Most of the important functional groups in biological molecules contain oxygen a

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Question
Most of the important functional groups in biological molecules contain
Options
A. oxygen and/or nitrogen and are acidic
B. oxygen and a phosphate
C. nitrogen and a phosphate
D. oxygen and/or nitrogen and are polar

Correct Answer

oxygen and/or nitrogen and are polar

Water, pH and Macromolecules problems

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1. A compound that is capable of forming hydrogen bonds with water
Options
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

2. The main difference between an acid and a base is that
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A. bases are polar molecules and acids are not
B. acids are polar molecules and bases are not
C. bases donate hydrogen ions in water while acids accept hydrogen ions
D. acids donate hydrogen ions in water while bases accept hydrogen ions

3. The elements oxygen, nitrogen, and carbon
Options
A. can all form covalent bonds with other elements
B. contain protons and neutrons in their atomic nuclei
C. are common elements in the molecules that make up living organisms
D. All of the above

6. Which amino acids would most likely reside in the membrane-anchoring domain of a membrane embedded protein?
Options
A. Isoleucine, valine and phenylalanine
B. Phenylalanine, valine, and aspartate
C. Leucine, threonine, and lysine
D. Lysine, arginine and histidine

7. An essential amino acid is one that
Options
A. is essentially easy to synthesize
B. is essential to flagella motion
C. the body cannot synthesize
D. the body can synthesize under essential conditions

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