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Test: Photosynthesis - NEET MCQ


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5 Questions MCQ Test Biology Class 11 - Test: Photosynthesis

Test: Photosynthesis for NEET 2024 is part of Biology Class 11 preparation. The Test: Photosynthesis questions and answers have been prepared according to the NEET exam syllabus.The Test: Photosynthesis MCQs are made for NEET 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Photosynthesis below.
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Test: Photosynthesis - Question 1

Who described the first action spectrum for photosynthesis?

Detailed Solution for Test: Photosynthesis - Question 1

Engelmann used a prism to split light into its spectral components, and then illuminated a green alga, Cladophora, placed in a suspension of aerobic bacteria.

The bacteria were used to detect the sites of oxygen evolution. He observed that bacteria mainly accumulated in the region of blue and red light of the split spectrum, thus giving the first action spectrum of photosynthesis.

Topic in NCERT: Engelmann's Experiments on Photosynthesis

Line in NCERT: "Using a prism he split light into its spectral components and then illuminated a green alga, Cladophora, placed in a suspension of aerobic bacteria. A first action spectrum of photosynthesis was thus described."

Test: Photosynthesis - Question 2

In the half-leaf experiment of photosynthesis, KOH solution is used because​:

Detailed Solution for Test: Photosynthesis - Question 2

KOH (Potassium Hydroxide) absorbs carbon dioxide. The leaf inside the bottle containing KOH solution does not become blue-black when compared with the leaf which is exposed to atmospheric air. This shows that carbon dioxide is necessary for photosynthesis.

Topic in NCERT: EARLY EXPERIMENTS

Line in NCERT: "Another experiment you may have carried out where a part of a leaf is enclosed in a test tube containing some KOH soaked cotton (which absorbs CO2), while the other half is exposed to air."

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Test: Photosynthesis - Question 3

Who demonstrated the importance of sunlight for the process of photosynthesis?

Detailed Solution for Test: Photosynthesis - Question 3

Jan Ingenhousz is best known for his discovery of photosynthesis, the process by which green plants absorb carbon dioxide in the presence of sunlight and release oxygen

Topic in NCERT: EARLY EXPERIMENTS

Line in NCERT: "Ingenhousz in an elegant experiment with an aquatic plant showed that in bright sunlight, small bubbles were formed around the green parts while in the dark they did not."

Test: Photosynthesis - Question 4

In the overall process of photosynthesis, the total number of CO2, water, sugar and O2 molecules utilised and produced is​:

Detailed Solution for Test: Photosynthesis - Question 4


(Total molecules utilized are 18 and produced are 13. Therefore total is 31) 

Test: Photosynthesis - Question 5

In plant cells, synthesis of ATP by the chemiosmoticmechanism occurs during

Detailed Solution for Test: Photosynthesis - Question 5

The chemiosmotic hypothesis explains how cells produce energy. It describes how, similar to respiration, photosynthesis also uses this method.

Topic in NCERT: Chemiosmotic Hypothesis

Line in NCERT: "Like in respiration, in photosynthesis too, ATP synthesis is linked to development of a proton gradient across a membrane."

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