The effect of pH on the rate of an enzyme reaction: practical | Exit Quiz | Oak National Academy

Which piece of equipment would you use in this practical to heat the test tubes of starch and amylase to a specific temperature?

• water bath

• Bunsen burner

• autoclave

• hot plate

• microwave

Answer explanation

Water baths are used to heat chemicals up to chosen temperatures. The chemicals are placed in test tubes and the test tubes are placed into a rack in the water bath.

What is collecting data at accurately timed intervals know as?

• random sampling

• occasional sampling

• continuous sampling

Answer explanation

Continuous sampling involves taking sampling at regular defined intervals.

What is formed when amylase digests starch?

• maltose

• proteins

• lipids

• amino acids

Answer explanation

Starch is broken down into maltose that is a disaccharide (type of sugar).

What is this piece of equipment called?

Answer explanation

Pipettes are used to take small liquid samples. They work by squeezing the top and then releasing it, which draws the liquid into the pipette.

Iodine solution is an irritant. What piece of safety equipment should be warn when using it?

Answer explanation

Safety glasses or goggles should be worn when using chemicals in the lab.

What is this piece of equipment used for?

• mixing liquids

• measuring liquids

• sampling

Answer explanation

Measuring cylinders are used to accurately measure out volumes of liquid.