Membrane Protein

What is the structure of membrane proteins?

• Membrane proteins are composed entirely of hydrophobic regions.

• Membrane proteins are unable to span the lipid bilayer of cell membranes.

• Membrane proteins are only found on the surface of cell membranes.

• Membrane proteins have hydrophobic and hydrophilic regions that allow them to span the lipid bilayer of cell membranes.

Name one function of membrane proteins.

• Energy production

• Structural support

• Transporters, receptors, and enzymes

• Cell division

What are transport proteins?

• Transport proteins are proteins that are involved in the synthesis of molecules within the cell.

• Transport proteins are proteins that are only found in the cytoplasm of the cell.

• Transport proteins are proteins that are responsible for cell division.

• Transport proteins are membrane proteins that facilitate the movement of molecules across the cell membrane.

How do membrane proteins contribute to cell communication?

• Membrane proteins act as receptors or channels for signaling molecules or ions and facilitate cell adhesion and cell-cell communication.

• Membrane proteins inhibit cell communication.

• Membrane proteins have no role in cell communication.

• Membrane proteins only contribute to intracellular communication.

What are integral membrane proteins?

• Proteins that are only temporarily attached to the cell membrane

• Proteins that are not involved in cell membrane functions

• Proteins permanently attached to the cell membrane

• Proteins that are found in the cytoplasm

What are peripheral membrane proteins?

• Proteins temporarily attached to the membrane surface or associated with the lipid bilayer

• Proteins that are only found in the cytoplasm

• Proteins permanently embedded within the lipid bilayer

• Proteins that are only found in the nucleus

What is the role of membrane proteins in signal transduction?

• Membrane proteins are only involved in cell adhesion.

• Membrane proteins act as receptors or channels for signal transduction.

• Membrane proteins inhibit signal transduction.

• Membrane proteins have no role in signal transduction.

Tags

NGSS.HS-LS2-3

What are the different types of transport proteins?

• channels, carriers, and pumps

• nucleotides, amino acids, and lipids

• enzymes, receptors, and inhibitors

• organelles, tissues, and organs

How do carrier proteins facilitate the movement of molecules across membranes?

• By creating a barrier that prevents molecules from crossing the membrane.

• By breaking down molecules into smaller components.

• By binding to specific molecules and undergoing conformational changes.

• By releasing molecules into the extracellular space.

What is the significance of channel proteins in membrane transport?

• Channel proteins are not involved in membrane transport.

• Channel proteins allow the movement of all substances across the cell membrane.

• Channel proteins are only found in prokaryotic cells.

• Channel proteins facilitate the selective movement of substances across the cell membrane.