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Test: Photosynthesis and plant growth - Year 9 MCQ


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10 Questions MCQ Test - Test: Photosynthesis and plant growth

Test: Photosynthesis and plant growth for Year 9 2024 is part of Year 9 preparation. The Test: Photosynthesis and plant growth questions and answers have been prepared according to the Year 9 exam syllabus.The Test: Photosynthesis and plant growth MCQs are made for Year 9 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Photosynthesis and plant growth below.
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Test: Photosynthesis and plant growth - Question 1
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Photosynthesis is a process in...

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Animals cannot photosynthesise and rely on plants to provide their food either directly (herbivores) or indirectly by eating other animals
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If the rate of photosynthesis is reduced, which of the following important processes is also reduced?

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Photosynthesis makes sugars which are then used to make the biomass of the plant itself. More photosynthesis means more sugars which can be used to grow a bigger plant
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Test: Photosynthesis and plant growth - Question 3
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Plants can convert the sugars made during photosynthesis into which insoluble stored form of energy?

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Starch is made from long chains of glucose molecules that have been chemically joined together
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Photosynthesis requires which type of energy?
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The light energy is trapped by chlorophyll molecules which are packed into the chloroplasts
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Farmers will use heated greenhouses for faster growth of crops. This increases photosynthesis by increasing the...
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Photosynthesis is a series of chemical reactions. Chemical reactions usually increase in speed as temperature is increased
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Which very important gas is given off as a by-product of photosynthesis?
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Oxygen makes up about 20% of the air we breathe. Plants and algae are responsible for producing the oxygen we need!
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Where does the water needed for photosynthesis usually come from in plants?
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Root hairs absorb the water needed by the plant for photosynthesis from the soil
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Which pigment is primarily responsible for absorbing light energy during photosynthesis?
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Chlorophyll absorbs light primarily in the blue and red wavelengths, reflecting green light which gives plants their characteristic color.

Test: Photosynthesis and plant growth - Question 9
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During photosynthesis, what is the primary source of electrons that replace those lost from photosystem II?
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Water molecules are split during the light-dependent reactions of photosynthesis, providing electrons, protons, and oxygen.

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In C4 plants, what is the primary function of the mesophyll cells and bundle sheath cells in relation to photosynthesis?
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C4 plants have a specialized pathway where mesophyll cells fix CO2 into a 4-carbon compound, which is then transported to bundle sheath cells where the Calvin cycle occurs.

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