Starch - OLABS

What color does iodine turn when it is in the presence of starch?

Blue-black

Out of the following, which one is a simple carbohydrate?

Glucose

Which is an example of a monosaccharide?

Glucose

What is an animal polysaccharide, which is a storage form of glucose, and provides a rapid release of energy when needed by the body?

Glycogen

What is the storage form of carbohydrate in animals?

Glycogen

To observe starch granules in potato under a microscope, freshly cut surface of potato was placed on a slide. The stain that will show starch granules clearly is ___.

Iodine solution

While doing an experiment with a potato, a student accidently dropped a liquid on it, which made the potato slice blue-black. What liquid was dropped?

Iodine solution

The colour of starch solution is:

Milky white

What are compounds composed of many monosaccharides linked together called?

Polysaccharides

Which food contains starch?

Potato

Arun added few drops of iodine solution to three test tubes A, B and C containing food samples. A blue-black colour appeared on the test tube A and C. What was the correct order of the food samples in the test tubes?

Rice, dal, potato.

Paul was rushing with a bottle of tincture iodine. Some iodine solution splashed on his yellow coloured cotton shirt and also on the white table cloth. The stain on the table cloth was yellowish brown while that on his shirt was blue-black. What is the most plausible scientific reason for this?

Shirt was starched after washing.

A food sample turned blue-black after addition of a few drops of iodine solution. What does this sample contain?

Starch

In which form is carbohydrate stored in plants?

Starch

Rice, bread, potatoes and pasta are examples of which type of food?

Starch foods

Iodine reacts with starch to form __________________complex which gives blue black colour.

Starch-iodine

_________________ is formed by combining a fructose unit and a glucose unit.

Sucrose