Unit 1-Proteins

Question 1

Joined together to make proteins

Answer 1

Amino Acids

Question 2

Type of protein that forms muscles and membranes

Answer 2

Structural proteins

Question 3

Type of protein that acts as a chemical messenger that is carried in the blood

Answer 3

Hormones

Question 4

Type of protein that defends the body against disease

Answer 4

Antibody

Question 5

Type of protein on the cell surface with a shape complementary to a hormone

Answer 5

Receptor

Question 6

Scientific term for any substance that speeds up a reaction

Answer 6

Catalyst

Question 7

Type of protein that is known as a biological catalyst

Answer 7

Enzyme

Question 8

After it has catalysed a biological reaction, an enzyme’s shape is…

Answer 8

unchanged

Question 9

The part of an enzyme with a shape complementary to its specific substrate

Answer 9

Active site

Question 10

Molecule an enzyme changes AND the molecule produced

Answer 10

Substrate AND Product

Question 11

An enzyme reaction in which a large molecule is built up from smaller molecules

Answer 11

Synthesis

Question 12

An enzyme reaction in which a large molecule is broken down into smaller molecules

Answer 12

Degradation

Question 13

An example of a synthesis reaction

Answer 13

Glucose-1-phosphate molecules being joined together to form a starch molecule by the enzyme phosphorylase

Question 14

An example of a degradation reaction

Answer 14

Hydrogen peroxide broken down into oxygen and water by the enzyme catalase

or

Starch is broken down into maltose by the enzyme amylase

Question 15

The temperature or pH in which an enzyme works fastest

Answer 15

Optimum

Question 16

Unable to function because of a change in shape - the reason why enzymes stop working in high temperatures

Answer 16

Denatured