Chapter 5 - Proteins Flashcards Preview

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Flashcards in Chapter 5 - Proteins Deck (17):
1

Define: Proteins

Makes up 50% of dry mass of most cells
Polymers of Amino acids - Polypeptides

2

What is the function of an enzymatic protein? What is an example?

Function: selective acceleration of chemical reactions

Ex. digestive enzymes catalyze the hydrolysis of bonds in food

3

What is the function of storage proteins? What is an example?

Function: Storage of amino acids

Ex. Casein an ovalbumin

4

What is the function of hormonal proteins? What is an example?

Function: coordination of an organisms activities

Ex. Insulin

5

What is the function of contractile and motor proteins? What is an example?

Function: movement

Ex. Actin and myosin
(Myosin fibers are strongly attracted to actin.)
Muscles

6

What is the function of defensive proteins? What is an example?

Function: protect against disease

Ex. Antibodies

7

What is the function of transport proteins? What is an example?

Function: transport of substances

Ex. Hemoglobin and proteins found in cell membrane

8

What is the function of receptor proteins? An example?

Function: response of cell to chemical stimuli

Ex. Receptors in a nerve cell

9

What is the function of structural proteins? What is an example?

Function: support

Ex. Keratin and collagen

10

Amino Acid Monomers consist of?

Amino Acid Monomers will always consist of Amino group, alpha carbon, and Carbonyl group.

11

Non-polar side chains are which of the following?

A) hydrophobic
B) hydrophilic

Hydrophobic

12

Polar side chains are which of the following?

A) hydrophobic
B) hydrophilic

Hydrophilic

13

Electrically charged side chains are which of the following?

A) hydrophobic
B) hydrophilic

B) hydrophilic

14

What is a primary structure of Amino acids?

One long line of Amino acids.
(Always goes from primary to secondary that are put together by hydrogen bonds)

15

What is a secondary structure?

Makes a helix

16

What is a tertiary structure?

It has a bunch of Amino acids inside (might have a few alpha-helix, pleated sheets)

17

What is a quaternary structure?

Putting a bunch of proteins together to make certain structure (ex. Hemoglobin)