Match each definition with given terms

1. Large family of structurally related, secreted, dimeric proteins that act as hormones and local mediators to control a wide range of biological functions in all animals.	A. Rho
2. Cell-surface receptor in which the cytoplasmic domain either has enzymatic activity itself or is associated with an intracellular enzyme.	B. TOR pathway
3. A crucial signaling protein in the PI-3-kinase–Akt signaling pathway, so named because it is the target of rapamycin.	C. Enzyme-coupled receptor
4. A kinase that is involved in intracellular signaling pathways activated by cell-surface receptors and that phosphorylates inositol phospholipids at the 3 position of the inositol ring.	D. Phosphoinositide 3-kinase
5. A group of monomeric GTPases that regulate both the actin and microtubule cytoskeletons.	E. (TGFβ) superfamily
6. Cytoplasmic tyrosine kinase present at cell–matrix junctions in association with the cytoplasmic tails of integrins.	F. Focal Adhesion Kinase

#Question id: 595

#Unit 1. Molecules and their Interaction Relevant to Biology

It is difficult to determine either Km or Vmax from a graph of velocity vs. substrate concentration because

#Question id: 596

#Unit 1. Molecules and their Interaction Relevant to Biology

The reason to rewrite the Michaelis-Menten equation (such as the Lineweaver-Burk plot) is to

#Question id: 597

#Unit 1. Molecules and their Interaction Relevant to Biology

The Km values for enzyme reactions such as A + B → C + D

#Question id: 598

#Unit 1. Molecules and their Interaction Relevant to Biology

Which might be a method used for distinguishing among several mechanistic possibilities in a multi-substrate reaction?

#Question id: 599

#Unit 1. Molecules and their Interaction Relevant to Biology

In a certain enzyme-catalyzed reaction the following steps occur:

1. A phosphate group on substrate A is transferred to a side chain of an active site residue of the enzyme.

2. The dephosphorylated form of substrate A dissociates from the enzyme.

3. Substrate B enters the active site and is phosphorylated with simultaneous regeneration of the enzyme in its original form.

What kind of kinetic mechanism is described?

#Question id: 600

#Unit 1. Molecules and their Interaction Relevant to Biology

Two substances are used to produce a certain biological product in an enzyme-catalyzed reaction. It is found that both substrates must bind to the enzyme, first one, then the other before the product is produced. This is an example of a/an ________.