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Test: Photosynthesis in Higher Plants - 2


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25 Questions MCQ Test Biology Class 11 | Test: Photosynthesis in Higher Plants - 2

Test: Photosynthesis in Higher Plants - 2 for NEET 2022 is part of Biology Class 11 preparation. The Test: Photosynthesis in Higher Plants - 2 questions and answers have been prepared according to the NEET exam syllabus.The Test: Photosynthesis in Higher Plants - 2 MCQs are made for NEET 2022 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Photosynthesis in Higher Plants - 2 below.
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Test: Photosynthesis in Higher Plants - 2 - Question 1

The chief pigment associated in process of photosynthesis is:

Detailed Solution for Test: Photosynthesis in Higher Plants - 2 - Question 1

Chlorophyll a, shows higher rate of photosynthesis. Hence, it is conclude that chlorophyll a is the chief pigment associated with photosynthesis.

Test: Photosynthesis in Higher Plants - 2 - Question 2

What does C6H12O6 represent in plant photosynthesis?

Detailed Solution for Test: Photosynthesis in Higher Plants - 2 - Question 2

The key features of plant photosynthesis were known, namely, that plants could use light energy to make carbohydrates C6H12Ofrom CO2 and water,  Where C6H12O6 represents glucose.

Test: Photosynthesis in Higher Plants - 2 - Question 3

Each photosystem has all the pigments forming light harvesting system also called as:

Detailed Solution for Test: Photosynthesis in Higher Plants - 2 - Question 3

Each photosystem has all the pigments (except one molecule of chlorophyll a) forming a light harvesting system also called antennae. These pigments help to make photosynthesis more efficient by absorbing different wavelengths of light.

Test: Photosynthesis in Higher Plants - 2 - Question 4

Which pigment absorbs the red and far red light?

Detailed Solution for Test: Photosynthesis in Higher Plants - 2 - Question 4

Phytochrome absorbs red of wavelength 660nm and far red of wavelength 730nm.

Test: Photosynthesis in Higher Plants - 2 - Question 5

The C4 plants show higher rate of photosynthesis in:

Detailed Solution for Test: Photosynthesis in Higher Plants - 2 - Question 5

The C4 plants respond to higher temperatures and show higher rate of photosynthesis while C3 plants have a much lower temperature optimum.

Test: Photosynthesis in Higher Plants - 2 - Question 6

The essential role of air in the growth of green plants is given by:

Detailed Solution for Test: Photosynthesis in Higher Plants - 2 - Question 6

Joseph Priestley (1733-1804) in 1770 performed a series of experiments that revealed the essential role of air in the growth of green plants. Priestley, you may recall, discovered oxygen in1774.

Test: Photosynthesis in Higher Plants - 2 - Question 7

Name the central element present in chlorophyll.

Detailed Solution for Test: Photosynthesis in Higher Plants - 2 - Question 7

The central element of chlorophyll contain Magnesium element.

Test: Photosynthesis in Higher Plants - 2 - Question 8

Carotenes protect plants from:

Detailed Solution for Test: Photosynthesis in Higher Plants - 2 - Question 8

Carotene is present in chloroplast along with chlorophyll pigment. This pigment protect the plants from photo-oxidation during photosynthesis at higher intensity of light.

Test: Photosynthesis in Higher Plants - 2 - Question 9

In photosynthesis, photolysis of water is used in:

Detailed Solution for Test: Photosynthesis in Higher Plants - 2 - Question 9

Photolysis of water is mainly carried out to compensate the electrons that are transferred to photosystem I by photosystem II during the non-cyclic photophosphorylation that reduce NADP+ into NADPH.

Test: Photosynthesis in Higher Plants - 2 - Question 10

ATP molecules required to synthesise one molecule of glucose by C4 pathways are:

Detailed Solution for Test: Photosynthesis in Higher Plants - 2 - Question 10

Synthesis of glucose molecules during photosynthesis involves the utilization of ATP molecules. In C4 plants, 30 ATP molecules are required to fix one molecule of glucose.

Test: Photosynthesis in Higher Plants - 2 - Question 11

The site in chloroplast which is responsible for trapping for light energy is:

Detailed Solution for Test: Photosynthesis in Higher Plants - 2 - Question 11

In chloroplast there is the membranous system consisting of grana, the stroma lamellae, and the fluid stroma. There is a clear division of labour within the chloroplast. The granum is responsible for trapping the light energy.

Test: Photosynthesis in Higher Plants - 2 - Question 12

Paper chromatography is technique to separate:

Detailed Solution for Test: Photosynthesis in Higher Plants - 2 - Question 12

Separation of leaf pigments of any green plant through paper chromatography. A chromatographic separation of the leaf pigment shows that the colour that we see in leaves is not due to a single pigment but due to four pigments: Chlorophyll a (bright or blue green in the chromatogram), chlorophyll b (yellow-green), xanthophylls (yellow) and carotenoids.

Test: Photosynthesis in Higher Plants - 2 - Question 13

The excitation of electrons,finally down-hill to NADP+ causing it tobe reduced to NADPH+2 is:

Detailed Solution for Test: Photosynthesis in Higher Plants - 2 - Question 13

Excitation of electrons, transfer to another accepter, and finally down-hill to NADP+ causing it to be reduced to NADPH+ H+ is called the Z scheme.

Test: Photosynthesis in Higher Plants - 2 - Question 14

For fixing one molecule of CO2 in Calvin cycle, required:

Detailed Solution for Test: Photosynthesis in Higher Plants - 2 - Question 14

Fixing of one molecule of carbon dioxide in Calvin cycle require 3 ATP and 2 NADPH2 as the source of energy. One NADPH2 molecule produces 3 molecules of ATP.

Test: Photosynthesis in Higher Plants - 2 - Question 15

Most abundant enzyme in the world:

Detailed Solution for Test: Photosynthesis in Higher Plants - 2 - Question 15

RuBisCO that is the most abundant enzyme in the world and is characterised by the fact that its active site can bind to both CO2 and O2 hence the name.

Test: Photosynthesis in Higher Plants - 2 - Question 16

Photosynthesis take place in:

Detailed Solution for Test: Photosynthesis in Higher Plants - 2 - Question 16

Photosynthesis takes place only in the green parts of the plants, mainly the leaves.

Test: Photosynthesis in Higher Plants - 2 - Question 17

The substances like ATP carry energy in:

Detailed Solution for Test: Photosynthesis in Higher Plants - 2 - Question 17

Living organisms have the capability of extracting energy from oxidisable substances and store this in the form of bond energy. Special substances like ATP, carry this energy in their chemical bonds.

Test: Photosynthesis in Higher Plants - 2 - Question 18

The photosystem II has reaction centre 680nm absorbs:

Detailed Solution for Test: Photosynthesis in Higher Plants - 2 - Question 18

While PS II has a P680 reaction centre that absorbs red light at 680 nm.

Test: Photosynthesis in Higher Plants - 2 - Question 19

In Photosynthesis energy from light reaction to dark reaction is transferred in the form of:

Detailed Solution for Test: Photosynthesis in Higher Plants - 2 - Question 19

ATP is formed in the first part of photosynthesis, (light reaction). In the second part of the cycle, known as dark reactions (or Calvin Cycle), which happens in the stroma of the plant, ATP (and NADPH) combine with CO2 and H2O to make glucose. The energy required in the dark reaction comes from ATP (and NADPH)

Test: Photosynthesis in Higher Plants - 2 - Question 20

Which of the following occurs in dark reaction of photosynthesis?

Detailed Solution for Test: Photosynthesis in Higher Plants - 2 - Question 20

A. The release of H2​ occurs in light reaction during the photolysis of water.

B. Synthesis of PGA/PGAL - occurs in dark reaction, it is a three-carbon compound which is the first stable product of the Calvin cycle.

C. Formation of ATP- occurs in light reaction.

D. The release of O2​- occurs in light reaction during photolysis of water.

Hence, the correct answer is 'Synthesis of PGA/PGAL'.

Test: Photosynthesis in Higher Plants - 2 - Question 21

Photosynthesis is maximum in

Detailed Solution for Test: Photosynthesis in Higher Plants - 2 - Question 21

There is maximum absorption by chlorophyll a, in the red region and so there is higher rate of photosynthesis.

Test: Photosynthesis in Higher Plants - 2 - Question 22

The stroma of chloroplast contains

Detailed Solution for Test: Photosynthesis in Higher Plants - 2 - Question 22

The dark reactions of photosynthesis is purely enzymatic and slower than the primary photochemical reaction. It takes place in stroma portion of the chloroplast and is independent of light i.e., it can occur either in presence or in absence of light provided that assimilatory power is available.

Test: Photosynthesis in Higher Plants - 2 - Question 23

Electrons from excited chlorophyll molecules of photosystem II to photosystem I transferred and finally

Detailed Solution for Test: Photosynthesis in Higher Plants - 2 - Question 23
  • In the photosystem II (PSII) reaction center, energy from sunlight is used to extract electrons from water.
  • The electrons travel through the chloroplast electron transport chain to photosystem I (PSI), which reduces NADP+ to NADPH.
  • The electron transport chain moves protons across the thylakoid membrane into the lumen.
Test: Photosynthesis in Higher Plants - 2 - Question 24

The number of Oxygen molecules released per photon or quantum of light is called

Detailed Solution for Test: Photosynthesis in Higher Plants - 2 - Question 24

Quantum yield is the number of Oxygen molecules released per photon or quantum of light. During light reaction of photosynthesis oxygen molecules are release during photolysis.

Test: Photosynthesis in Higher Plants - 2 - Question 25

The response of different organism to environment rhythms of light and darkness is called

Detailed Solution for Test: Photosynthesis in Higher Plants - 2 - Question 25
  • Photoperiodism is the physiological reaction of organisms to the length of day or night. It occurs in plants and animals.
  • Photoperiodism can also be defined as the developmental responses of plants to the relative lengths of light and dark periods.
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