Functional Groups

What functional group is shown in red?

• carboxyl group

• hydroxyl group

• amino group

• phosphate group

Answer explanation

The red functional group is the amino group, characterized by the presence of a nitrogen atom bonded to one or more hydrogen atoms. This distinguishes it from the carboxyl, hydroxyl, and phosphate groups.

What functional group is shown in red?

• carboxyl group

• hydroxyl group

• amino group

• phosphate group

Answer explanation

The red functional group is a carboxyl group, characterized by a carbon atom double-bonded to an oxygen atom and single-bonded to a hydroxyl group (-COOH). This distinguishes it from hydroxyl, amino, and phosphate groups.

Which functional group is shown in red?

• carboxyl group

• hydroxyl group

• amino group

• phosphate group

Answer explanation

The red functional group is a hydroxyl group, characterized by the presence of an -OH (hydroxyl) functional group. This distinguishes it from the other options, which have different structures and properties.

Which functional group is shown?

• carboxyl group

• hydroxyl group

• amino group

• phosphate group

Answer explanation

The phosphate group is characterized by a phosphorus atom bonded to four oxygen atoms, one of which is typically double-bonded. This distinguishes it from carboxyl, hydroxyl, and amino groups, making it the correct choice.

Which functional group is shown in red?

• amino group

• phosphate group

• carbonyl group

• sulfhydryl group

Answer explanation

The red functional group is a carbonyl group, characterized by a carbon atom double-bonded to an oxygen atom. This distinguishes it from the other options, such as amino, phosphate, and sulfhydryl groups.

What functional group is shown in yellow?

• amino group

• phosphate group

• carbonyl group

• sulfhydryl group

Answer explanation

The yellow functional group is a sulfhydryl group, characterized by a sulfur atom bonded to a hydrogen atom (–SH). This group is distinct from amino (–NH2), phosphate (–PO4), and carbonyl (C=O) groups.

Which functional group contains ketones and aldehydes?

• amino group

• phosphate group

• carbonyl group

• sulfhydryl group

Answer explanation

The carbonyl group is characterized by a carbon atom double-bonded to an oxygen atom. Both ketones and aldehydes contain this functional group, making 'carbonyl group' the correct answer.

Alcohols have this functional group:

• carboxyl group

• hydroxyl group

• amino group

• phosphate group

Answer explanation

Alcohols contain a hydroxyl group (-OH), which is the defining functional group for this class of compounds. The other groups listed (carboxyl, amino, phosphate) are associated with different types of organic compounds.

Proteins contain this functional group:

• carboxyl group

• hydroxyl group

• amino group

• phosphate group

Answer explanation

Proteins are made up of amino acids, which contain an amino group (-NH2) as a key functional group. This group is essential for the formation of peptide bonds, linking amino acids together to form proteins.

Which of these functional groups is carboxyl?

• -CO

• -NH2

• -CH3

• COOH

Answer explanation

The carboxyl functional group is represented as -COOH. It consists of a carbon atom double-bonded to an oxygen atom and also bonded to a hydroxyl group (-OH). The other options do not represent carboxyl groups.