Cell Membrane and Transport

What is diffusion?

• when molecules stay in one place

• when molecules move from a high concentration to a low.

• no movement 

• molecules move everywhere

If the molecules in the picture are glucose molecules what type of transport is being shown in the picture?

• osmosis

• isotonic

• diffusion

• active transport

Tags

NGSS.MS-LS2-3

Osmosis is the movement of _____ across a membrane.

• food

• energy

• oxygen

• water

What does "bilayer" mean in the term lipid bilayer?

• one layer

• two layers

• laminated

• bilateral

Most of the cell membrane is made of...

• Lipids

• Carbohydrates

• Proteins

• Nucleic acids

Solutes move with the concentration gradient, therefore no energy is used. 

• Passive Transport

• Active Transport

Active transport requires ______, moves materials from __________________, and goes _______ the concentration gradient.

• No energy, low to high, against

• ATP, high to low, with

• ATP, low to high, with

• ATP, low to high, against

What organelle of the cell produces the energy needed for active transport?

• Mitochondria 

• Golgi Body 

• Vesicle 

• Vacuole 

Tags

NGSS.HS-LS1-7

The right hand side of the pictures shows the molecules at

Answer explanation

The molecules are equally distributed throughout the area so the molecules are at equilibrium.

Draw the molecules that would be on the right side of this cell after it was allowed to sit for 20 minutes.

Answer explanation

The large circles would still all be on the left side as starch is too big to diffuse. There would be even amounts of glucose on each side.

Tags

NGSS.MS-LS1-2

NGSS.MS-LS1-7