GED Sample Questions: Science/Biology Questions

The Science portion of the GED will include passages and questions that relate to biology, or the branch of science that studies living things. Check out this example for the types of questions you may see on test day.

The questions in this article refer to the following passage.

Metabolism

The process of metabolism is an essential process in every living cell. Metabolism allows the cell to obtain and distribute energy, which is necessary for survival. Light from the sun is absorbed and converted into chemical energy by photosynthesis, and it is this chemical energy that is necessary for animals to survive.

One of the primary carbohydrates derived from plants is glucose. Through a process called glycolysis, energy is obtained from glucose. This reaction takes place in mitochondria, and the glucose molecule is broken down into pyruvic acids, which are further broken down into molecules, such as ethanol and lactic acid. This process is cyclical as the energy produced keeps the fermentation going.

Pyruvic acids are broken down to carbon dioxide and water by respiration, which releases far more energy. What started out as sunlight has become through photosynthesis the energy that keeps animals alive.

  1. How do animals depend on plants to stay alive?

    • (A)Animals need the shade provided by plants.

    • (B)Cures for some diseases originate in plants.

    • (C)Plants provide a comfortable environment for animals.

    • (D)Plants provide animals with chemical potential energy.

  2. What would happen to a plant if you covered it with a cloth that does not allow light to pass through it?

    • (A)The plant would stop growing.

    • (B)The leaves would shrivel.

    • (C)The flower would fall off.

    • (D)The plant would starve to death.

  3. The chemical that is key to providing animals with energy is ___________.

Answer Key

  1. D. Plants provide animals with chemical potential energy.

    The last paragraph of the passage implies that animals must eat food with chemical potential energy, which is derived from plants. The other answers are irrelevant to the information in the passage.

  2. D. The plant would starve to death.

    Plants produce food using energy from the sun. If you cut off the energy from the sun, you cut off the food supply. The other answers may be symptoms of a plant’s starving to death, but Choice (D) sums up the information in one answer.

  3. pyruvic acid.

    According to the passage, pyruvic acid is key to energy production. This question is a good example of why a little bit of knowledge and familiarity with the words and names used in science are helpful when taking the GED test.

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