A transport protein moves a molecule across the cell membrane against its concentration gradient. This is an example of (a) diffusion. (b) facilitated diffusion. (c) active transport. (d)endocytosis....

A transport protein moves a molecule across the cell membrane against its concentration gradient. This is an example of

(a) diffusion.

(b) facilitated diffusion.

(c) active transport.

(d)endocytosis.

During which stage of the cell cycle does a cell duplicate its genetic material?

(a) gap 1

(b) gap 2

(c) synthesis

(d) mitosis and cytokinesis