Question

1. you will need to master the chart we made in class, related to functional groups and the information in it. using the functional groups from that chart, see if you can match the functional group with each letter below:

a. -nh₂
b. can form cross - links that stabilize protein structure
c. key component of atp
d. can affect gene expression
e. ch₃
f. is always polar
g. determines the two groups of sugars
h. has acidic properties
i. -cooh
j. acts as a base
k. circle and identify three functional groups in the molecule shown above.

Explanation:

a. -NH₂ is an amino group. It can act as a base.
b. Sulfhydryl groups can form cross - links that stabilize protein structure. But not mentioned in given list.
c. Phosphate groups are key components of ATP. Not mentioned in given list.
d. Methyl groups (-CH₃) can affect gene expression.
e. CH₃ is a methyl group.
f. Hydroxyl groups (-OH) are always polar.
g. The presence or absence of a carbonyl group determines the two groups of sugars (aldoses and ketoses). Not mentioned in given list.
h. Carboxyl groups (-COOH) have acidic properties.
i. -COOH is a carboxyl group.
j. Amino groups (-NH₂) act as bases.
k. In the molecule shown, the functional groups are carboxyl (HO - C=O), hydroxyl (OH) and amino (NH₂).

Answer:

a. Amino group, acts as a base
d. Methyl group
e. Methyl group
f. Hydroxyl group
h. Carboxyl group
i. Carboxyl group
j. Amino group
k. Carboxyl group, Hydroxyl group, Amino group