AP1 Walling Unit 1 Review (Q.10-Q.30)

What activates the G-protein in signal transduction?

• ATP synthesis

• Enzyme binding

• GDP binding to receptor

• Ligand binding to a receptor

The α-subunit of a G-protein becomes active when:

• It dissociates from the β-subunit

• It binds GTP

• It enters the nucleus

• It binds GDP

G-protein is named after what molecule it binds to?

• Glutamine

• Glucagon

• Glucose

• Guanine

True or False: G-protein signal transduction is a one-step process.

• Cannot be determined

• Partially true

• False

• True

Which of the following is a CAM (Cell Adhesion Molecule)?

• Actin

• Integrin

• Collagen

• Albumin

Tight junctions are most likely found in:

• Brain neurons

• Intestinal lining

• Skin epidermis

• Heart muscle

What is the function of an enzyme?

• Store DNA

• Increase activation energy

• Transport ions

• Speed up chemical reactions

True or False: Desmosomes allow molecules to pass between cells.

• True

• False

• Cannot be determined

• Partially true

What are the two main steps of protein synthesis?

• Translation and Replication

• Transcription and Mutation

• Transcription and Translation

• Replication and Translation

A codon is composed of how many bases?

• 2

• 6

• 3

• 4