Question 1 (1 point)

Which of the following is a type of bond that holds the atoms of a molecule together

Question 1 options:

1)weak

2)hydrophobic

3)hydrogen

4)covalent

Question 2 (1 point)

Match the description to the most likely type of biomolecule.

Question 2 options: 1 2 3 4

is released from pancreas as part of the reflex response loop to high blood glucose concentration

is predominantly non-polar

cell surface receptor for insulin

is not a polymer

includes ATP

breaks down to amino acids

1.carbohydrate

2.protein

3.nucleic acids

4.fats

Question 3 (1 point)

Choose all of the following that are characteristics of non-polar molecules.

Question 3 options:

1)aggregates in water

2)composed mostly of hydrocarbon

3)is hydrophilic

4)has the properties of glucose

Question 4 (1 point)

Choose all of the following characteristics that apply to fats

Question 4 options:

1)tend to aggregate in water

2)can form a barrier separating aqueous compartments

3)include insulin

4)has polymer structure

5)can be amphipathic

Question 5 (1 point)

Choose all of the following that are characteristics of carbohydrates

Question 5 options:

1)are expected to aggregate in water

2)polymer is glycogen

3)subunits are nucleotides

4)formed in muscle cells in response to glucagon

5)broken down in liver cells stimulated by glucagon

Question 6 (1 point)

Choose all of the following that are characteristics of nucleic acids

Question 6 options:

1)are polymers of nucleotides

2)form stable interactions between identical molecules

3)can determine the order of amino acids of a protein

4)are composed of sugar subunits

Question 7 (1 point)

Choose all of the following that are characteristics of a protein

Question 7 options:

1)is a polymer of amino acids

2)functions only as a properly folded structure

3)order of amino acids determines folded form of structure

4)bind ligand mainly by covalent bonds

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