2. Cell Chemistry & Cell Components

Mark the following statements as true or false. If a statement is false, correct it to make a true statement.

Proteins are composed of strings of fatty acids linked by glycosidic bonds.

An enzyme is a:

a. biological catalyst that increases the concentration of the products.

b. biological catalyst that increases the concentration of the reactants.

c. chemical that is used in a reaction, after which it can no longer be used by the cell.

d. biological catalyst that works by bringing its substrates closer to their transition states.

Why is it important for a protein to maintain its structure? What is it called when a protein loses its structure?

Differentiate clearly between primary, secondary, and tertiary protein structure.

After you eat a protein bar, which chemical reactions introduced in this chapter must occur for the amino acids in the protein bar to be converted into proteins in your body cells?

A deficiency in this element can be expected to reduce the hemoglobin content of blood:

a. Fe

b. I

c. F

d. Ca

e. K

Pediatricians become concerned about the potential for brain damage when an infant's temperature approaches 105°F. Which class of organic molecules is most likely to be damaged by high temperature? Explain why.

Which of the following is not a function of a protein?

(a) Support

(b) Transport

(c) Metabolic regulation

(d) Storage of genetic information

(e) Movement

List seven major functions performed by proteins.

If a polypeptide contains 10 peptide bonds, how many amino acids does it contain?

(a) 9

(b) 10

(c) 11

(d) 12