Question 1

The graph shows the activity of an enzyme called glucosidase. What can you conclude from this data?

Accepted Answer

Glucosidase functions best around 70°C.

Answer

Glucosidase is not affected by temperature.

Answer

Glucosidase does not function below 70°C.

Answer

Glucosidase breaks down glucose substrates.

Question 2

Proteins are long molecules that are built from various combinations of -

Accepted Answer

amino acids

Answer

lipids

Answer

nucleic acids

Answer

carbohydrates

Question 3

The diagram shows how an enzyme (black) binds to a substrate (white) when catalyzing a chemical reaction. When this reaction is complete, the —

Accepted Answer

substrate will be a different molecule

Answer

hydrogen ion concentration will have decreased

Answer

surrounding temperature will have increased

Answer

enzyme’s shape will be different

Question 4

Complex carbohydrates, such as starch, are examples of polymers. Which scientific explanation below best describes a polymer?

Accepted Answer

Polymers are made of many small molecules that are similar or different.

Answer

Polymers are individual parts of a large molecule that are different.

Answer

Amino acids and nucleotides are examples of polymers.

Answer

Polymers are any molecules in which the atoms are held together by bonds.

Question 5

The primary function of DNA is to —

Accepted Answer

store information for building proteins

Answer

transmit messages between cells

Answer

make up cell membranes

Answer

provide energy for a cell

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