Chapter 4-Protein

Question 1

Polypeptides consist of______ linked by a _____

Answer 1

-Amino Acids, Peptide bond

Question 2

The peptide bond is also called an _________

Answer 2

-Amide bond

Question 3

Each amino acid in a protein is called _______

Answer 3

-Residue

Question 4

Which end of the polypeptide chain is taken as the beginning of the chain

Answer 4

-The Amino terminal end

Question 5

Which end of the polypeptide chain is taken as the end of the chain

Answer 5

-The carboxyl terminal end

Question 6

Disulfide bonds form by the oxidation of two _______

Answer 6

-Cystines

Question 7

Secondary Structure is the ___________structure formed by __________between ________and ___ groups of amino acids

Answer 7

-3D,Hydrogen bonds peptide NH,CO

Question 8

Each turn of the Alpha Helix is made of ___amino acids

Answer 8

-3.6

Question 9

What is the Alpha Helix stabilized by ?

Answer 9

-Intrachain of Hydrogen Bonds

Question 10

What is the Beta Sheets stabilized by ?

Answer 10

-Hydrogen bonding between polypeptide strands

Question 11

Beta Sheets are formed by ________ beta strands

Answer 11

-Adjacent

Question 12

What type of bonds link the strands in Beta sheets?

Answer 12

-Hydrogen Bonds

Question 13

The strands of a Beta sheet may be, ______,________,or______

Answer 13

parallel ,antiparallel ,mixed

Question 14

Fibrous Proteins provide _________ for cells and tissues

Answer 14

-Structural Support

Question 15

what type of protein is a collagen?

Answer 15

Structural Protein

Question 16

What are the helices in the collagen supported by?

Answer 16

Steric repulsion of the pyrrolidine rings of proline

Question 17

How do they three intertwined chains in collagen interact with each other

Answer 17

Hydrogen Bonds

Question 18

Tertiary Structure refers to the _____arrangement of _________ that are ________in the primary structure and to the pattern of ________bond formation

Answer 18

Spatial ,Amino Acids, far apart, disulfide

Question 19

Tertiary structure is a result of?

Answer 19

Interactions between R groups of the peptide chain

Question 20

The interior of globular proteins consists mainly of ________

Answer 20

Hydrophobic Amino Acids

Question 21

The exterior of globular proteins consists of _________and________

Answer 21

Charged , Polar Amino Acids

Question 22

What are Quaternary Structures?

Answer 22

Many polypeptide chains that come together