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Exam 2: Atoms, Ions, and Molecules

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Question 71

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Which of the following statements accurately describes the solutes within a solution?

A) Water is the universal solute, and solutes are more abundant in solutions than solvents are.
B) The solutes are not visible, do not scatter light, and do not settle if the solution is left standing.
C) Solutes are greater than 1 millimeter in size, and will settle out of solution if the mixture is left standing.
D) Solutes are between 1 nanometer and 1 millimeter in size; they do not scatter light but will settle out of solution if left standing.

E) None of the above
F) B) and C)

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Question 72

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Steroid hormones are nonpolar molecules that travel in the blood. Explain how such molecules interact with the water of the plasma.

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Because they are nonpolar, steroids are ...

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Question 73

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Imagine you are trying to create a living, artificial cell in a lab. Considering their role in human cells, explain how you would try to use each of the four types of biological molecules in your artificial cell. For example, explain how you would use one type of molecule to establish a boundary between the water in your test tube and the inside of your artificial cell.

Any molecule that contains a polar bond within it is a polar molecule.

To neutralize a base, a(n) ________ must be added.

In general, the number of electrons that would fill an atom's outer shell and make it nonreactive is ________.

When the pH of an acidic solution is brought to 7.0, that change is called ________.

In a sample of distilled water, a water molecule that has picked up an extra hydrogen ion is called a(n)

Glycogen is a polymer of ________ molecules.

The two fatty acids within a phospholipid molecule make up its

FAD and NAD⁺ are examples of nucleotides.

All inorganic molecules contain carbon.

When solution concentration is measured in moles of solute per kilogram of solvent, that measurement is known as ________.

The three forms of matter are

An emulsion is classified as a specific type of

The number of neutrons in an atom can be determined by

Radioisotopes contain

Elements in the first column of the periodic table contain one electron in their outer shell.

A beta sheet is an example of a secondary structure of a protein.

Like glucose, ribose and deoxyribose are monosaccharides, but they are composed of five carbons rather than six.