Question 1

Chlorophyll a absorb max of

Accepted Answer

Chlorophyll a differs from chlorophyll b as it has a methyl group at the C-7 position. It is a form of chlorophyll used in oxygenic photosynthesis. It absorbs most energy from wavelengths of violet-blue and orange-red light. It reflects green light.So, the correct answer is option B.

Question 2

In the bacterial photosynthesis, hydrogen donor is

Accepted Answer

Toppr Ask Answer

Question 3

During photosynthesis, the oxygen in glucose is from

Accepted Answer

Photosynthesis is the process of carbon fixation which mainly takes place in two steps, light reaction, and dark reaction. ATP and NADPH$_2$ are produced in the light reaction which is utilized for carbon fixation during the dark reaction. When the plant makes the glucose molecule, it gets the carbon and oxygen atoms it needs from carbon dioxide, which is taken from the air through the stomatal openings and hydrogen from water molecules.Oxygen from water molecule is released in the form O$_2$ during light reaction.So, the correct answer is option B.

Question 4

Green bacteria contain

Accepted Answer

Green bacteria are the photosynthetic bacteria. They have chlorobium chlorophyll-660 as their primary photosynthetic pigment. This pigment have spectra of absorption of light similar to Chl-a. The bacteria also have Chlorobium chlorophyll-650. These bacteria can absorb maximum at both the wavelengths. So, the correct answer is option C.

Question 5

Assertion : Phototropism is a directional growth movement.Reason : Phototrophic movement occur in the direction of light

Accepted Answer

Phototropism is a paratonic directional growth movement of curvature which is induced and determined by the direction of light stimulus. Shoots grow towards the source of light hence called positively phototropic while roots grow from the source of light hence called negatively phototropic.

Question 6

People who received Nobel Prizes for their work on green plants are

Accepted Answer

In 1961, Calvin was awarded the Nobel Prize in Chemistry for the discovery of Calvin Cycle, an intricate redox reaction that takes place in photosynthesizing plants. In 1970, Borlaug was awarded the Nobel Prize for his contributions to the development of high-yield agriculture in third-world countries around to the world.

Question 7

Maximum contribution of oxygen in environment is from

Accepted Answer

In nature, oxygen is produced by splitting of water molecule during light reaction of photosynthesis in a process called as photolysis. This oxygen is a necessary byproduct of photosynthesis. It is released by photosynthetic organisms. Phytoplankton are the major aquatic producers and most abundant photosynthetic organisms.

Question 8

The algae used by Calvin for photosynthetic research was

Accepted Answer

Calvin used green algae Chlorella for the major experiments related to photosynthesis. Calvin used C$^{14}$ isotope in Chlorella for knowing the path of carbon in photosynthesis.So, the correct answer is option A.

Question 9

Which factor is not limiting in normal conditions for photosynthesis?

Accepted Answer

Chlorophyll is not counted as a limiting factor of photosynthesis in normal conditions. It is because chlorophyll is a pigment, which is present in plants and not an external factor. It is involved in the trapping of light for the light dependant reaction of photosynthesis. The major limiting factors for photosynthesis are light intensity, temperature, and carbon dioxide levels.So, the correct answer is option D.

Question 10

Who received the Nobel Prize for working out the early carbon pathway of photosynthesis?

Accepted Answer

Melvin Calvin received Nobel Prize for working out the early carbon pathway of photosynthesis. It was shown that the carbon first binds to a molecule of ribulose 1,5-bisphosphate (RuBP), then immediately splits, forming two molecules of phosphoglycerate (PGA). So, the correct answer is 'Calvin'

Photosynthesis In Higher Plants

Biology
8230 Views

Chlorophyll a absorb max of

In the bacterial photosynthesis, hydrogen donor is

During photosynthesis, the oxygen in glucose is from

Green bacteria contain

Assertion : Phototropism is a directional growth movement.

Reason : Phototrophic movement occur in the direction of light

People who received Nobel Prizes for their work on green plants are

Maximum contribution of oxygen in environment is from

The algae used by Calvin for photosynthetic research was

Which factor is not limiting in normal conditions for photosynthesis?

Who received the Nobel Prize for working out the early carbon pathway of photosynthesis?

Photosynthesis In Higher Plants

Biology 8230 Views

Chlorophyll a absorb max of

In the bacterial photosynthesis, hydrogen donor is

During photosynthesis, the oxygen in glucose is from

Green bacteria contain

Assertion : Phototropism is a directional growth movement. Reason : Phototrophic movement occur in the direction of light

People who received Nobel Prizes for their work on green plants are

Maximum contribution of oxygen in environment is from

The algae used by Calvin for photosynthetic research was

Which factor is not limiting in normal conditions for photosynthesis?

Who received the Nobel Prize for working out the early carbon pathway of photosynthesis?

Biology
8230 Views

Assertion : Phototropism is a directional growth movement.

Reason : Phototrophic movement occur in the direction of light