Standard Science Primary 4 Systems

Which of the following occurs in the mouth during digestion?

A Food is absorbed into the blood.
B Digestive juices start to break down starch.
C Water is absorbed from the food.
D Acid kills bacteria in the food.
Show Worked Solution

Worked Solution

Step 1: Chewing breaks food into smaller pieces. Step [2-9]: Saliva contains digestive juices that begin the chemical breakdown of starch into simpler sugars.

Correct answer: Digestive juices start to break down starch.

Want more questions like this? Superholic Lab has 10,000+ MOE-aligned questions with full worked solutions.

Start Free Trial — 7 Days Free