Purchase Solution

Active transport

Not what you're looking for?

Ask Custom Question

Active transport is the

A) diffusion of molecules within a cell

B) movement of molecules into or out of a cell against a concentration gradient

C) movement of molecules into or out of a cell down a concentration gradient

D) movement of molecules into or out of a cell using special proteins and not requiring an expenditure of energy.

E) rapid movement of molecules in a solution

Purchase this Solution

Solution Preview

Hello and thank you for posting your question to Brainmass

Active transport is the motion of a molecule against the chemical or electrostatic gradient. such a movement always requires ...

Purchase this Solution


Free BrainMass Quizzes
Parts of the Brain

This quiz will test your knowledge on different areas of the brain.

Breastfeeding Basics

How much do you know about breastfeeding? Find out with this quiz!

Bacterial Genetics

This quiz test your knowledge of the genetics of bacteria.

Basic Immunology Quiz

Intro to immuno quiz. Covers the basics of immunology and recognition of foreign substances by the body.

Cellular Respiration

This quiz is a review for cellular respiration.