$$DNA \rightarrow RNA \rightarrow \text{proteins}$$

Question 1

Which of the following functional groups is present in all amino acids? (Refer to the first image for options.)

Accepted Answer

Carboxyl group (C)

Question 2

Which functional group shown in the first image is most likely to act as a base and accept a proton ($$H^+) in $$solution?

Accepted Answer

Amino group (D)

Question 3

Which electron configuration in the second image depicts an atom capable of forming three covalent bonds with other atoms?

Accepted Answer

C

Question 4

The third image shows a chemical reaction between two atoms. What is the result of this reaction?

Accepted Answer

A cation with a net charge of +1 and an anion with a net charge of -1

Question 5

Which molecule in the fourth image is impossible based on the rules of covalent bonding?

Accepted Answer

C

Question 6

The two molecules shown in the fifth image are best described as:

Accepted Answer

Structural isomers

Question 7

Which type of reaction is illustrated in the sixth image, where two amino acids are joined together?

Accepted Answer

It results in the formation of a peptide bond.

Question 8

Which of the following best describes the flow of genetic information in eukaryotic cells?

Accepted Answer

$$DNA ightarrow RNA ightarrow 	ext{proteins}$$

Question 9

A lake has a pH of 4.0. What is the hydrogen ion concentration of the lake?

Accepted Answer

$$10^{-4}$$ \ 	ext{M}$$

Question 10

Which of the following statements best distinguishes hypotheses from theories in science?

Accepted Answer

Hypotheses are usually narrow in scope; theories have broad explanatory power.

Question 11

Which of the following is true of both starch and cellulose?

Accepted Answer

They are both polymers of glucose.

Question 12

Which of the following is true regarding saturated fatty acids?

Accepted Answer

They are the principal molecules in lard and butter.

Question 13

Which of the following best describes covalent bonds?

Accepted Answer

Sharing of electrons

Question 14

Which of the following is a correct sequence of levels in life's hierarchy, proceeding downward from an individual animal?

Accepted Answer

Nervous system, brain, nervous tissue, nerve cell

Question 15

Polysaccharides, nucleic acids, and proteins are similar in that they:

Accepted Answer

Are synthesized from subunits (monomers) by dehydration reactions.

BIOB 160 Exam #1 Study Guidance: Functional Groups, Electron Configurations, Chemical Bonds, and Macromolecules

Study Guide - Practice Questions