Photosynthesis PostLess - Starch Test

Which reagent is used to test for the presence of starch?

• Ethanol

• Iodine solution

• Benedict's Reagent

• Biuret Reagent

What is the colour of iodine solution?

• Blue black

• Purple

• Yellowish-brown

• Colourless

What colour change is seen in a positive starch test?

• From blue black to colourless

• From yellow brown to colourless

• From blue black to yellow brown

• From yellow brown to blue black

What is starch?

• Complex carbohydrate made up of long chains of glucose molecules

• Complex protein made up of long chains of amino acids

• Complex carbohydrate made up of long chains of sucrose molecules

• Complex carbohydrate made up of long chains of glycerol molecules

TRUE or FALSE: Rice contains complex carbohydrates.

• True

• False

If the food sample does not contain starch, what color change will be seen?

• Brown --> Bluish Black

• Brown --> Green

• Blue --> Brick Red

• No color change will be seen

Where is chlorophyll found in plant cells?

• cytoplasm

• chloroplast

• mitochondria

• vacuole

What substance can glucose be converted into, which is the energy storage carbohydrate of plants?

• cellulose

• sucrose

• amino acids

• starch

Why do plants conduct photosynthesis?

• To make light
• To make mitochondria
• To make glucose
• To release carbon dioxide

What are the examples of food that contain starch?

• Potatoes

• Apple
• Bread

• Broccoli
• Rice