Movement of a molecule against a concentration

gradient is
a. simple diffusion.
b. facilitated diffusion.
c. osmosis.
d. active transport.
e. bulk flow.


Answer: d

Biology & Microbiology

You might also like to view...

This simple plant tissue has elongated cells,

living cells with unevenly thick cell walls that function in support. This plant tissue is

a. parenchyma. b. sclerenchyma. c. collenchyma. d. xylem. e. phloem.

Biology & Microbiology

The living, or ________, and nonliving, or ________, components of the environment interact within an ecosystem

Fill in the blank(s) with correct word

Biology & Microbiology

In a given mapping experiment, you expect that incidence of double crossovers is 3.5%, but you only observe 2.5%. This can be explained by ________________

A. Interference B. Linkage C. Coincidence D. Segregation

Biology & Microbiology

In some G-protein-coupled-receptors, cyclic AMP (cAMP) acts as a(n)

1.first messenger. 2.second messenger. 3.effector. 4.protein kinase. 5.extracellular signal.

Biology & Microbiology