Which of the following is NOT a characteristic of enzymes?

A. They change shape when they bind their substrates.

B. They can catalyze reactions in both forward and reverse directions.

C. Their activity is sensitive to changes in temperature.

D. They are always active on more than one kind of substrate.

Answer Explanation:

Enzymes are substrate-specific. Most enzymes catalyze only one biochemical reaction. Their active sites are specific for a certain type of substrate and do not bind to other substrates and catalyze other reactions.

Therefore, the Correct Answer is D.

Q #1: Which of the following is exchanged between two or more atoms that undergo ionic bonding?

A. Neutrons

B. Transitory electrons

C. Valence electrons

D. Electrical charges

Answer Explanation

An ionic bond forms when one atom donates an electron from its outer shell, called a valence electron, to another atom to form two oppositely charged atoms.
Q #2: What is a hypothetical explanation for an occurrence that is based on prior knowledge called?

A. Independent variable

B. Dependent variable

C. Trial

D. Hypothesis

Answer Explanation

A hypothesis is the use of prior knowledge in order to provide a hypothetical explanation for why something may or may not occur. A hypothesis can be proved wrong or right based on the results of the experiment and repeated trials.
Q #3: Which of these body parts does NOT produce melanin?

A. Hair

B. Nails

C. Skin

D. Iris

Answer Explanation

While melanin can be found in nails, it is not produced there. Melanin is the pigment that provides color to skin, hair, and eyes. Although the specific coloring of one's skin, hair, and eyes are genetically determined. environmental factors such as sun exposure can increase melanin production in the skin to help protect it from damage.

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Which of the following is NOT a characteristic of enzymes?

More Questions on TEAS 7 Science

Q #1: Which of the following is exchanged between two or more atoms that undergo ionic bonding?

Answer Explanation

Q #2: What is a hypothetical explanation for an occurrence that is based on prior knowledge called?

Answer Explanation

Q #3: Which of these body parts does NOT produce melanin?

Answer Explanation

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