Exam 3: Proteins, Carbohydrates, and Lipids

The tertiary structure of a protein is determined by its

Refer to the table and figures below. A student is creating a table showing lipids and their biological functions.He drew three molecular structures to represent lipids A, B, and C.In the last row of the table, the student should pair which compound with which function?

An amino acid is considered both an acid and a base because it has an amino and a carboxyl functional group, which are ionized by the addition or loss of

The bonds that link sugar monomers in a starch molecule are _______ bonds.

Refer to the figure below. The structure shown contains repeating monomers of the monosaccharide glucose joined by -1,4 glycosidic linkages in the main chain and _______ linkages at the branch point.

Which amino acid would, when incorporated into a polypeptide chain (not at the N or C terminus), make the charge of the polypeptide more positive?

How many unique polypeptide chains are there of 50 amino acids in length?

Refer to the diagram of a phospholipid bilayer below. The membrane structure shown in the diagram forms in water because each phospholipid

Triglyceride A contains three saturated long-chain fatty acids.Triglyceride B contains three unsaturated long-chain fatty acids.Triglyceride _______ is more likely to be liquid at room temperature.

A type of protein that functions by helping other proteins fold correctly is called a

The fluidity and melting point of triglycerides are partially determined by the number of _______ bonds in their hydrocarbon tails.

The amino acids of the protein keratin are arranged in a helix.This secondary structure is stabilized by

Keratin and hemoglobin are both proteins with important functions in the human body.Keratin has a long, thin, rope-like structure with a structural role in hair, fingernails, and skin.Hemoglobin has a compact, round, globular structure with a transport role in carrying oxygen to body cells from the lungs.Which statement best explains how both keratin and hemoglobin can be classified as proteins yet have such different structures and functions?

The theoretical number of different tripeptides that can be made from 10 amino acids is _______.

Refer to the figure below of a hemoglobin protein. The hemoglobin protein has four subunits.If it were exposed to high temperatures, it would most likely

How does synthesis of a triglyceride compare with synthesis of a disaccharide?

How many different types of tripeptides (molecules of three amino acids linked together) can be synthesized from the 20 common amino acids?

Refer to the graph below, showing data collected from harbor porpoises in eastern Scotland. Based on these data, which biological function is associated with the lipids found in fats under the skin (subcutaneous fats) in harbor porpoises?

Refer to the figure and table below. A table of triglyceride melting points is under construction.Each triglyceride contains 3 fatty acids having identical structures.The table will show their melting points in order, from lowest to highest.The triglyceride indicated by the letter B is _______ acid.

All of the following are macromolecules except