Multiple Choice
Which energy transformation occurs during active transport in a cell?
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6. The Membrane
Active Transport
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What type of molecules are typically transported by molecular pumps during active transport?
A
Lipids
B
Large proteins
C
Simple sugars
D
Ions
Verified step by step guidance1
Understand the concept of active transport: Active transport is the movement of molecules across a cell membrane from a region of lower concentration to a region of higher concentration, using energy in the form of ATP.
Identify the role of molecular pumps: Molecular pumps are proteins embedded in the cell membrane that facilitate active transport by moving specific molecules against their concentration gradient.
Recognize the types of molecules typically transported: Molecular pumps are often involved in the transport of ions, such as sodium (Na+), potassium (K+), calcium (Ca2+), and hydrogen (H+) ions.
Differentiate between the options: Lipids and large proteins are generally not transported by molecular pumps during active transport. Simple sugars are usually transported by facilitated diffusion or secondary active transport, not directly by molecular pumps.
Conclude with the correct type of molecule: Ions are the typical molecules transported by molecular pumps during active transport, as they require energy to move against their concentration gradients.
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