Proteins

Question 1

What are proteins commonly made of?

Answer 1

20 amino acids

Question 2

What are amino acids made of?

Answer 2

Hydrogen
Carboxly grip
An amino group
A unique side of chain or R-group

Question 3

What does it vary in

Answer 3

Structure

Question 4

Protein conformation

Answer 4

3 dimensional

Question 5

Native conformation

Answer 5

Under normal conditions

Question 6

A celluar response to chemical stimuli-function

Answer 6

*(receptor proteins)

Question 7

Structural support-function

Answer 7

Actin, anchoring fibrils, collagen

Question 8

Storage-function

Answer 8

Amino acids

Question 9

Transport-function

Answer 9

Hemoglobin

Question 10

Signaling-function

Answer 10

Chemical messengers

Question 11

Celluar response to chemical stimuli-function

Answer 11

Receptor proteins

Question 12

Movement-function

Answer 12

Contractile proteins

Question 13

Defense-funtion

Answer 13

Antibodies

Question 14

Catalyst of most biochemical reactions- functions

Answer 14

Enzymes

Question 15

Functions

Answer 15

1.structural support
2.storage
3.transport
4.signaling
5.celluar response to chemical stimuli
6.movement
7.defense
8.catalyst of most biochemical reactions

Question 16

Primary structure

Answer 16

*Determined by genes (the order of DNA)
*A slight change in the DNA can effect function
*Amino acid monomers are joined by peptide bonds

Question 17

2 major types of secondary structure

Answer 17

Alpha helix , beta pleated sheets

Question 18

Alpha helix

Answer 18

*3.6 amino acids per turn

Question 19

Who discovered alpha helix

Answer 19

Linus Pauling and Robert Corey in 1951

Question 20

What is alpha helix found in

Answer 20

Fibrous protein ( keratin and collagen

Question 21

Beta pleated sheets

Answer 21

*each sheet is made of anti-parallel changing folded into accordion pleats
*make up the dense core of many globular proteins (Fibroin,lysozyme)

Question 22

Tertiary

Answer 22

*bonding between side chains R groups of the primary structure
*composed of all types of bonds (polar,non polar

Question 23

Secondary structure

Answer 23

Spiral of plea when folded

Question 24

Quaternary structure

Answer 24

*results from the interaction among 7 polypeptides ( subunits) in a single protein
*irons role

Question 25

The importance of polypeptide

Answer 25

*denatured by organic solvents
*chemical agents
*Heat
*ph changes

Question 26

Nucleic acids

Answer 26

*hereditary
*dna and rna
DNA and evolution

Question 27

When was primary structure sequenced in the laboratory

Answer 27

By Sanger 1940-1950