Missed Questions - Ch. 2 Flashcards

1
Q

Which of the following inorganic substances is a metabolic waste product?

A)	oxygen

B)	carbon dioxide

C)	inorganic salts

D)	all of the above
A

B) carbon dioxide

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2
Q

What is the pH of a solution whose H+ concentration is 0.0001?

A)	4

B)	-3

C)	3

D)	2
A

A) 4

Explanation - however many numbers come after the decimal point of the concentration will be the equivalent pH

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3
Q

The element sulfur is sometimes found in which one of the following molecules.

A)	carbohydrate

B)	lipid

C)	protein

D)	nucleic acid
A

C) protein

Explanation - Proteins contain C, H, O, N, and sometimes sulfur

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4
Q

The atomic weight of an atom is determined by the sum of its protons and neutrons.

A)	True

B)	False
A

A) True

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5
Q

A molecular formula depicts how atoms are joined and arranged in molecules.

A)	True

B)	False
A

B) False

Explanation - A molecular formula will only show the relative numbers of atoms, not the structures

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6
Q

Electrolytes that release hydrogen ions in water are called bases.

A)	True

B)	False
A

B) False

Explanation - acids release hydrogen atoms or H+

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7
Q

Hydrogen bonds are found in

A)	protein molecules

B)	gaseous oxygen

C)	carbohydrate molecules

D)	inorganic molecules exclusively
A

A) protein molecules

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8
Q

A fat that has all of its carbon atoms joined by single carbon to carbon bonds is said to be

A)	saturated

B)	unsaturated

C)	polyunsaturated

D)	complete
A

A) saturated

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9
Q

The protons carry a positive electrical charge and electrons carry a negative electrical charge.

A)	True

B)	False
A

A) True

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10
Q

A molecular formula depicts how atoms are joined and arranged in molecules.

A)	True

B)	False
A

B) False

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