Exam 2: Biomolecules

You attend a meeting with undergraduate students who are discussing the structure of proteins. Student one argues that the formation of tertiary structures comes after quaternary processing, while student two maintains that tertiary structures are typically formed before quaternary processing. Which student is correct?

In a series of laboratory experiments, you discover that reducing the pH of an enzymatic reaction reduces the biological activity of the enzyme to zero. When the change in pH is reversed the activity of the enzyme returns to normal. The best explanation for these observations is that at low pH the active site of the enzyme becomes non-functional because of a change in the enzyme's

If a phospholipid is added to water it tends to form a stable bilayer because

Which of the following statements about functional groups is INCORRECT?

DNA is

Which of the following is not an important organic molecule in human cells?

While studying the biochemistry of a species of plant found in alpine bogs, a biologist discovers a previously unknown biomolecule composed entirely of carbon, hydrogen and oxygen. The molecule is a polymer composed of many thousands of a single type of subunit, and has a complex branching structure. This new biomolecule could be

Lipids

The diversity of organic biomolecules is possible because

A hydrolysis reaction is so called because

Globular proteins are compact and spherical in structure, which is reflective of their typical function. Given this, what is a likely function of a globular protein?

All nucleotides have

The specific three-dimensional shape assumed spontaneously by a large, complex protein is determined primarily by

The tertiary structure of a protein refers to the

All nucleic acids

Which functional groups are present on this molecule?

Which of the following molecules is not found in RNA?

Which of the following is not a polymer of smaller units?

Molecules that are composed principally of carbon linked to the elements hydrogen, oxygen, nitrogen, phosphorus and sulphur, are known as

All amino acids have the same general structure: