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
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stroma
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thylakoids
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photosystems
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chlorophyll
B
Correct answer
Explanation
Thylakoids are the saclike, photosynthetic membranes found inside chloroplasts. They are arranged in stacks called grana and contain pigments like chlorophyll that absorb light energy.
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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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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.
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The process by which plants make food with light energy.
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The process by which cells obtain energy.
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The process by which the sun transmits energy.
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The process by which cells grow and divide.
A
Correct answer
Explanation
Photosynthesis is the chemical process used by plants, algae, and some bacteria to synthesize nutrients (food) from carbon dioxide and water using light energy. Obtaining energy from food is called cellular respiration, while cell growth and division refer to the cell cycle.
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mitochondria
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chlorophyll
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cytoplasm
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cell wall
B
Correct answer
Explanation
Chlorophyll is the primary photosynthetic pigment found in the chloroplasts of plants. It absorbs blue and red light while reflecting green light, which gives plants their characteristic green appearance. Mitochondria, cytoplasm, and cell walls are cellular structures, not pigments.
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directs the cell's activities
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stores nutrients, water, or waste
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makes food
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supports the plant cell
C
Correct answer
Explanation
Chloroplasts are the organelles in plant cells where photosynthesis takes place. They capture light energy from the sun to produce glucose, which serves as food for the plant. Other organelles, like the nucleus, direct cell activities, while vacuoles store nutrients and the cell wall provides support.