

Glucose and starch in plants are produced by the process of Photosynthesis.

1. True
2. False

Q. How many molecules of ATP and NADPH are utilized for the regeneration of one RuBP molecule?

1. 1 ATP and 1 NADPH
2. 1 NADPH only
3. 1 ATP only
4. 2 ATP and 2 NADPH

Q. PGA as the $C{O}_2$ fixation product was discovered in photosynthesis of:

1. Bryophyte
2. Gymnosperm
3. Angiosperm
4. Algae

Q.

Solar energy is converted into chemical energy during photosynthesis.

1. True
2. False

Q.

Number of calvin cycles required to generate a molecule of hexose is

1. 2

2. 4

3. 6

4. 8

Q.

How many carbon atoms are in a molecule of RuBP?

1. five

2. one

3. two

4. three

Q. Which is the first stable product formed during the Calvin cycle?

1. Glyceraldehyde-3-phosphate
2. 3-phosphoglycerate
3. Triose phosphate
4. RuBP

Q. How many ATP molecules are utilised during the carboxylation stage of Calvin cycle?

1. 2
2. 11
3. 3
4. None

Q. Who of the following biologists was awarded 1961 Nobel prize for elucidating the sequence of dark reaction of photosynthesis?

1. Melvin Calvin
2. van Niel
3. Blackman
4. R. Hill

Q.

The product of photosynthesis is not a protein.

1. True
2. False

Q.

The molecule which is regenerated in calvin cycle for continuation of cycle is RuBisCo.

1. True
2. False

Q.

The molecule which is regenerated in calvin cycle for continuation of cycle is RuBisCo.

1. True
2. False

Q. Which enzyme fixes CO₂ in Calvin cycle?

1. PEP carboxylase
2. Carbonic anhydrase
3. RUBP carboxylase
4. Hexokinase