AP Biology Biomolecules Test Review

The observed differences between the groups most likely resulted from differences in the ability of the seedlings to produce which of the following monomers?

Protein (one with an N) and Nucleic Acid (one with a P)

The sequences for two short fragments of DNA are shown above. Which of the following is one way in which these two segments would differ?

Segment 1 would become denatured at a lower temperature than would segment 2 because A-T base pairs have two hydrogen bonds whereas G-C base pairs have three.

Which statement is the most accurate description of the reaction shown in Figure 1? (Picture: Water being added to molecule to separate it into two)

It represents a polypeptide chain that is broken down through a hydrolysis reaction.

A feature of organic compounds NOT found in inorganic compounds is the presence of

carbon atoms covalently bonded to each other

Which of the following is most directly responsible for water's unique properties?

It forms hydrogen bonds

Which of the following statements is correct? (Picture: graph with myoglobin and hemoglobin)

At 40 mmHg partial pressure, myoglobin has a greater affinity for oxygen than hemoglobin has.

Based on Figure 1, which of the following best describes how the properties of water at an air-water interface enable an insect to walk on the water's surface?

Hydrogen bonds between molecules at the surface of the water provide surface tension, which allows the water surface to deform but not break under the insect.

Which of the following is responsible for the cohesive property of water?

Hydrogen bonds between the oxygen atom of one water molecule and a hydrogen atom of another water molecule

Which of the following conclusions is most clearly supported by the representations of nucleic acid #1 and nucleic acid #2 ?

Nucleic acid #1 contains adenine-thymine base pairs, whereas nucleic acid #2 does not

Which of the following is an accurate description of the process shown in Figure 1 ? (Picture: Water being formed as a byproduct)

The formation of a covalent peptide bond in a dehydration synthesis reaction

Which of the following best describes the structures of carbohydrates?

They occur as monomers, chains of monomers, and branched structures.

The synthesis of protein or carbohydrate polymers always produces which of the following as a byproduct?

Water

Which of the following best describes the formation of the bond shown in Figure 1 ? (Picture: two molecules bonding between carbon and nitrogen)

A covalent bond is formed between a carbon atom and a nitrogen atom along with the formation of H2O.

Which of the following best describes how amino acids affect the tertiary structure of a protein?

The interactions of the different R -groups with other R -groups and with their environment determine the tertiary structure of the protein.