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Biology Past Questions and Answers

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Waec Biology Questions

Question 951:

In active transport, molecules move against a concentration gradient, therefore

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A Molecules move from a region of low concentration to a region of high concentration
B Molecules move from a region of high concentration to a region of low concentration
C The concentration gradient has little effect on the movement of molecules
D Molecules force their way through special channels

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Question 952:

Which of the following substance pass through the root cell membrane by osmosis?

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A Cell sap
B Carbon dioxide
C Oxygen
D Water

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Question 953:

Which of the following statements defines plasmolysis?

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A Shrinking of a plant cell in a solution
B Shrinking away of cytoplasm from an animal cell membrane
C Shrinking away of the cytoplasm from the plant cell wall
D Shrinking of the vacuole and leaving the cytoplasm attached to the cell wall

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Question 954:

Raw materials required by green plants to manufacture their food are

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A Mainly fluids
B Inorganic substances
C Living materials
D Mainly gases

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Question 955:

The role of ATP include all the following activities excerpt

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A Provision of energy to do work in living organisms
B Transmission of nerve impulse
C Keeping the body warm in homoithermic animals
D Producing water during aerobic respiration

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