Question 8 (1 point)

Choose all of the following that are characterstics of a given enzyme

Question 8 options:

1)an enzyme increases rate of a chemical reaction

2)all proteins are enzymes

3)an enzyme binds substrate and releases product

4)an enzyme is typically a protein

5)a typical enzyme can catalyze any reaction

6)interactions between enzyme and substrate are weak

Question 9 (1 point)

Choose all of the following that correctly characterize the interaction of a protein with a ligand

Question 9 options:

1 the ligand binds to a specific 3D structure of the protein

2 is independent of the shape of the ligand

3 stability depends on the number of weak interactions

4 a ligand binds stably to any protein binding site

Question 10 (1 point)

Choose all of the following that are characteristics of weak interactions

Question 10 options:

1 weak interactions form biological membranes

2 weak interaction occur between the subunits of the glycogen molecule

3 multiple weak interactions are required for stable interaction between a protein and its ligand

4 each weak interaction between strands of DNA is stable

Question 11 (1 point)

A glucose A1C test shows that person X has an average blood glucose of 100 mg/dl. A response to hyperglycemia is triggered by blood glucose of 120 mg/dl. A hypoglycemic response is triggered by 80 mg/dl. Which of the following are consistent with the homeostasis of blood glucose with respect to person X.

Question 11 options:

1 both alpha and beta cells of pancreas secrete hormone when blood glucose is above 120 mg/dl

2 100 mg/dl glucose causes alpha cells of the pancreas to secrete glucagon

3 100 mg/dl is the equilibrium concentration of blood glucose

4 100 mg/dl is the set point for reflex response

5 during a period of time in which blood glucose goes from 70 mg/dl to 140 mg/dl, hormone release by both alpha and beta cells of the pancreas change