Q. No.Carbon dioxide is necessary for photosynthesis. The chemical used to remove this gas most effectively from entering a control apparatus is
1. calcium oxide
2. distilled water
3. potassium hydroxide solution
4. sodium carbonate.
Photosynthesis in C4 plants is relatively less limited by atmospheric CO2 levels because
| 1. | The primary fixation of CO2 is mediated via PEP carboxylase |
| 2. | Effective pumping of CO2 into bundle sheath cells |
| 3. | Four carbon acids are the primary initial CO2 fixation products |
| 4. | RuBisCO in C4 plants has a higher affinity for CO2 |
The chemiosmotic coupling hypotheisis of oxidative phosphorylation proposes that adenosine triphosphate (ATP) is formed because
| 1. | a proton gradient forms across the inner mitochondrial membrane. |
| 2. | There is a change in the permeability of the inner mitochondrial membrane towards adenosine diphosphate (ADP). |
| 3. | high energy bonds are formed in mitochondrial proteins |
| 4. | ADP is pumped out of the matrix into the intermembrane space. |
Which of the following is incorrect about the light reactions of photosynthesis?
| 1. | P680 and P700 are the reaction centres of PS-I and PS-II respectively |
| 2. | Light energy provides energy for the photolysis of water through excitation of the reaction centre of PS-II |
| 3. | NADPH is not produced in cyclic electrons transport in light reactions |
| 4. | Reactions of the two photosystems are needed for the reduction of NADP |
In blue-green algae, photosystem- II contains important pigment concerned with photolysis of water. It is a
1. phycocyanin
2. cytochrome-c
3. chlorophyll -
4. -carotene
In Kranz anatomy, the bundle sheath cells have
| 1. | thin walls, many intercellular space and no chloroplast |
| 2. | thick walls, no intercellular spaces and large number of chloroplasts |
| 3. | thin walls, no intercellular spaces and several chloroplasts |
| 4. | thick walls, many intercellular space and few chloroplasts |
The C4 plants differ from C3 plants with reference to the:
| 1. | substrate that accepts CO2 in carbon assimilation |
| 2. | type of end product |
| 3. | type of pigment involved in photosynthesis |
| 4. | end product that will be formed |
Match the Columns.
|
Column I (Scientists) |
Column II (Discoveries) |
|
A. Stephen Hales |
1. Importance of light and chlorophyll |
|
B. Ingen Housz |
2. Presence of chlorophyll in plants. |
|
C. Von Mohl |
3. Product of photosynthesis is starch. |
|
D. Sach |
4. Air and light control plant growth. |
Code
|
|
A |
B |
C |
D |
|
(1) |
4 |
1 |
2 |
3 |
|
(2) |
3 |
2 |
1 |
4 |
|
(3) |
2 |
3 |
4 |
1 |
|
(4) |
4 |
3 |
2 |
1 |
Photosynthesis is a-
a. Biochemical process
b. Physical process
c. Chemical process
d. Physico-chemical process
Which of the following statements does not justify the importance of photosynthesis?
| 1. | it is the primary source of all food on earth. |
| 2. | it is responsible for the release of oxygen into the atmosphere. |
| 3. | it is responsible for the water balance on earth. |
| 4. | use of energy from sunlight by plants doing photosynthesis is the basis of life on earth. |
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