Membrane Proteins & Transport

Which statement best describes the cell membrane?

• The protective outer layer that controls what enters and leaves the cell.
  
• Stores information on DNA molecules / Directs and controls the activities of the cell.
  
• A folded membrane that moves materials around inside cells / Also acts as the site of manufacturing materials needed by the cell.
  
• The smallest organelle with a huge job / Makes proteins, which are the building blocks of the body.
  

Tags

NGSS.MS-LS1-2

What is NOT TRUE about the cell membrane?

• It controls what enters and leaves the cell
• Semipermeable
• Phospholipid bilayer
• Contains digestive enzymes

Tags

NGSS.MS-LS1-2

What does “high concentration area” mean?

• Spread out
• Tightly packed together
• Uncrowded
• Spacious

When particles move from areas of high concentration to areas less concentrated, this has taken place.

• diffusion
• mitosis
• endocytosis
• photosynthesis

Tags

NGSS.MS-LS2-3

What process occurs when WATER diffuses across a membrane?

• endocytosis
• mitosis
• osmosis
• nuclear fission 

Plasma membrane .....

• is selectively permeable

• consist of triglyceride and cholesterol

• separate cytoplasm and extracellular fluid

• have proteins embedded the phospholipid bilayer

Name structure P

(a)  

Tags

NGSS.HS-LS1-6

Choose correct statement(s) about structure R

• makes membrane less fluid by restrain phospholipid movement

• lower the temperature required for mombrane to solidify

• is a type of lipid

• can be found higher in plant compared to animals

Assuming the membrane is only permeable to water. What happens to slution level in SIDE B after 20 minutes?

• increase

• decrease

• no change

Identify suitable stimulus to open ion gated channel in the figure.

• Voltage

• Mechanical

• Chemical

• Enzyme