Nat 5 Key Area 1.4 Proteins

Antibodies are composed of..

• starch

• protein

• glucose

• glycerol

Proteins have different functions. Which of the following statements identifies a protein and its function?

• Hormones carry chemical messages around the body

• Antibodies forms body structures

• Cellulose provides strength and structure to a plant cell wall

• Structural proteins are part of our immune system

What amount of living cells produce enzymes?

• All

• Most

• Some

• A few

Which line in the table correctly shows information about an enzyme?

• A

• B

• C

• D

Which number in the diagram shows the active site?

• 1

• 2

• 3

• 4

• 5

The diagram below shows three stages X, Y and Z that occur when an enzyme converts a substrate into a product. Which of the following order of stages represents a synthesis reaction?

• Z-> Y -> X

• X -> Y -> Z

• X-> Z -> Y

• Z-> Y-> X

The diagram below shows three stages X, Y and Z that occur when an enzyme converts a substrate into a product. Which of the following order of stages represents a

degradation reaction?

• Z -> Y -> X

• Y -> Z -> X

• X-> Z-> Y

• Y-> Z-> X

Which of the following is not an example of a protein?

• Starch

• Antibodies

• Enzymes

• Hormones

What determines the shape of a protein?

• The amino acid sequence of a protein

• The function the protein carries out

• The location in the cell where protein is assembled

What is the name of a substance that speeds up the rate of a chemical reaction, but is unchanged in the process?

• Catalyst

• Active Site

• Product

• Substrate