Bio Post-Test

How many molecules of water are required to completely hydrolyze a polypeptide made up of 23 amino acids?

22

Classify A and B of Figure 6-5 as either saturated or unsaturated. Explain.

A is saturatedmcontains only single bond-bonded to as many hydrogens as possible B is unsaturated because it contains a double bond-less hydrogens bonded to 2 carbons

What is a difference between adhesion and cohesion?

Adhesion is the attraction of 'unlike' substances while cohesion is the attraction of 'like' substances.

Which of the following graphs shows the relationship between temperature and enzyme activity with a fixed concentration of enzyme?

B

Which of the following correctly shows a peptide bond between two amino acids?

C

Which of the following is the main function of glycogen in animals?

Energy storage

Which type of molecule is shown in the diagram below? (long cahain)

Fatty acid chain

Which of the following are connected by hydrogen bonds?

Hydrogen to oxygen between two different molecules of water

What chemical reaction is taking place when a dipeptide becomes two amino acids?

Hydrolysis

The diagram below represents part of the DNA molecule.

I: covalent bond, II: nitrogenous base, III: deoxyribose

What is the primary difference between galactose and lactose?

Lactose is a disaccharide and galactose is a monosaccharide.

Which type of molecule is shown below? (Looks like a cell)

Monosaccharide

Which molecule is found in both DNA and RNA?

Phosphate

Which type of macromolecule can have a structure like the one shown below? (Party confetti)

Protein

When substrate concentration increases, in a reaction catalyzed by an enzyme, why does the rate of reaction increase?

The substrate molecules collide more frequently with the active site.

Blood is a water-based transport medium. Which property of water makes it a good transport medium?

Versatility as a solvent

Which statement about water is correct?

Water molecules are polar, therefore fatty acids do not dissolve.

Which of the following statements about the function of lipids in the body in FALSE?

fat is necessary to absorb water-soluble vitamins