BIOLOGY QUIZ COMPETION- TOPAZ

Which part of a plant cell controls the movement of substances into and out of the cell?

• cell membrane

• cell wall

• cytoplasm

• vacuole

The diagram shows the structure of a plant cell. What is a function of this specialised plant cell?

• It absorbs carbon dioxide from the air.

• It absorbs minerals and water from the soil.

• It transports sucrose from leaves.

• It transports water in stems.

When a substance is tested with iodine solution, which colour shows the presence of starch?

• brown

• orange

• blue-black

• blue

Identify the scientist.

[clue: best known for discovering the world's first broadly effective antibiotic 'penicillin"]

• Oswald Avery

• Alexander Fleming

• James Watson

• Francis Crick

GK QUESTION: Our skin, when exposed to excess sunlight, becomes dark. This is because our skin pigments called

• flavoxanthin

• melanin

• carotene

• Xanthophyll