Which observation would support the idea that bile emulsification increases lipase activity?

Which observation would support the idea that bile emulsification increases lipase activity?

• A. Smaller lipid droplet size due to detergent action
• B. Larger droplets forming
• C. No change in droplet size
• D. Decreased enzyme solubility

Answer: (A)

Bile emulsification increases lipase activity by boosting the surface area of fat droplets, giving the enzyme more interface to act on. Bile salts act as emulsifiers, breaking large fat globules into many tiny droplets. Lipase does its work at the oil–water interface, so more surface area means more substrate exposed per unit time and faster hydrolysis of triglycerides into fatty acids and monoglycerides. If droplets remained large or showed no change, surface area would stay limited, slowing the reaction. If the enzyme became less soluble, it wouldn’t be as available to act on the substrate. Thus, observing smaller lipid droplets due to emulsification aligns with increased lipase activity.

Bile emulsification increases lipase activity by boosting the surface area of fat droplets, giving the enzyme more interface to act on. Bile salts act as emulsifiers, breaking large fat globules into many tiny droplets. Lipase does its work at the oil–water interface, so more surface area means more substrate exposed per unit time and faster hydrolysis of triglycerides into fatty acids and monoglycerides. If droplets remained large or showed no change, surface area would stay limited, slowing the reaction. If the enzyme became less soluble, it wouldn’t be as available to act on the substrate. Thus, observing smaller lipid droplets due to emulsification aligns with increased lipase activity.