Keystone Homwork #5

A student made the claim shown . Which statement best explains whether the student’s claim is correct?

• The student’s claim is correct because carbohydrates form DNA

• The student’s claim is correct because all complex molecules store data .

• The student’s claim is incorrect because carbohydrates are simple compounds, not complex ones .

• The student’s claim is incorrect because nucleic acids, not carbohydrates, are the datastorage molecules

DNA replication in a eukaryotic cell occurs in the presence of the enzyme DNA polymerase . Which effect is most likely caused by a pH change in the cell nucleus?

• The rate of DNA replication will decrease .

• The energy required to initiate DNA replication will decrease .

Which action must occur for an enzyme to catalyze a chemical reaction?

• A competitive inhibitor must first bind to an active site .

• A substrate must bind to an active site of the enzyme .

. The element carbon has multiple bonding patterns. Which bonding pattern cannot be formed by carbon?

• C—C

• C—C—C

• C≡C≡C

Which statement best describes a relationship between enzymes and a simple biological reaction?

• Enzymes will increase the amount of substrate formed during a biological reaction.

• Enzymes will decrease the amount of substrate formed during a biological reaction.

• A reaction rate can be increased when the specific enzyme for a biological reaction is present.

Which action must occur for an enzyme to catalyze a chemical reaction?

• A competitive inhibitor must first bind to an active site.

• A substrate must bind to an active site of the enzyme.

• A substrate must bind to an allosteric site of the enzyme

Which statement best describes the event shown in the diagram? A. Glucose is being synthesized in the chloroplast using nitrogen from plants. B. Amino acid monomers are joining together to form a protein macromolecule.

• Glucose is being synthesized in the chloroplast using nitrogen from plants.

• Amino acid monomers are joining together to form a protein macromolecule.

Carbonic anhydrase is an enzyme involved in the reaction of carbon dioxide with water to form a molecule that dissolves well in the liquid part of blood. How does carbonic anhydrase affect this reaction?

• by making the reaction reversible

• by decreasing the amount of energy needed to complete the reaction