What does the horizontal axis represent in most line graphs?

Binding of _______ to the regulatory subunits of protein kinase A induces conformation changes that cause dissociation of the catalytic subunits, in turn exposing _______ on the catalytic subunits.

An example of signaling by direct cell–cell interactions is the?

The citric acid cycle cycle produces ______ NADH, ______ FADH2, ______ ATP, and ______ CO2 molecules from one glucose molecule.

Which of the following plastids is a precursor to all other plastids?

How would mutational inactivation of the nuclear export signal of a protein that normally shuttles back and forth between the nucleus and the cytoplasm affect its subcellular distribution?

Transport of glucose into the intestinal epithelium is driven by ion gradients established by the?

_______ would be expected to block Notch signaling.

Why do actively growing cells have larger nucleoli than resting cells?

The ribosomes of the rough endoplasmic reticulum are targeted to the cytoplasmic side of the membrane via?