Biology
Photosynthesis in Plants
1,492 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
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carbon dioxide and water
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carbon dioxide and glucose
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glucose and water
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oxygen and glucose
D
Correct answer
Explanation
During photosynthesis, plants use carbon dioxide, water, and light energy to synthesize glucose and release oxygen as a byproduct. Therefore, glucose and oxygen are the products of this process. Carbon dioxide and water are the reactants, not the products.
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carbon dioxide and water
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carbon dioxide and oxygen
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glucose and oxygen
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carbon dioxide and glucose
A
Correct answer
Explanation
Photosynthesis is the process by which plants convert carbon dioxide and water into glucose and oxygen using light energy. This makes carbon dioxide and water the starting materials, or reactants, of the reaction.
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cytoplasm
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NADP+
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stroma
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stomata
C
Correct answer
Explanation
The stroma is the fluid-filled space that surrounds the thylakoid membranes inside a chloroplast. This region contains the enzymes necessary for the light-independent reactions (Calvin cycle) to take place.
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nucleus
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cytoplasm
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chloroplast
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mitochondrion
C
Correct answer
Explanation
Photosynthesis takes place inside the chloroplasts, which are specialized organelles found in plant cells and some algae. Chloroplasts contain the pigments and enzymes necessary to capture light energy and convert it into chemical energy.
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chlorophyll
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carotenoids
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thylakoid
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stroma
A
Correct answer
Explanation
Chlorophyll is the primary photosynthetic pigment in plants. It absorbs light most efficiently in the blue-violet and red regions of the electromagnetic spectrum, while reflecting green light, which gives plants their green appearance.
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NADP+
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pigment
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ATP Synthase
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C4
B
Correct answer
Explanation
Pigments are light-absorbing molecules that capture solar energy. Chlorophyll is the primary pigment used by plants to absorb light and power the reactions of photosynthesis.
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Nucleus
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Cytoplasm
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Vacuole
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Chloroplast
D
Correct answer
Explanation
Chloroplasts are the specialized organelles in plant cells that contain chlorophyll and perform photosynthesis to produce food. Other organelles like the nucleus control cell activities, while the vacuole stores water and nutrients.
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it supports the germination process
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plants consume it
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plants use it to make glucose
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it helps absorb more water
C
Correct answer
Explanation
Chlorophyll absorbs light energy, which is then used in the light-dependent reactions of photosynthesis to drive the synthesis of glucose from carbon dioxide and water. This glucose serves as the primary food source and energy storage molecule for the plant.
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stem
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roots
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cytoplasm
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chlorophyll
D
Correct answer
Explanation
Chlorophyll is the green pigment located within chloroplasts that absorbs light energy from the Sun to power photosynthesis. Other parts like the stem and roots do not contain chlorophyll in high enough concentrations to perform this primary role.
B
Correct answer
Explanation
Plants use light energy (solar radiation) rather than thermal energy to power the chemical reactions of photosynthesis. This light energy is absorbed by chlorophyll to synthesize glucose from carbon dioxide and water.
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Photosynthesis
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Respiration
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DNA replication
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Proteins are formed
C
Correct answer
Explanation
The nucleus contains the cell's genetic material (DNA), making it the site for DNA replication and transcription. Photosynthesis occurs in chloroplasts, cellular respiration occurs primarily in mitochondria, and protein synthesis (translation) occurs on ribosomes in the cytoplasm.
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Respiration
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Photosynthesis
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DNA replication
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Protein synthesis
B
Correct answer
Explanation
Chloroplasts contain chlorophyll, which absorbs sunlight to drive photosynthesis, converting carbon dioxide and water into glucose and oxygen. Respiration is performed by mitochondria, and protein synthesis is performed by ribosomes.
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oxygen and water
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sugar and oxygen
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carbon dioxide and water
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sugar and carbon dioxide
B
Correct answer
Explanation
During photosynthesis, plants use light energy to convert carbon dioxide and water into glucose (sugar) and oxygen. Glucose serves as the plant's food, while oxygen is released into the atmosphere as a byproduct.
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oxygen and water
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sugar and oxygen
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carbon dioxide and water
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sugar and carbon dioxide
C
Correct answer
Explanation
Photosynthesis is the process by which plants make their own food. The raw materials required for this chemical reaction are carbon dioxide, which is absorbed from the air, and water, which is absorbed from the soil, in the presence of sunlight.
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fermentation
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respiration
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photosynthesis
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exocytosis
C
Correct answer
Explanation
Photosynthesis is the biological process where autotrophs, like plants and algae, capture light energy from the sun and convert it into chemical energy in the form of food (glucose). Respiration and fermentation are processes used to break down food for energy, while exocytosis is a transport mechanism.