Enzymes catalyze biochemical reactions by ________

A. Lowering the potential energy of the products

B. Separating inhibitors from products

C. Forming a complex with the products

D. Lowering the activation energy of the reaction

Answer Explanation:

Enzymes act as catalysts for biochemical reactions. A catalyst is not consumed in a reaction, but rather lowers the activation energy for that reaction. The potential energy of the substrate and the product remain the same, but the activation energy-the energy needed to make the reaction progress can be lowered with the help of an enzyme.

Therefore, the Correct Answer is D.

Q #1: Which of the following is a carbohydrate?

A. Cellulose

B. Hemoglobin

C. Estrogen

D. ATP

Answer Explanation

Cellulose is a complex carbohydrate that composes the better part of the cell wall.

Hemoglobin is a protein and is found in red blood cells. Adenosine triphosphate (ATP) is a compound used by living organisms to store and use energy. Estrogen is a steroid hormone that stimulates the development of female sex characteristics.
Q #2: Which of the following is NOT true concerning correlation?

A. Correlation can show the relationship between variables.

B. Correlation can show cause and effect.

C. Correlation can show linear relationships.

D. Correlation can show nonlinear relationships.

Answer Explanation

Correlations may be positive or negative and linear or nonlinear. However, correlation does not determine cause and effect. Correlation does not necessarily mean causation.
Q #3: Your class is competing with another class to determine who has the best plant color. Your class decides to test a couple of solutions to determine which would be best for overall plant color before competing. Starting with four sets of four plants, the class decides to water each set with a different solution. They water them once a week with 200ml of the following solutions: water, diet soda, 1% bleach solution, and a 1% salt solution. All plants are placed in the window that receives the recommended amount of light. After a month of testing, your class notices that only two plants are alive, but one of those two does not look healthy. Based on these results, which of the following would be a good hypothesis to design the next experiment around?

A. Plants need more than 200 mL of liquid per week.

B. Salt has no impact on plant health.

C. Salt contains useful nutrients for plants.

D. A combination of the solutions tested will produce healthier plants.

Answer Explanation

Since only 2 out of the initial 16 plants survived the whole month, it would be reasonable to test variables that were shared by all the plants. As such, the amount of liquid the plants need would be a good follow-up experiment. It is not specified as to which plants survived, so there is not enough information to think that testing the impact of salt is warranted. Additionally, since almost all the plants died, it is not reasonable to assume that a combination of the solutions would have an impact.

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Enzymes catalyze biochemical reactions by ________

More Questions on TEAS 7 Science

Q #1: Which of the following is a carbohydrate?

Answer Explanation

Q #2: Which of the following is NOT true concerning correlation?

Answer Explanation

Answer Explanation

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