Biology: Enzymes

What is the name of the substance that is acted upon by an enzyme?

• Coenzyme

• Substrate

• Cofactor

• Catalyst

Enzymes are made up of

• Carbohydrates

• Lipids

• Nucleic Acid

• Protein

Tags

NGSS.HS-LS1-1

Based on the diagram, which of the following best describes the characteristics of enzymes

• Enzymes speed up chemical reaction

• Enzymes remain unchanged at the end of the reaction

• Enzymes lower the activation energy

• Enzymes break down reactants into products

Tags

NGSS.HS-PS1-5

What happens when enzymes are heated to a high temperature

• The shapes of the enzymes are altered

• The enzymes amino acids sequence change

• The enzymes remain the same

• The activity of enzymes increase

Which of the following enzymes can be found in the stomach?

• Amylase

• Pepsin

• Cellulase

• Maltase

Which of the following conclusion can be drawn from this graph?

• The activity of the enzyme increases from pH 5 to 9

• The optimum pH of the enzyme is 8

• The enzyme activity is greatest at pH 10.5

• The enzyme is denatured at pH 9

Based on the lock and key hypothesis, which of the following is correct?

I. The enzyme is the lock

II. The enzyme is the key

III. The substrate binds to the enzyme forming an enzyme-substrate complex

IV. The reaction takes place at the active sites of the enzyme

• I, III, IV

• II, III, IV

• I, III

• III, IV

What is being represented by letter C in the picture?

• Enzymes

• Substrate

• Product

• Active sites

What is a substance called if it speeds up a chemical reaction?

• Specific

• Substrate

• Catalyst

• Product

Which of the following is not true?

• Enzymes speed up chemical reaction

• Enzymes can only be used once in a chemical reaction

• Extreme pH can denature enzymes

• Enzymes alter its shape to fit into the substrate molecules

Tags

NGSS.HS-PS1-2