Bio Quiz 2

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Question 1

The subatomic particles that play the greatest role in cellular chemical reactions are

Your Answer for Question 1

isotopes.

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The correct answer is:
electrons.

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Question 2

The structural unit that retains the properties of an element is the

Your Answer for Question 2

atom.

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Correct!!

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Question 3

Which of the following are found in the nucleus of an atom?

Your Answer for Question 3

A and B

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Correct!!

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Question 4

The component of an atom or molecule that is most important in determining its chemical properties is the

Your Answer for Question 4

electron.

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Correct!!

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Question 5

What is the maximum number of electrons the innermost shell can hold?

Your Answer for Question 5

2

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Correct!!

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Question 6

An atom becomes an ion when

Your Answer for Question 6

it gains or loses electrons.

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Correct!!

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Question 7

The symbol 3CO2 represents

Your Answer for Question 7

three atoms of carbon and one molecule of oxygen.

Comments

The correct answer is:
three molecules of carbon dioxide.

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Question 8

In water, hydrogen bonding occurs between the hydrogen and

Your Answer for Question 8

an oxygen atom in a different molecule.

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Correct!!

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Question 9

Covalent bonds form when one atom _________ its _________ with another atom.

Your Answer for Question 9

shares; electrons

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Question 10

Water is an important solvent of life because

Your Answer for Question 10

it forms hydrogen bonds.

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Question 11

Carbon is such an important molecule for life because

Your Answer for Question 11

it can form chemical bonds with a maximum of four other atoms.

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Question 12

Pure water has a pH of ________ because it is_________.

Your Answer for Question 12

7; neither acidic nor basic

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Question 13

Hydrolysis could be correctly described as

Your Answer for Question 13

breaking of a long-chain compound into its subunits by adding water to the structure between its subunits.

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Question 14

Carbohydrate monomers are united into a polymer by means of

Your Answer for Question 14

dehydration synthesis.

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Question 15

Polysaccharides are made up of

Your Answer for Question 15

sugars.

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Correct!!

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