Biological Concepts and Enzyme Functions

The video tutorial covers the importance of using scientific terminology, focusing on enzymes as biological catalysts, metabolism, and metabolic efficiency. It explains homeostasis, stimulus response, and thermoregulation in organisms, emphasizing the need for maintaining optimum conditions for enzyme activity.

Why is it important to use correct scientific terminology in exams?

• It helps in gaining extra marks.

• It confuses the examiner.

• It is not important at all.

• It makes the exam longer.

What role do enzymes play in chemical reactions?

• They have no role in reactions.

• They slow down reactions.

• They act as biological catalysts.

• They stop reactions completely.

What is the function of the active site in an enzyme?

• It is where the enzyme is created.

• It is where the enzyme is destroyed.

• It is where substrates bind.

• It is where the enzyme is stored.

What does metabolism refer to?

• All chemical reactions in the body.

• The breakdown of food only.

• The process of breathing.

• The circulation of blood.

What happens to enzymes when they are denatured?

• They multiply rapidly.

• They change shape and lose function.

• They become more efficient.

• They become more acidic.

What does a low pH indicate about a substance?

• It is non-reactive.

• It is neutral.

• It is very acidic.

• It is very basic.

What is homeostasis?

• The process of growing.

• Maintaining a constant internal environment.

• The process of digestion.

• The process of photosynthesis.

What is the role of the nervous system in maintaining balance?

• It detects changes and helps restore balance.

• It creates new stimuli.

• It decreases blood pressure.

• It increases body temperature.

What is the difference between ectotherms and endotherms?

• Ectotherms regulate their internal temperature.

• Endotherms rely on external temperatures.

• Endotherms cannot regulate their internal temperature.

• Ectotherms rely on external temperatures.

What is thermoregulation?

• The process of maintaining body temperature.

• The process of reducing body weight.

• The process of increasing blood sugar.

• The process of increasing body size.