Exam 2: Molecular Interactions

Ions with a positive charge are called

A(n)________ is any molecule or ion that binds to another molecule.

Van der Waals forces are weak attractive forces between the nucleus of one atom and the electrons of another atom close by.

Explain the polar character of an ammonia molecule (NH₃).What is the cause of the partial charges? What is the overall charge for NH₃?

When glucose enters a cell it is phosphorylated in order to maintain a low glucose concentration in the cell.The enzyme that phosphorylates glucose would be what kind of modulator?

Solutions are formed with water and ________ solutes which dissolve in them.

Stanley Miller set out to demonstrate an explanation for the origins of organic molecules using a combination of simple organic molecules, heat and periodic bursts of electricity through the mixture, ultimately producing which kind of molecules?

Which of the following would be considered an allosteric modulator?

If the dissociation constant of a protein is less than one (Kd < 1), what can you conclude about the affinity of the protein for the ligand?

Nucleic acids are polymers of units called

A blood pH of less than 7.00 and greater than 7.70 is incompatible with life.

When a nitrogenous base is bonded to a pentose sugar and a phosphate, a ________ is formed.

These are weak attractive forces that are responsible for the surface tension of water.

A positively-charged ion is called a(n)

Glycoprotein molecules

If a reaction which is stopped by substance X can recover when a lot more of the native activator is supplied, substance X would be considered which of the following?

The organic molecules known as phospholipids are key components of cell membranes and composed of which molecules?

The fuel molecule cells use to run all their activities is

If 100 mL of water contains 5 grams of NaCl, molecular mass = 58.5 Daltons, what is the molarity of the solution in moles/L?

While every level of a protein's structure is important to the function of that protein, which level of structure is most important to the function of enzymes, and why?