Question

What part of the cell surrounds the cytoplasm of the cell and is responsible for controlling traffic going into/out of the cell?

cell (plasma) membrane
nucleus
chloroplasts
mitochondria
What type of passive transport uses transport proteins to move a substance down its concentration gradient?

facilitated diffusion
diffusion
osmosis
active transport
What is the movement of substances in and out of a cell using energy against the concentration gradient?

passive transport
active transport
diffusion
exocytosis

Answer 1

let me handle this

Answer 2

Okay, so we know that chloroplasts are in a plant cells, and the mitochondria is the powerhouse of the cell, and the nucleus is what hold the instructions. This leaves one answer. The cell membrane.
2.) We know that facilitated diffusion picks out what to bring in and what it wants out. Diffusion is mainly recognized for gas moving between to objects.
Osmosis is recognized for liquids diffusing between to objects
Active transport uses energy to diffuse items. Protiens=Energy
3.) Diffusion results in the overall (net) movement of particles from an area of high concentration to an area of low concentration down a concentration gradient. If there is a big concentration difference diffusion will take place more rapidly than if there is only a small concentration difference. The difference in concentration is known as the concentration gradient.

Answer 3

Hopefully this helped you :)