Final answer:
Electron carrier molecules, or metabolic taxi cabs, are compounds that transport high-energy electrons between molecules in biochemical pathways. They play a crucial role in cellular respiration and photosynthesis. Examples include NAD+ and NADH, as well as FAD and FADH2.
Step-by-step explanation:
Electron carrier molecules, also known as metabolic taxi cabs, are compounds that bind and transport high-energy electrons between molecules in biochemical pathways. These molecules are essential for processes such as cellular respiration and photosynthesis, where they accept and pass along energy-carrying electrons in a stepwise manner. Examples of electron carriers include nicotinamide adenine dinucleotide (NAD+ and NADH) and flavin adenine dinucleotide (FAD and FADH2).