Exam 3: Biological Molecules

As shown in this figure, the valine and lysine in this protein are linked by covalent bonds within the ________ structure, whereas the hydrogen bonds hold together molecules within the helical ________ structure.

Imagine that you have isolated a mysterious liquid from a sample of food. You add the liquid to a beaker of water and shake vigorously. After a few minutes, the water and the other liquid separate into two layers. To which class of biological molecules does the unknown liquid most likely belong?

A peptide bond forms between which of these groups?

The specific function of a protein is determined by the:

What are the four major types of biological molecules?

Which of the following include monosaccharide monomers?

Which of the following lipids make up about 2% of the human brain?

Why is it an advantage for animals that migrate long distances to store energy as lipids rather than carbohydrates?

________ molecules are synthesized from carbon skeletons bonded to hydrogen atoms.

Which of the following provides long-term energy storage for plants?

Enzymes are ________ that orchestrate chemical reactions within the body.

All of the following are polypeptides EXCEPT:

Which of the following can serve as an energy source and as structural support in plant cells?

All of the following lipids or lipid components are hydrophobic EXCEPT:

As shown in this figure, the top triglyceride (a)has ________, whereas the bottom triglyceride (b)has ________.

Which of the following biological molecules are composed of monomer units containing a sugar, a phosphate group, and a nitrogen-containing base?

Your classmate is trying to keep all the facts about biological molecules straight. He asks you to explain how amino acids and proteins are related. What do you tell him?

The linear arrangement of amino acids in a polypeptide chain is referred to as the ________ structure of the protein.

Adenosine triphosphate is an example of a(n):

Fatty acids with a carboncarbon double bond are called ________.