Photosynthesis and Variegated Leaves Quiz

What pigment is responsible for the green color in most plant leaves?

• Anthocyanin

• Chlorophyll

• Xanthophyll

• Carotene

What are the reactants in the photosynthesis equation?

• Starch and Iodine

• Carbon Dioxide and Water

• Chlorophyll and Sunlight

• Glucose and Oxygen

Why is glucose converted to starch in plants?

• Starch is insoluble and can be stored

• Glucose is insoluble and cannot be stored

• Glucose is toxic to plant cells

• Starch is soluble and can be easily transported

What is the first step in the practical experiment to test for starch in leaves?

• Add iodine to the leaf

• Boil the leaf in water

• Dry the leaf on a white tile

• Place the leaf in ethanol

Why is it important to turn off the Bunsen burner before using ethanol?

• Ethanol is toxic

• Ethanol reacts with water

• Ethanol is flammable

• Ethanol evaporates quickly

What is the purpose of adding iodine to the leaf in the experiment?

• To dissolve the leaf

• To test for the presence of starch

• To soften the leaf

• To remove chlorophyll

What color does iodine turn in the presence of starch?

• Black

• Green

• Orange

• Blue

Why do the white areas of a variegated leaf turn orange with iodine?

• They are absorbing iodine

• They contain chlorophyll

• They do not contain starch

• They are photosynthesizing

What does the presence of black color in the leaf indicate?

• Presence of starch

• Absence of chlorophyll

• Absence of starch

• Presence of chlorophyll

What is the main reason the green parts of the leaf turn black in the experiment?

• They contain starch

• They lack chlorophyll

• They are not photosynthesizing

• They are absorbing water