Final answer:
It is true that all laboratory procedures should be thoroughly read and understood before commencing work, to ensure safety around potential carcinogens, biohazards, and toxins.
Step-by-step explanation:
It is true that you should read all procedures thoroughly before entering the laboratory. Safety is paramount when conducting scientific research due to the presence of carcinogens, biohazards, and toxins. Adhering to safety guidelines, following directions carefully, and having a comprehensive understanding of all laboratory procedures ensure a safe and efficient research environment. This practice prevents accidents and mistakes that could compromise the success of an experiment or cause harm to the individuals involved. Remember, in a lab setting, being prepared is as important as the experiment itself.