Multiple choice

The process in which a molecule is transported into the cell while being chemically altered is called_________.

  1. group translocation

  2. active transport

  3. facilitated diffusion

  4. osmosis

  5. sodium-potassium pumping
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A Correct answer
Explanation

It is a form of active transport across a biomembrane in which the transporting molecule is altered in the course of the transport. This mechanism is utilised by bacteria to transport a compound into their cell by first allowing the compound to bind with protein on the cell surface, followed by altering its chemical structure during its passage across the membrane. The best known group translocation system is the phosphoenolpyruvate sugar phosphotransferase system. It transports a variety of sugars into prokaryotic cells while phosphorylating them using phosphoenolpyruvate as the phosphate donor.

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