ATI RN
Cells and Tissues Questions and Answers Questions
Question 1 of 5
The plasma membrane of a cell contains molecules that have a hydrophobic end and a hydrophilic end What are they called?
Correct Answer: A
Rationale: The phosphate end is hydrophilic(water soluble) while the lipid end is hydrophobic(insoluble in water).
Question 2 of 5
Facilitated diffusion differs from active transport because facilitated diffusion:
Correct Answer: C
Rationale: Diffusion always refers to movement from high to low concentration(without energy expenditure). Facilitated refers to the assistance provided by a transport molecule that is designed for the purpose.
Question 3 of 5
What is the name given to the type of transport where glucose or an amino acid binds to a receptor protein on the plasma membrane, which then moves the molecule into the cell without the expenditure of energy?
Correct Answer: A
Rationale: The membrane protein facilitates the entry into the cell. No energy is expended so it is not active transport.
Question 4 of 5
What is the major component of the plasma membrane of a cell?
Correct Answer: A
Rationale: Cholesterol and proteins are also present in the plasma membrane but as more minor components.
Question 5 of 5
In a cell cycle which phase takes the longest time to complete:
Correct Answer: B
Rationale: Interphase is the time when the cell is performing its normal function and not dividing.