ch. 3 proteins: molecules with diverse structures and functions

Question 1

7 functions of proteins:

Answer 1

1. enzyme catalysis
2. defense
3. transport
4. support
5. motion
6. regulation
7. storage

Question 2

proteins are linear polymers made with 20 different ______ ______.

Answer 2

amino acids

Question 3

structure of animo acid

Answer 3

amino and carboxyl groups bonded to a central carbon atoms, with an additional hydrogen and a function side group indicated by R.

Question 4

The covalent bond that links two amino acids is called a ____ ___.

Answer 4

peptide bond

Question 5

polypeptide

Answer 5

-unbranched chain of amino acids linked by peptide bonds.

Question 6

structure of proteins with a hierarchy of 4 levels:

Answer 6

1. primary
2. secondary
3. tertiary
4. quaternary

Question 7

primary structure

Answer 7

-amino acid sequence.

Question 8

secondary structure

Answer 8

hydrogen bonding patterns

Question 9

tertiary structure

Answer 9

folds and links

Question 10

quaternary structure

Answer 10

subunit arrangements

Question 11

similar structures between dissimilar proteins are called ____ or “_______ ________”

Answer 11

motifs, supersecondary structure

Question 12

domains of proteins are _____ and are within the _______ structure of a protein.

Answer 12

functional units within a larger structure, tertiary

Question 13

if a proteins environment is altered, the protein may change its shape or even unfold completely. this process is called

Answer 13

denaturation