Enzymes and Chemical Reactions

The image above is a process that occurs in the human body to break down dipeptides. What would happen if the person had a high fever that changed the shape of the active site?

• the dipeptide would digest faster

• the dipeptide would digest slower or not at all

• the amino acid would combine faster

• the amino acid would combine slower or not at all

A group of biology students wants to study the effects of pH on enzyme activity. They measure the activity of enzymes A and B at various pHs and record their data in the graph. A solution of enzyme A has a pH of 8. Based on the graph, which pH would result in a higher enzyme activity?

• Decreasing the pH of the solution to 2

• decreasing the pH of the solution to 6

• increasing the pH of the solution to 10

• increasing the pH of the solution to 12

An enzyme is which type of macromolecule?

• Protein

• carb

• lipid

• nucleic acid

Tags

NGSS.HS-LS1-1

NGSS.HS-LS1-6

What monomer builds an enzyme

• Monosaccharides

• fatty acids

• amino acids

• nucleotides

Tags

NGSS.HS-LS1-1

What structure is label B?

• Enzyme substrate complex

• substrate

• active site

• products

What structure is the enzyme/substrate complex?

• A

• B

• C

• D

Salivary Amylase functions best at a pH of 6.8. When it reaches the stomach it no longer functions. Why is this?

• The pH of the stomach is too low causing the amylase to denature

• The temperature of the stomach is too low causing amylase to denature

• The temperature of the stomach is too high, causing the amylase to denature

• The pH of the stomach is too high, causing the amylase to denature

What is a substance called if it speeds up a chemical reaction by lowering its activation rate?

• reusable

• catalyst

• specific

• fragile

Antacids are substances that work to neutralize stomach acid. What effect will antacids have on the enzymes in the stomach and their functions?

• stomach enzymes will not be affected by this chnage

• stomach enzymes will denature causing them to function optimally

• stomach enzymes will denature, causing them to lose their function

• stomach enzymes will not denature but will slow down, causing a lower reaction rate

Tags

NGSS.HS-PS1-5

What kind of reaction is performed in chemical reactions using enzymes?

• dehydration synthesis

• endothermic

• hydrolysis