Biology the Core

Select the test for glucose

• Benedicts

• iodine

• ethanol

• sudan |||

Select the test for starch

• Benedicts

• Iodine

• Ethanol

• Sudan |||

Select the test for protein

• Benedicts

• Iodine

• Ethanol

• Biuret

Select the test for lipids

• Benedicts

• Iodine

• Sudan |||

• Biuret

What is phenolphthalein?

• An acid

• An alkali solution

• pH indicator

• A neutral solution

What colour is phenolphthalein in alkaline solutions?

• Pink

• Clear

• colourless

• green

What colour is phenolphthalein in acidic solutions?

• Pink

• Colourless

• Green

• Green-blue

Making agar jelly with phenolphthalein and mixed with sodium hydroxide will turn the Agar what colour?

• Colourless

• Pink

• Green

• Green-blue

Tags

NGSS.MS-PS1-2

A phenolphthalein agar cube soaked in sodium hydroxide will make which colour change when left in hydrochloric acid?

• Pink to colourless

• Colourless to pink

By what process does acid move into an agar block?

• Diffusion

• Osmosis

• Active transport