Question

what does pacman help us remember about enzymes?* they consume energy they have a specific shape they can be reused they are always active

Explanation:

Pacman is a game character that eats and can keep doing so (re - used). Enzymes are biological catalysts. Like Pacman, they can be reused in chemical reactions. They bind to substrates (like Pacman "eating" them), convert them to products, and then are free to act on more substrates. Enzymes do not consume energy in the sense of being used up (they lower activation energy). They do have a specific shape (lock - and - key or induced fit model), but the Pacman analogy is more about reusability. Enzymes are not always active; their activity can be regulated (e.g., by inhibitors, co - factors, pH, and temperature).

Answer:

They can be reused