Which of the following types of membrane transport modifies a chemical as it is transported into the cell?

• A. Facilitated Diffusion.
• B. Simple Diffusion.
• C. Modified Transport.
• D. Group Translocation.
• E. Secondary Active Transport.

Answer: (D)

Verified step by step guidance

1. Understand the concept of membrane transport: Membrane transport refers to the movement of substances across the cell membrane. It can be passive (not requiring energy) or active (requiring energy).
2. Identify the types of membrane transport: The problem lists several types of transport, including facilitated diffusion, simple diffusion, modified transport, group translocation, and secondary active transport.
3. Differentiate between passive and active transport: Facilitated diffusion and simple diffusion are passive processes, meaning they do not require energy and do not modify the chemical structure of the transported substance.
4. Explore the concept of group translocation: Group translocation is a type of active transport where the substance is chemically modified during its passage across the membrane. This process is common in prokaryotes, such as bacteria, where sugars are phosphorylated as they are transported into the cell.
5. Conclude with the correct identification: Based on the understanding that group translocation involves chemical modification of the transported substance, recognize that this is the correct answer to the problem.