Living Environment Review

Molecules C, D, and E will combine to form part of...

• a polypeptide

• a polysaccharide

• DNA

• RNA

What does Structure B represent a molecule of?

• nuclear DNA

• cytoplasmic DNA

• ribosomal RNA

• transfer RNA

How many codons are located on the messenger RNA molecule in the diagram?

• 1

• 6

• 3

• 9

The type of molecule represented at A is synthesized according to a template found in

• DNA

• RNA

• dipeptides

• amino acids

The molecule coded directly from DNA is represented by number

• 1

• 2

• 3

• 4

What is an example of a molecule produced by this type of process?

• glucose

• glycogen

• a fatty acid

• a protein

What is the bond labeled 5 known as?

• a peptide bond

• a hydrogen bond

• an ionic bond

• a carboxyl bond

The diagram represents a step in protein synthesis. If a sequence of nitrogenous bases on DNA strand I is T-A-G-C-C-T-A, the corresponding sequence on the RNA will be

• A-T-C-G-G-A-T

• A-U-C-G-G-A-U

• T-A-G-C-C-T-A

• U-T-C-G-G-U-T

The diagram represents a step in protein synthesis. The molecule labeled "RNA polymerase" is classified as

• a carbohydrate

• a lipid

• an enzyme

• a neurotransmitter

During this step in the process of protein synthesis, information is passed from

• DNA strand I to RNA

• DNA strand II to RNA

• RNA to DNA strand I

• RNA to DNA strand II