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 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 #2: Which section of the digestive system is responsible for receiving chyme and further digesting it?

A. The large intestine

B. The duodenum

C. The jejunum

D. The gallbladder

Answer Explanation

The duodenum is the first section of the small intestine. It receives partially digested food (also called chyme) from the stomach, further digesting it with the help of enzymes released by the gall bladder. Then, the food enters into the jejunum, then the ileum. The large Intestine's main function is the reabsorption of water into the body to form solid waste. It also allows for the absorption of vitamin K produced by microbes living inside the large intestine.
Q #3: Which of the following anatomical structures is directly involved in the production of hormones?

A. Pituitary ,Pancreas

B. Penis,Pons

C. Pancreas ,Penis

D. Prostate, Pancreas

Answer Explanation

The pituitary and the pancreas are both structures of the endocrine system that produce hormones involved in body regulation, growth reaand development, sexual functioning, and other processes. The penis Is a structure of the reproductive system that responds to hormones, but it does not produce them. The prostate plays a role in converting testosterone (produced in the testicles) into dihydrotestosterone, but does not actively produce hormones. The pons is located in the brain stem and relays nerve signals that coordinate messages between the brain and the body. The pericardium is a structural component of the cardiovascular system.

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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 NOT true concerning correlation?

Answer Explanation

Q #2: Which section of the digestive system is responsible for receiving chyme and further digesting it?

Answer Explanation

Q #3: Which of the following anatomical structures is directly involved in the production of hormones?

Answer Explanation

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