Chemotaxis refers to the ability to
A. move in response to light.
B. move in response to a chemical.
C. not move in response to a chemical.
D. transport desired molecules into cell.
E. None of the choices is correct.
Ans: B. move in response to a chemical.
You might also like to view...
Each new DNA strand starts at an ______ synthesized by ______
Fill in the blank(s) with the appropriate word(s).
The placenta
A. conducts the mother's blood directly to the embryo. B. is responsible for providing the nutritional needs of the embryo. C. nourishes the egg while it is yet in the ovary. D. is discharged from the body and rebuilt approximately every twenty-eight days.
When light energy hits a photopigment, the molecule
A) is separated from the plasma membrane. B) is destroyed, setting off a series of chemical reactions. C) forms an enzyme. D) changes shape, setting off a series of chemical reactions. E) generates an action potential.
What is the fundamental concept that causes gel electrophoresis to work?
A. Different proteins have different charges and sizes. B. Different proteins respond differently to dyes in a gel electrophoresis. C. Some proteins are enzymes and will react with molecules in the gel. D. All proteins have the same charge and will move through the gel at the same speed. E. All proteins will react with a dye to produce a band.