Chapter 1.5 Proteins and Enzymes Flashcards Preview

FULL COURSE National 5 Biology > Chapter 1.5 Proteins and Enzymes > Flashcards

Flashcards in Chapter 1.5 Proteins and Enzymes Deck (17):
1

The variety of protein shapes arises from the sequence of

amino acid in their molecules.

2

The shape of protein molecules affects their

function

3

The functions of proteins included;

structural, enzymes, hormones, antibodies and receptors.

4

Structural proteins make up cell structures such as

membranes

5

Enzymes function as

biological catalysts and are made by all living cells such as amylase

6

Hormones are

chemical messengers produced by the endocrine gland such as insulin

7

Antibodies are protein molecules that are involved in

body defenses such as immunoglobulins

8

Receptors are found in

cell membranes and recognize specific substances such as the receptors for insulin in the liver.

9

Enzymes speed up

cellular reactions and are unchanged in the process

10

The substance upon which an enzyme acts is called its

substrate

11

Where an enzymes bonds to the substrate is called its

active site

12

Enzymes are specific and as as a result the shape of the active site of each enzyme molecule is

complementary to the shape of its substrate.

13

Each type of enzyme works best in its

optimum conditions

14

enzymes and other proteins are affected by

temperature and pH

15

Extremes of temperature or pH can result in changes to shape of the enzyme know as

denaturation

16

A change in the molecular shape of any enzyme will affect its

rate of reaction

17

A change in the molecular shape of any protein molecule will affect its

function