Which of the following pairs correctly pairs the type of microscope you would use to the biological question?

A) Transmission electron microscope – How fast does a flagellum spin?
B)A light microscope – Where are ribosomes located in plant cells?
C) A light microscope – What is the shape of the protein lactase?
D) The unaided eye – What is the shape of cellular organelles?
E) Scanning electron microscope – What is the shape of the bacteria in a sample?

A protein in a plasma membrane binds to a ligand, which changes the shape of the protein. When the shape of the protein changes and sends a signal to the other side of the membrane, and this changes the function of the cell. This protein is an example of a
A) Transporter protein
B) Cell surface receptor.
C) Channel.
D) Cell surface identity marker protein.
E) Cell-to-cell adhesion protein.

When an enzyme couples an endergonic reaction to an exergonic reaction, then
A)heat provides all of the energy to drive the endergonic reaction.
B) all the energy is released as heat.
C)

Which of the following would have a cell wall that contains cellulose, but not chitin or proteoglycans?

A) a prokaryote
B) an animal cell
C) a bacterial cell
D) the cells of fungi
E) a plant cell

The sodium-potassium ATPase proteins in plasma membranes
A) are symporters.
B) transport sodium into cells and potassium out of cells
C) have higher affinity for sodium when the sodium binding sites are on the extracellular side.
D) use ATP to move sodium and potassium against their concentration gradients.
E) are channels that are selectively permeable to the cations sodium and potassium.