Biology
Photosynthesis in Plants
1,508 Questions
Photosynthesis is the biological process by which plants convert light energy into chemical energy. This page contains practice questions covering essential topics like chlorophyll, light reactions, and the pathways specific to plants. This material is crucial for medical entrance exams and academic assessments.
Chlorophyll and pigmentsLight reactionsCalvin cycleCAM plantsElectron transportPhotosynthesis factors
Photosynthesis in Plants Questions
Photosynthesis requires several raw materials. Match the location with the raw material:
|
|
| a. Plant |
1. Carbon dioxide |
| b. Soil |
2. Sunlight |
| c. Air |
3. Chlorophyll |
| d. Day |
4. Nitrogen |
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a - 1, b - 2, c - 3, d - 4
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a - 2, b - 4, c - 3, d - 1
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a - 3, b - 4, c - 1, d - 2
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a - 4, b - 2, c - 3, d - 1
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a - 1, b - 2, c - 4, d - 3
C
Correct answer
Explanation
This is correct. Plants have chlorophyll. Soil contains the nitrogen that helps during photosynthesis. Air has carbon dioxide. Sunlight required by the plants during photosynthesis is availaible during day.
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Chromoplast
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Elaioplast
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Amyloplast
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Aleuroplast
A
Correct answer
Explanation
Chromoplasts are coloured plastids. Their colour is green, orange, yellow, etc. due to the presence of carotenoids.
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These are plastids which are red, yellow or orange in colour.
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These are colourless plastids
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These are green coloured plastids.
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None of these
A
Correct answer
Explanation
Yes, it is correct. This is a type of plastid which have yellow, orange or red colour. It is found in petals of flower, fruits, etc. This colour is due to two pigments, carotene and xanthophyll.
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It is disc shaped.
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Chloroplast is the site for photosynthesis.
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It has watery fluid rich in protein known as stroma.
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It occurs in those parts of plants which are not exposed to light.
D
Correct answer
Explanation
This is the correct answer as it does not describe the chloroplast. Instead it is the leucoplast present in those parts which are not exposed to sunlight.
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Nitrogen
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Carbon dioxide
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Oxygen
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Hydrogen
C
Correct answer
Explanation
Oxygen is the gas used in respiration by most organisms and released during photosynthesis by plants. This is a fundamental biological process - animals breathe in oxygen and exhale carbon dioxide, while plants do the opposite during photosynthesis. Nitrogen makes up most of the atmosphere but is not used in respiration.
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Combustion
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Respiration
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Formation of oxides
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Photosynthesis
D
Correct answer
Explanation
Photosynthesis does not use oxygen - in fact, it produces oxygen as a byproduct while consuming carbon dioxide. Combustion, respiration, and oxide formation all require oxygen to occur. Photosynthesis is the only process listed that is oxygen-independent and actually generates oxygen.
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Nitrogen
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Carbon dioxide
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Oxygen
-
Hydrogen
B
Correct answer
Explanation
Carbon dioxide (CO2) is used by plants during photosynthesis to make glucose, and it is released as a byproduct of cellular respiration in living organisms. This creates a balanced cycle between plants and animals. Nitrogen, oxygen, and hydrogen are not exchanged in this specific way between these two processes.
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Transpiration
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Fossilization
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Decomposition
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Photosynthesis
D
Correct answer
Explanation
Photosynthesis converts atmospheric carbon dioxide (CO2) into glucose (C6H12O6) using sunlight energy, water, and chlorophyll. Transpiration is water loss, fossilization preserves organic matter, and decomposition breaks down organic material. Only photosynthesis builds glucose molecules from atmospheric carbon.
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Cristae
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Cisternae
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Grana
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Stroma
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Centrioles
C
Correct answer
Explanation
Grana is a part of chloroplast, which contains molecules of the green pigment, chlorophyll and other pigments to trap the solar energy.
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New chloroplasts are made.
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Chloroplasts are disintegrated and converted into chromoplasts.
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Chromoplasts are changed into chloroplasts.
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Leucoplasts are converted into chromoplasts.
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Chloroplasts are converted into leucoplasts.
B
Correct answer
Explanation
Yes, it is true. Chloroplasts are disintegrated and converted into chromoplasts.
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Carotene
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Chlorophyll
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Xanthophyll
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Anthocyanin
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Leucoplast
D
Correct answer
Explanation
Anthocyanins are pigments which are associated with plastids, instead they remain dissolved in the cell- sap and give that color to the plant structure.
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2000-3000 lux
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3000-5000 lux
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5000-7000 lux
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Dark
B
Correct answer
Explanation
Tissue culturing requires 3000-5000 lux of light when the plants become capable of photosynthesis.
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Transpiration
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Translocation
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Secretion of resins and gums
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Through leaves
B
Correct answer
Explanation
Plants get rid off excess water by the process called transpiration. Transpiration is the loss of water in the vapour form from the exposed surfaces of plants like leaves, stem, etc. Waste products may be stored in leaves that fall off. Also, there are other waste products, which are stored as resins and gums in old xylem (water conducting system). Translocation is the means to transport food from leaves to other parts of the plant or transport of water from the roots to other parts of the plant.
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Water
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Oxygen
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Carbon dioxide
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Nitrogen
B
Correct answer
Explanation
Oxygen is generated as a waste during photosynthesis in plants.
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Granum
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Thylakoid
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Lamella
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Stroma
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Ribosome
D
Correct answer
Explanation
This is the correct option. Stroma is the site of 'dark reaction' during photosynthesis, that involves chloroplasts.
Ribosome is a minute particle consisting of RNA and associated proteins found in large numbers in the cytoplasm of living cells. They bind messenger RNA and transfer RNA to synthesise polypeptides and proteins.