Enzyme Function and Activity Concepts

The video tutorial covers Lab 7 on digestive enzymes, explaining their role as catalysts in the body. It discusses how enzymes lower activation energy, the lock and key model, and the induced fit model. The naming conventions of enzymes and the concept of isoenzymes are introduced. Factors affecting enzyme activity, such as temperature and pH, are explored, along with enzyme activation and saturation. The video concludes with a summary of the digestive process and instructions for the lab report.

What is the primary role of enzymes in the body?

• To change the nature of chemical reactions

• To act as biological catalysts

• To permanently alter reactants

• To increase the activation energy required

How do enzymes lower the activation energy of a reaction?

• By increasing the temperature

• By altering the products

• By changing the reactants

• By providing an alternative pathway

Which model describes the initial interaction between an enzyme and its substrate?

• Enzyme-product model

• Lock and key model

• Induced fit model

• Substrate complex model

What is an isoenzyme?

• An enzyme that functions in multiple reactions

• An enzyme with a different name in each organ

• An enzyme that performs the same function in different organs

• An enzyme that changes its structure

What suffix is commonly found at the end of enzyme names?

• -ase

• -ose

• -ine

• -ate

What happens to an enzyme when it becomes denatured?

• It binds more substrates

• It becomes more active

• It speeds up reactions

• It loses its structure and function

Which factor does NOT affect enzyme activity?

• Color of the enzyme

• Substrate concentration

• pH

• Temperature

What is the role of co-enzymes in enzyme activity?

• To inhibit enzyme activity

• To change the enzyme's structure

• To provide energy for reactions

• To assist in enzyme-substrate binding

What occurs when an enzyme is saturated?

• The enzyme stops functioning

• The enzyme changes its shape

• All active sites are filled with substrate

• The reaction rate decreases

How are enzymes activated in the digestive system?

• By being produced in an inactive form and then activated

• By changing pH levels

• By being produced in an active form

• By increasing temperature