2.7.4 Tertiary Structure Flashcards


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1

The __________ structure refers to the way a protein folds upon itself.

tertiary

2

Two proteins composed of exactly the same numbers and types of amino acids, but very different sequences, may differ in

all of the above

Explanation:
The sequence of the amino acids in a protein determines the tertiary structure. The secondary structure of the protein is determined the sequence. Biologic activity of proteins is determined by the R groups available for reactions and the shape of the protein. A change in the shape of a protein can either restrict protein activity or change protein activity.

3

Disulfide bridges form between

two cysteines.

4

Which of the following types of covalent bonds contributes to the tertiary structure of a protein?

disulfide bonds

5

Which of the following amino acids would most likely be found in the interior of a globular protein that exists in the cytosol of a cell?

isoleucine

6

What part do Van der Waals forces play in the tertiary structure of a protein?

they are involved in attraction between nonpolar R groups in the protein interior

7

• Several major interactions take place between R groups:

: hydrophobic interactions, Van der Waals interactions,
ionic bonding, and formation of disulfide bridges.

8

Four main types of interactions give a polypeptide its

tertiary structure

9

Hydrogen Bonds may also participate in stabilizing

the tertiary structure

10

_______ are strong covalent bonds that
form between two cysteine molecules.

Disulfide bridges