Question 1

Which functional group is represented by the structure in Image 1?

Accepted Answer

Carboxyl group

Question 2

The structure in Image 2 is characteristic of which class of organic compounds?

Accepted Answer

Amines

Question 3

Which functional group is shown in Image 3, and what is its suffix in IUPAC nomenclature?

Accepted Answer

Amide group, suffix: -amide

Question 4

The structure in Image 4 represents which functional group?

Accepted Answer

Acyl halide

Question 5

Which functional group is depicted in Image 5, and what is a common example of a compound containing this group?

Accepted Answer

Imine group; example: Schiff base

Question 6

The structure in Image 6 is known as a phenyl group. Which of the following compounds contains a phenyl group?

Accepted Answer

Phenol

Question 7

Which type of organic reaction is illustrated in Image 7 by the conversion of ethene to dibromoethane?

Accepted Answer

Addition reaction

Question 8

Image 8 shows a reaction where chlorine atoms are introduced to a benzene ring. What type of reaction is this?

Accepted Answer

Substitution reaction

Question 9

The reaction in Image 9 is an example of which type of organic reaction?

Accepted Answer

Substitution reaction

Question 10

In Image 10, which reagent is responsible for the oxidation of a primary alcohol to an aldehyde?

Accepted Answer

PCC

Question 11

Image 11 illustrates the formation of a peptide bond. What type of reaction is this?

Accepted Answer

Condensation (dehydration synthesis)

Question 12

Which functional groups are present in the amino acid structure shown in Image 12?

Accepted Answer

Amino and carboxyl groups

Question 13

Based on Image 13, which amino acid is not optically active?

Accepted Answer

Glycine

Question 14

Which amino acid shown in Image 14 contains a sulfur atom in its side chain?

Accepted Answer

Methionine

Question 15

Which amino acid in Image 16 contains a thiol group?

Accepted Answer

Cysteine

Question 16

Image 17 shows the structures of aspartic acid and glutamic acid. What is the charge of their side chains at physiological pH?

Accepted Answer

Negative

Question 17

The reaction in Image 18 is an example of which process?

Accepted Answer

Esterification

Question 18

Which of the following is a requirement for a carbon atom to be a chiral center, as illustrated in Image 19?

Accepted Answer

It must be bonded to four different groups.

Question 19

According to Image 20, which of the following is NOT a criterion for chirality?

Accepted Answer

Presence of a plane of symmetry

Question 20

In Image 21, what does a positive value of $$[\alpha]^T_D$$ indicate about the optical activity of a compound?

Accepted Answer

It is dextrorotatory (rotates light to the right)

Biochemistry Study Notes: Functional Groups, Amino Acids, Proteins, Enzymes, and Metabolism

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