3.1.6 Biotechnology 1

Question 1

What is biotechnology?

Answer 1

The the of microorganisms to create useful products.

Question 2

What is yeast?

Answer 2

A type of microorganism (fungi)

Question 3

Yeast is used in the production of which products?

Answer 3

Bread
Beer
Wine

Question 4

What is aerobic respiration?

Answer 4

The production of energy from glucose and oxygen

Question 5

What is anaerobic respiration?

Answer 5

The production of energy from glucose without oxygen

Question 6

The version of anaerobic respiration that yeast do has a special name. We call it…

Answer 6

fermentation

Question 7

What is the equation for fermentation by yeast?

Answer 7

Glucose –> ethanol + carbon dioxide + energy

Question 8

Describe how to make bread

Answer 8

1. Mix flour, water and yeast to make dough.
2. Leave dough in a warm place to ruse.
3. The yeast do anaerobic respiration and release carbon dioxide and ethanol.
4. The ethanol evapourates, the carbon dioxide leaves bubbles in the bread dough.

Question 9

Which type of sugar is used to make wine?

Answer 9

Grape sugar

Question 10

Which type of sugar is used to make beer?

Answer 10

Malted barley suagr

Question 11

Describe the process of brewing beer

Answer 11

1. Add malted barely sugar to a container.
2. Add yeast to ferment the sugar into ethanol (alcohol)
3. Seal container to keep out oxygen.
4. When sugar has fully fermented remove waste bits.
5. Pour the liquid beer into barrels.

Question 12

ethanol is a type of…

Answer 12

alcohol