You find a new organic molecule that is water soluble and contains the elements carbon, nitrogen, hydrogen, and oxygen. It is probably a 

A. protein.
B. fat.
C. carbohydrate.
D. phospholipid.


A. protein.

Biology & Microbiology

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Which of the following is not one of the functions of the cytoskeleton?

a. To provide a structural framework for the cell b. Cell locomotion c. Protein translocation into the ER d. Intracellular movement of organelles and other structures

Biology & Microbiology

The connection between structure and ________ is a basic concept of biology

A) species B) adaptation C) function D) sex

Biology & Microbiology

Na+ ion concentrations are higher outside the cell than inside the cell. What type of transport system is required to move Na+ ions in and out of the cell?

A. Na+ moves into the cell by facilitated diffusion and can not move out of the cell B. Na+ moves in and out of the cell by active transport C. Na+ moves into the cell by facilitated diffusion and out of the cell by active transport D. Na+ moves in and out of the cell by passive diffusion E. Na+ moves into the cell by active transport and out of the cell by facilitated diffusion

Biology & Microbiology

Refer to Figure 7-2. The line on the graph labeled B represents the:


a. activation energy with an enzyme.
b. activation energy without an enzyme.
c. free energy of the reactants.
d. change in entropy.
e. change in enthalpy

Biology & Microbiology