The role of NAD+ during cell respiration is to ________. a. accept electrons and act as an "electron holder" during cell respiration b. donate electrons to the electron transport chain c. act as an electron acceptor during photosynthesis

### a. accept electrons and act as an "electron holder" during cell respiration

## Step1: Understanding the role of NAD+ in cell respiration### NAD+ (Nicotinamide adenine dinucleotide) is a coenzyme found in all living cells. It plays a crucial role in the process of cell respiration, specifically in the Krebs cycle and the electron transport chain. NAD+ accepts electrons during these processes, acting as an "electron holder".## Step2: Evaluating the options### Option b suggests that NAD+ donates electrons to the electron transport chain. This is incorrect because NAD+ accepts, not donates, electrons. Option c suggests that NAD+ acts as an electron acceptor during photosynthesis. This is also incorrect because NAD+ is involved in cell respiration, not photosynthesis.