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Water, pH and Macromolecules

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

Guanidinium ion
Indole
Imidazole
All of these

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

a hydronium ion
highly reactive
its conjugate acid
its conjugate base

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

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

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Water, pH and Macromolecules
Which of the following alcohols would be most soluble in water?

butanol
ethanol
methanol
octanol

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Water, pH and Macromolecules
Which of the following acid/base pairs act as natural buffers in living systems?

H2PO4-/HPO42-
Histidine+/histidine
All of these
H2CO3/HCO3-

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Water, pH and Macromolecules
The reason that fats contain more energy than simple sugars, is fats have many more

covalent bonds
hydrogen bonds
carbon atoms
hydrogen atoms

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