Biochemistry

Question: Buffer solutions
[A].

will always have a pH of 7

[B].

are rarely found in living systems

[C].

cause a decrease in pH when acids are added to them.

[D].

tend to maintain a relatively constant pH.

Answer: Option D

Explanation:

No answer description available for this question.

Question: A Bronsted acid becomes __________ upon losing a proton.
[A].

highly reactive

[B].

its conjugate acid

[C].

its conjugate base

[D].

a hydronium ion

Answer: Option C

Explanation:

No answer description available for this question.

Question: Which of the following will easily dissolve in a polar solvent?
[A].

gasoline (heptanes & octanes)

[B].

methane

[C].

argon

[D].

sodium chloride

Answer: Option D

Explanation:

No answer description available for this question.

Question: If protein is made exclusively from nonpolar amino acids, then it will this protein interact with water?
[A].

be repelled by water

[B].

It will be attracted to water

[C].

It will form a membrane in water

[D].

It will act as a buffer and stabilize the pH

Answer: Option A

Explanation:

No answer description available for this question.

Question: A biological polymer contains alanine, tyrosine, and lysine. Which of the following will be true about this molecule?
[A].

DNA

[B].

Strong base

[C].

Phospholipid

[D].

Protein

Answer: Option D

Explanation:

No answer description available for this question.

Question: A compound that is capable of forming hydrogen bonds with water
[A].

is probably held together by noncovalent bonds

[B].

contains at least some polar covalent bonds

[C].

should act as a good buffer for acids and bases

[D].

does not dissolve well in water

Answer: Option B

Explanation:

No answer description available for this question.

Question: Molecules in which the atoms are held together by __________ bonds have the strongest chemical linkages.
[A].

noncovalent

[B].

covalent

[C].

ionic

[D].

hydrogen

Answer: Option B

Explanation:

No answer description available for this question.

Question: A solution with pH = 5 is __________ than a solution with pH = 7.
[A].

2 times more basic

[B].

10 times more basic

[C].

10 times more acidic

[D].

100 times more acidic

Answer: Option D

Explanation:

No answer description available for this question.

Question: Hydrogen bonds and hydrophilic interactions are types of
[A].

weak chemical bonds that hold together the atoms within a molecule

[B].

strong chemical bonds that hold together the atoms within a molecule

[C].

weak chemical bonds that link together separate molecules

[D].

strong chemical bonds that link together separate molecules

Answer: Option C

Explanation:

No answer description available for this question.

Question: Which of the following statements about water is correct?
[A]. It is critical for many of the chemical processes found in living systems
[B]. Polar substances that can form hydrogen bonds will dissolve in it
[C]. Nonpolar substances like oils are not soluble in it
[D]. All of the aboveAnswer: Option D