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Water, pH and Macromolecules

Water, pH and Macromolecules
What is the concentration, in moles/liter, of the hydrogen ion, if pH of a solution is 7?

5 x 10-7
1 x 10-7
7 x 10-7
7

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Water, pH and Macromolecules
Which of the following organic groups are found in naturally occuring amino acids?

Imidazole
All of these
Guanidinium ion
Indole

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Water, pH and Macromolecules
A solution with pH = 5 is __________ than a solution with pH = 7.

100 times more acidic
10 times more acidic
10 times more basic
2 times more basic

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Water, pH and Macromolecules
The strength of an acid depends on

number of neutrons gain
electronegativity
number of protons released
number of double bonds

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Water, pH and Macromolecules
A biological polymer contains alanine, tyrosine, and lysine. Which of the following will be true about this molecule?

Strong base
Phospholipid
Protein
DNA

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Water, pH and Macromolecules
Molecules in which the atoms are held together by __________ bonds have the strongest chemical linkages.

hydrogen
noncovalent
covalent
ionic

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