ENZYME REVIEW

What type of molecules are enzymes?

• carbohydrates

• lipids

• proteins

• nucleic acids

The place on the enzyme where a substrate binds is called the

• active site

• reaction site

• binding site

• digestion site

Enzymes are called catalysts because they

• make reactions happen

• slow reactions down

• stop reactions

• speed up reactions

Tags

NGSS.HS-PS1-2

NGSS.HS-PS1-5

Identify which of the following is a factor that can stop the action of an enzyme

• adding more enzyme

• heating the enzyme

• adding more substrate

• cooling or freezing the enzyme

According to this graph, what is the optimal temperature for this enzyme to function?

• 33

• 50

• 39

• 58

According to the graph, at what temperature do both enzymes function at the same rate?

• 50 degrees

• 60 degrees

• 45 degrees

• 20 degrees

Using the graph and WHAT YOU KNOW about pH and your body, which enzyme would most likely be found in the stomach?

• Enzyme A

• Enzyme B

• Both enzymes A and B

The enzyme lactase will break down the sugar lactose, but WILL NOT break down proteins.

This is because........

• lactase is never in the presence of proteins

• proteins are created by the enzyme lactase

• Proteins cannot be broken down

• enzymes are substrate specific

If the substrate in this diagram is starch, what would the products be?

• amino acids

• simple sugars

• proteins

• polysaccharides

If the products in the diagram are amino acids, what must the substrate be?

• a protein

• a starch molecule

• a polysaccharide

• a simple sugar

Tags

NGSS.HS-LS1-6