BackActive Transport quiz #2
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1/30BackSkip to main contentBackWhat is an example of active transport?
Sodium-potassium pump Which of these is an example of active transport? A) Simple diffusion B) Sodium-potassium pump C) Osmosis D) Facilitated diffusion
B) Sodium-potassium pump What type of cellular transport requires a cell to use energy?
Active transport Which transport mechanisms are classified as active mechanisms? A) Diffusion and osmosis B) Facilitated diffusion and osmosis C) Primary active transport and secondary active transport D) Endocytosis and exocytosis
C) Primary active transport and secondary active transport What is a form of active transport?
Sodium-potassium pump What are the two types of active transport?
Primary active transport and secondary active transport Which type of transport requires energy?
Active transport What is not a characteristic of active transport?
Moves molecules along their concentration gradient Which is an active transport process? A) Diffusion B) Osmosis C) Sodium-potassium pump D) Facilitated diffusion
C) Sodium-potassium pump Which membrane activity requires energy from ATP hydrolysis?
Sodium-potassium pump What are two key characteristics of active transport?
Moves molecules against their concentration gradient; Utilizes ATP Does active transport require energy?
It requires energy Which energy transformation occurs during active transport in a cell?
Chemical energy from ATP is transformed into mechanical energy to move molecules against their concentration gradient. Which statement best describes active transport?
Active transport is the movement of molecules against their concentration gradient, requiring energy, often in the form of ATP. Which type of movement across a cell's plasma membrane requires energy supplied by ATP?
Active transport Which process moves an ion across a cell membrane against the concentration gradient?
Active transport What type of molecules are transported by molecular pumps?
Ions such as sodium and potassium What is an example of active transport?
Sodium-potassium pump What powers the active transport process?
ATP hydrolysis What is an example of active transport through a cell membrane?
Sodium-potassium pump Which process uses proteins to move molecules against a concentration gradient?
Active transport What are examples of active transport?
Sodium-potassium pump and glucose transport Does active transport require energy?
Yes, active transport requires energy. Which type of transport moves molecules against the concentration gradient?
Active transport What is true regarding active transport?
It requires energy Which type of cellular transport requires a cell to use energy?
Active transport What is active transport and why does it require energy?
Active transport is the movement of molecules across a membrane against their concentration gradient, from low to high concentration, and it requires energy because this process is not energetically favorable. Describe the function of the sodium-potassium pump in primary active transport.
The sodium-potassium pump moves 3 sodium ions out of the cell and 2 potassium ions into the cell, both against their concentration gradients, using energy directly from ATP hydrolysis. Explain how secondary active transport uses the sodium gradient to transport glucose.
Secondary active transport uses the energy from sodium ions moving down their concentration gradient (created by primary active transport) to drive the transport of glucose against its concentration gradient into the cell. What is the main difference in the energy source between primary and secondary active transport?
Primary active transport uses ATP directly as its energy source, while secondary active transport uses the energy stored in the concentration gradient of another molecule.
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