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NEET • BIOLOGY • PHOTOSYNTHESIS IN HIGHER PLANTS

Photosynthesis in higher plants practice · Easy

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Showing 1-30 of 55 questions
1 Easy
1 of 55
Understanding +4 | -1
Correct sequence of rate of photosynthesis in different light is
View answer and explanation
Correct option: A
Red > Blue > Green
Option A is correct because red light is more effectively absorbed by chlorophyll than blue light, and green light is poorly absorbed.
2 Easy
2 of 55
Remembering +4 | -1
Law of limiting factors was given by
View answer and explanation
Correct option: B
Blackman
Option B (Blackman) is correct because Blackman is known for giving the Law of Limiting Factors.
3 Easy
3 of 55
Understanding +4 | -1
A student sets up an experiment on photosynthesis as follow : He takes soda water in a glass tumbler and add a chlorophyll extracts into the contents and keeps the tumbler exposed sunlight hoping that he has provided necessary ingredient for photosynthesis to proceed (viz, CO2C{O_2} , H2O{H_2}O , chlorophyll and light).
What do you think what will happen after, say few hours of exposure of light?
View answer and explanation
Correct option: D
Photosynthesis will not take place because intact chloroplasts are needed for the process
Option D is correct because photosynthesis requires intact chloroplasts to function properly, which are not present in the student's setup.
4 Easy
4 of 55
Understanding +4 | -1
Rubisco enzyme is absent in
View answer and explanation
Correct option: A
Mesophyll cell
Option A (Mesophyll cell) is correct because in C4 plants, RuBisCO is primarily located in the bundle sheath cells, not the mesophyll cells.
5 Easy
5 of 55
Understanding +4 | -1
What is the advantage of light reactions producing ATP and NADPH2NADP{H_2} on stromal side of thylakoid membrane?
View answer and explanation
Correct option: A
Calvin cycle consumes ATP and NADPH2NADP{H_2} from stroma
Option A is correct because the ATP and NADPH produced during the light reactions are utilized in the Calvin cycle, which occurs in the stroma.
6 Easy
6 of 55
Remembering +4 | -1
In PS I, the reaction centre Chl a has absorption peak at ____whereas in PS II, the reaction centre Chl a has absorption maxima at ______
View answer and explanation
Correct option: A
700 nm, 680nm
Option A (700 nm, 680nm) is correct because the reaction center chlorophyll a in PSI (P700) has an absorption peak at 700 nm, while the reaction center chlorophyll a in PSII (P680) has an absorption peak at 680 nm.
7 Easy
7 of 55
Understanding +4 | -1
Photosynthesis convert radient or solar energy into the
View answer and explanation
Correct option: C
Chemical energy
Option C is correct because photosynthesis converts light energy into the chemical energy stored in glucose and other carbohydrates.
8 Easy
8 of 55
Remembering +4 | -1
The mechanism of ATP formation both in chloroplast and mitochondria is explained by
View answer and explanation
Correct option: C
Chemiosmotic theory
Option C (Chemiosmotic theory) is correct because the chemiosmotic theory explains ATP formation in both chloroplasts and mitochondria by proton gradients.
9 Easy
9 of 55
Understanding +4 | -1
Factors affecting photosynthesis are
I. number and size of leaves
II. age and orientation of leaves
III. amount of chlorophyll
IV. amount of O2{O_2} and CO2C{O_2}
Select the correct option
View answer and explanation
Correct option: D
I, II, III and IV
Option D (I, II, III and IV) is correct because all the listed factors (number and size of leaves, age and orientation of leaves, amount of chlorophyll, and amount of O2 and CO2) affect the rate of photosynthesis.
10 Easy
10 of 55
Understanding +4 | -1
Which would do maximum harm to a tree?
View answer and explanation
Correct option: C
Loss of all its leaves
Option C (Loss of all its leaves) is correct because leaves are the primary sites of photosynthesis, and losing all of them would severely impair the tree's ability to produce food, potentially leading to its death.
11 Easy
11 of 55
Remembering +4 | -1
The enzymatic reactions incorporate CO2C{O_2} into the plants leading to the synthesis of sugar in
View answer and explanation
Correct option: A
Stroma
Option A (Stroma) is correct because the Calvin cycle, which incorporates CO2 into sugars, occurs in the stroma of the chloroplast.
12 Easy
12 of 55
Remembering +4 | -1
Which hypothesis best explains the synthesis of ATP in chloroplast?
View answer and explanation
Correct option: B
Chemiosmotic hypothesis
Option B (Chemiosmotic hypothesis) is correct because the chemiosmotic hypothesis explains ATP synthesis in chloroplasts by proton gradient.
13 Easy
13 of 55
Remembering +4 | -1
The law of limiting factors was proposed with particular reference to photosynthesis. Identify the scientist, who proposed this law?
View answer and explanation
Correct option: D
Blackman
The correct answer is D (Blackman) because Blackman is the scientist who proposed the law of limiting factors.
14 Easy
14 of 55
Understanding +4 | -1
Under normal condition, which one of the following is a major limiting factor?
View answer and explanation
Correct option: B
CO2C{O_2}
Option B (CO2C{O_2}) is correct because, under normal conditions, the concentration of carbon dioxide in the atmosphere is often a limiting factor for photosynthesis, especially in C3 plants.
15 Easy
15 of 55
Understanding +4 | -1
Conditions helpful in photorespiration are
View answer and explanation
Correct option: A
More oxygen and less carbon dioxide
Option A (More oxygen and less carbon dioxide) is correct because high oxygen and low carbon dioxide concentrations favor photorespiration.

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16 Easy
16 of 55
Understanding +4 | -1
Plants which show double carboxylation in two different types of cells in leaves
View answer and explanation
Correct option: C
Also show Kranz anatomy
Option C (Also show Kranz anatomy) is correct because double carboxylation in different cells is a characteristic of C4 plants, which also exhibit Kranz anatomy.
17 Easy
17 of 55
Understanding +4 | -1
Which one is essential for the respiration as well as photosynthesis?
View answer and explanation
Correct option: D
Cytochrome
Option D (Cytochrome) is correct because cytochromes are essential components of both the electron transport chain in respiration and the photosynthetic electron transport chain.
18 Easy
18 of 55
Understanding +4 | -1
The internal factors that affects photosynthesis of plant depends on the
View answer and explanation
Correct option: B
Genetic predisposition
Option B (Genetic predisposition) is correct because internal factors affecting photosynthesis are primarily determined by the plant's genetic makeup, influencing enzyme activity, chlorophyll content, and other physiological traits.
19 Easy
19 of 55
Understanding +4 | -1
Light energy in photosynthesis is utilized in
View answer and explanation
Correct option: B
ADP converted into ATP
Option B (ADP converted into ATP) is correct because light energy in photosynthesis is utilized to convert ADP into ATP during photophosphorylation.
20 Easy
20 of 55
Remembering +4 | -1
By which plant pigment maximum absorption of radiation takes place in the blue and red regions of absorption spectrum?
View answer and explanation
Correct option: A
Chlorophyll-a
Option A (Chlorophyll-a) is correct because Chlorophyll-a exhibits maximum absorption of radiation in the blue and red regions of the absorption spectrum.
21 Easy
21 of 55
Understanding +4 | -1
Choose the correctly matched pair:
View answer and explanation
Correct option: C
Tadpole like structure - Chlorophyll
Option C (Tadpole like structure - Chlorophyll) is the correctly matched pair, as chlorophyll molecules do resemble a tadpole-like structure.
22 Easy
22 of 55
Understanding +4 | -1
Which factor is not limiting in normal condition for photosynthesis?
View answer and explanation
Correct option: A
Air
Option A (Air) is correct because air itself is not a limiting factor for photosynthesis under normal conditions; the components of air, such as carbon dioxide, water, and light, can be limiting, but not the air itself.
23 Easy
23 of 55
Remembering +4 | -1
First reaction in photosynthesis is
View answer and explanation
Correct option: B
Excitation of chlorophyll molecule
Option B (Excitation of chlorophyll molecule) is correct because the initial step in photosynthesis involves the absorption of light energy by chlorophyll, leading to its excitation.
24 Easy
24 of 55
Understanding +4 | -1
Assertion: Sugarcane shows Kranz anatomy.
Reason: In diocot leaves, the bundle sheath cells lack
chloroplasts
View answer and explanation
Correct option: C
If the assertion is true but the reason is false
Option C (If the assertion is true but the reason is false) is correct because sugarcane does show Kranz anatomy, but dicot leaves do have chloroplasts in their bundle sheath cells.
25 Easy
25 of 55
Understanding +4 | -1
Choose the correct statement.
View answer and explanation
Correct option: C
Carboxylation of phosphoenol pyruvate results in the formation of C4−{C_4} - plants
Option C (Carboxylation of phosphoenol pyruvate results in the formation of C4−{C_4} - plants) is correct because the initial carbon fixation in C4 plants involves the carboxylation of phosphoenolpyruvate (PEP).
26 Easy
26 of 55
Remembering +4 | -1
The chlorophyll molecule in reaction centre of PS II has maximum absorption at
View answer and explanation
Correct option: A
680 nm
Option A (680 nm) is correct because the chlorophyll molecule at the reaction center of PSII, known as P680, absorbs light most strongly at 680 nm.
27 Easy
27 of 55
Remembering +4 | -1
Which of the following is concerned with carbon dioxide fixation?
View answer and explanation
Correct option: B
Calvin cycle
Option B (Calvin cycle) is correct because the Calvin cycle is the process by which carbon dioxide is fixed into organic molecules in photosynthesis.
28 Easy
28 of 55
Application +4 | -1
The amount of CO2\mathrm{CO}_2 and H2O\mathrm{H}_2 \mathrm{O} absorbed to produce 180 g180 \mathrm{~g} of glucose are
View answer and explanation
Correct option: C
264 and 108 grams respectively
The correct answer is C (264 and 108 grams respectively) because it accurately reflects the stoichiometry of glucose production in photosynthesis.
29 Easy
29 of 55
Understanding +4 | -1
How many molecules of glycine is required to release one CO2C{O_2} molecule in photorespiration?
View answer and explanation
Correct option: B
Two
Option B (Two) is correct because two molecules of glycine are required to release one molecule of CO2CO_2 in photorespiration.
30 Easy
30 of 55
Understanding +4 | -1
Which of the following statements with regard to photosynthesis is/are correct?
I. In C4−{C_4} -plants, the primary CO2C{O_2} acceptor is PEP.
II. In the photosynthetic process, PS-II absorbs energy at or just below 680 nm.
III. The pigment that is present in the Pigment System-I isP683{P_{683}}.
View answer and explanation
Correct option: D
I and II only
Option D (I and II only) is correct because in C4 plants, the primary CO2 acceptor is indeed PEP, and PS-II absorbs energy at or just below 680 nm.
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