Question

1.
...... solution is used to test the presence of starch in food.

2.
...... gas is obtained during photosynthesis.

3.
fats are digested by .......​

Answer 1

Answer:

1 iodine solution

2 oxygen

3 lipase

Answer 2

1  iodine solution

Explaination:

A chemical test for starch is to add iodine solution (yellow/brown) and look for a colour change. In the presence of starch, iodine turns a blue/black colour. It is possible to distinguish starch from glucose (and other carbohydrates) using this iodine solution test.

2  oxygen

3 Fats are digested by lipases that hydrolyze the glycerol fatty acid bonds. Bile salts emulsify the fats to allow for their solution as micelles in the chyme and to increase the surface area for the pancreatic lipases to operate.