Which of the following is a key function carried out by membrane proteins?

• A. Transporting molecules across the membrane
• B. Generating ATP
• C. Synthesizing lipids
• D. Storing genetic information

Answer: (A)

Verified step by step guidance

1. Understand the role of membrane proteins: Membrane proteins are integral to the function of biological membranes, serving various roles such as transport, signaling, and structural support.
2. Identify the key functions of membrane proteins: Membrane proteins can facilitate the transport of molecules across the membrane, act as receptors for signal transduction, and provide structural support to the cell membrane.
3. Focus on transport: Transporting molecules across the membrane is a primary function of membrane proteins. This includes channels and carriers that allow specific molecules to pass through the membrane.
4. Differentiate from other functions: Generating ATP, synthesizing lipids, and storing genetic information are not primary functions of membrane proteins. ATP generation is typically associated with mitochondria, lipid synthesis with the endoplasmic reticulum, and genetic information storage with the nucleus.
5. Conclude with the correct function: Based on the understanding of membrane protein roles, transporting molecules across the membrane is the key function carried out by membrane proteins.