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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?

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

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Water, pH and Macromolecules
If protein is made exclusively from nonpolar amino acids, then it will this protein interact with water?

It will act as a buffer and stabilize the pH
be repelled by water
It will be attracted to water
It will form a membrane in water

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Water, pH and Macromolecules
The pH of a solution is determined by

relative concentration of acids and bases
dielectric constant of the medium
concentration of salt
environmental effect

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Water, pH and Macromolecules
The elements oxygen, nitrogen, and carbon

can all form covalent bonds with other elements
contain protons and neutrons in their atomic nuclei
All of these
are common elements in the molecules that make up living organisms

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Water, pH and Macromolecules
A Bronsted acid becomes __________ upon losing a proton.

its conjugate acid
its conjugate base
a hydronium ion
highly reactive

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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?

Phospholipid
Strong base
DNA
Protein

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