9/10 Cell membrane and transport 24-25

Multiple Choice

Which type of biological macromolecule is the main component of the plasma membrane?

• carbohydrate

• lipid

• protein

• nucleic acid

Multiple Choice

Define plasma membrane

• lipid that helps minimize effects of temperature

• only on the outer surface of the plasma membrane and are attached to proteins or lipids; form distinctive cellular markers

• flexible boundary of a cell that separates a cell from its surroundings

• may extend partway into the plasma membrane, cross the membrane entirely, or be loosely attached to its inside or outside face

Multiple Choice

What forms the channels and pumps in the phospholipid bilayer?

• carbohydrates
• proteins
• hydrophilic heads 
• lipids

Multiple Choice

What is a substance called if it speeds up a chemical reaction?

• reusable
• catalyst
• specific
• fragile

Multiple Choice

Enzymes are an example of

• Lipids

• Carbohydrate

• Protein

• Nucleic Acid

Multiple Choice

Each enzyme only has 1 substrate that will fit its active site.  What is this called?

• reusable
• catalyst
• specific
• fragile

Multiple Choice

which of the following terms means the movement of water from high concentration to low concentration

• diffusion
• facilitated diffusion

• osmosis
• exocytosis

Multiple Choice

Which transport does not require energy?

• Passive
• Active 

Multiple Choice

What type of transport is facilitated diffusion?

• Passive Transport
• Active Transport

Match

Match the following processes to the illustration:

Diffusion

facilitated diffusion

osmosis

• Diffusion

• facilitated diffusion

• osmosis

Multiple Choice

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

• Passive Transport
• Active Transport

Multiple Choice

Movement of particles from high to low concentration. 

• Passive Transport
• Active Transport

Multiple Choice

What is a solute?

• The substance that does the dissolving in a solution.
• The substance that is dissolved into the solution.
• The mixing of different substances.
• The process in which neutral molecules lose or gain electrons

Multiple Choice

Osmosis is a form of ______________. 

• Passive Transport
• Active Transport

Multiple Choice

What is diffusion?

• when molecules move 
• when molecules move from a high concentration to a low.
• no movement 
• molecules move everywhere

Multiple Choice

When there is the same solute concentration inside the cell as there is outside the cell, that is an ________ solution.

• isotonic
• Hypotonic

• Hypertonic

Multiple Choice

In this situation, where the solute is illustrated by red dots, predict if will WATER move into or out of the cell, and how that will affect the cell.

• Water will move into the cell and the cell will expand.
• Water will move into the cell and the cell will shrink.
• Water will move out of the cell and the cell will expand.
• Water will move out of the cell and the cell will shrink.

Multiple Choice

The cell shows water moving in and out equally, which means it was placed in a ___ solution.

• Isotonic

• Hypertonic

• Hypotonic