The correct answers are I clearly remember locking the laboratory door this morning. and I must remember to lock the laboratory door when I leave tonight.

Use remember/forget + gerund (-ing) (remember locking, forget meeting) to talk about a memory of a past event.

Use remember/forget + to-infinitive (remember to lock, forget to bring) to talk about a task or duty that needs to be done.

The professor should say "forget meeting" (a past memory) and "forgot to bring" (a failed duty).