12 - Passive Transport Across Cell Membrane - Nov 4

Facilitated diffusion involves the use of (a)   to move substances across the cell membrane.

• Transport proteins
• Energy

• Water
• Lipids
• Pumps
• Glucose

What is the primary function of the cell membrane?

• To store lipid energy

• To regulate the movement of molecules in and out of the cell

• To produce proteins

• To store genetic information.

• To provide structure and support to the cell

The cell membrane is composed of a double layer of (a)   .

• Proteins

• Carbohydrates

• Phospholipids
• Nucleic acids

• Triglycerides
• Adenosine Triphosphate

The phospholipid bilayer allows (a)   molecules to pass through easily.

• Large

• Small

• Charged

• Complex

Enzymatic proteins in the membrane catalyze (a)   reactions.

• physical

• chemical

• metabolic

• nuclear

What is the function of glycoproteins in the membrane?

• Provide energy

• Act as enzymes

• Facilitate cell recognition

• Increase fluidity

What is passive transport? SELECT ALL

• Movement of molecules using energy

• Movement of molecules without using energy

• Movement of molecules against concentration gradient

• Movement of molecules with the concentration gradient

• Movement of molecules from an area of low to high concentration

Match the following types of passive transport with their descriptions: Diffusion, Facilitated transport, Osmosis.

• Movement of small molecules- high to low

• Osmosis

• Movement of molecules through a membrane protein.

• Diffusion

• Movement of water molecules

• Facilitated Transport

In passive transport, molecules move from areas of ​ (a)   concentration to areas of (b)   concentration.

• High
• Equal

• None

• high
• Low

Facilitated diffusion is required for (a)   molecules or charged ions.

• smaller

• larger

• neutral

• gaseous