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BECE (Ghana) Photosynthesis — practice questions

Explore 3 free Photosynthesis questions in BECE (Ghana) Science. Open each question or exercise to read its content, reference answers and available explanation.

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Photosynthesis questions and exercises with answers

Showing questions 1–3 of 3.

In which structures inside plant cells does photosynthesis take place?Read the answer and worked solution →What is the job of chlorophyll in a green leaf?Read the answer and worked solution →Why does a plant change some of its glucose into starch?Read the answer and worked solution →

Worked practice questions

In which structures inside plant cells does photosynthesis take place?

  1. In the chloroplasts
  2. In the mitochondria
  3. In the cell walls
  4. In the vacuoles
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Correct answer: A. In the chloroplasts

1. Green plants trap sunlight in the cells of their leaves and stems. 2. The trapping happens inside small structures called chloroplasts. 3. Chloroplasts hold the green pigment that catches the light. _Source: Siyavula Natural Sciences Grade 8 (CC BY 4.0), Photosynthesis_

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What is the job of chlorophyll in a green leaf?

  1. To store water from the soil
  2. To trap energy from sunlight
  3. To carry sugar to the roots
  4. To make the leaf feel warm
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Correct answer: B. To trap energy from sunlight

1. Chlorophyll is the green pigment inside the chloroplasts of a leaf. 2. Its only job is to trap the energy arriving in sunlight. 3. That trapped energy then drives the reactions that build glucose. 4. Chlorophyll is not used up in the process, so it works over and over. _Source: Siyavula Natural Sciences Grade 8 (CC BY 4.0), Radiant energy to chemical potential energy_

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Why does a plant change some of its glucose into starch?

  1. Starch dissolves quickly in water
  2. Starch traps sunlight in the leaf
  3. Starch does not dissolve in water
  4. Starch turns the leaves dark green
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Correct answer: C. Starch does not dissolve in water

1. Photosynthesis makes glucose all through the daylight hours. 2. Glucose dissolves in water, which is handy for moving it around the plant. 3. The same property is a problem when large amounts have to be stored. 4. Too much dissolved glucose would upset the water balance inside the leaves. 5. So the plant changes surplus glucose into starch, which does not dissolve. 6. Starch can then sit safely in store until the plant needs it again. 7. Starch is not a pigment, so it neither traps light nor colours the leaf. _Source: Siyavula Natural Sciences Grade 8 (CC BY 4.0), Glucose storage and use_

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