Which of the following classes of biological molecules includes enzymes?

Lipids

Vitamins

Carbohydrates

Proteins

Answer and Explanation

The Correct Answer is D

Enzymes are a type of protein that catalyze chemical reactions in the body. Proteins are one of the four main classes of biological molecules, along with lipids, carbohydrates, and nucleic acids. The other options are not classes of biological molecules that include enzymes. Lipids are a class of molecules that includes fats and oils, vitamins are organic compounds that are essential for normal growth and nutrition, and carbohydrates are a class of molecules that includes sugars and starches.

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Correct Answer is B

Explanation

Given the new findings that worm infestation can relieve the eﬀects of certain autoimmune disorders, the hypothesis should be modified to state that worm infestation reduces the severity of certain autoimmune disorders. This option best reﬂects the new information and suggests a potential benefit of worm infestation in relation to autoimmune disorders. The other options do not accurately reﬂect the new findings and do not provide a clear modification to the hypothesis.

A. It gained an electron. B. It lost an electron. C. It lost a proton. D. It gained a proton.

Correct Answer is A

Explanation

A chloride ion has a negative charge because it gained an electron. When an atom gains an electron, it becomes negatively charged because it now has more electrons than protons. In the case of a chloride ion, the neutral chlorine atom gains an electron to become a negatively charged chloride ion.

The other options are not correct because they do not result in a negative charge. Losing an electron would result in a positive charge. Losing or gaining a proton would change the identity of the atom and is not related to the formation of a chloride ion.

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\| 1	\| 5.0 g\| 2.0 sec	\|
\| 2	\| 5.0 g\| 1.0 sec	\|
\| 3	\| 30.0 g\| 0.5 sec	\|
\| 4	\| 35.0 g\| 1.5 sec	\|

Which of the following classes of biological molecules includes enzymes?

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Naxlex Comprehensive Predictor Exams

Parasitic worm infestation is hypothesized to be damaging to the host. However, scientists have recently discovered that worm infestation can relieve the eﬀects of certain autoimmune disorders. In which of the following ways should the hypothesis be modified, given the new findings?

Correct Answer is B

Explanation

For which of the following reasons does a chloride ion have a negative charge?

Correct Answer is A

Explanation

Genetic information describing the characteristics of an organism is found in which of the following?

Use the table below to answer the question. | Object | Mass | Time of Fall | | | | | | 1 | 5.0 g| 2.0 sec | | 2 | 5.0 g| 1.0 sec | | 3 | 30.0 g| 0.5 sec | | 4 | 35.0 g| 1.5 sec | Which of the following conclusions is supported by the data?

A patient goes to the doctor with a cold and sore throat and asks for antibiotics. The doctor refuses to prescribe antibiotics to the patient because the illness is caused by which of the following pathogens?

If a portion of a strand of DNA bases reads 5' AGCTAGCGT 3', what would the sequence of bases on the complementary strand read?

Which of the following is the process in which an ovarian follicle matures and releases a reproductive egg?

Which of the following substances is responsible for donating H+ ions to act as a buﬀer when blood pH rises?

Which of the following functions does the myelin sheath perform for a nerve cell?

Which of the following organs filters excess solutes from the blood?