Bacteria Growth

At stationary phase:

Death rate = growth rate

• True

• False

Tags

NGSS.HS-LS2-1

NGSS.HS-LS2-6

Cells separate to form 2 daughter cells that are genetically identical.

• True

• False

Tags

NGSS.HS-LS1-4

To prepare 100 ml of 2.5% nutrient broth using the nutrient broth powder provided: 2.5g nutrient broth powder, top up to 100ml with water.

• True

• False

For viable cell count by spread plate method, we should choose the plate with 40 - 400 colonies

• True

• False

When we refer to 'growth' with bacteria, we are talking about the population and not the size of the bacteria.

• False

• True

Tags

NGSS.HS-LS2-6

If the pattern of growth continues, how many bacteria will be in sample B when six hours have elapsed?

• 32

• 64

• 1024

• 2056

What is the optimum pH range for most bacteria to grow?

• 2-4

• 5-7

• 7-9

• 10-12

The reason bacteria don’t take over everything is because they must have the right conditions such as:

• food source

• carbon dioxide

• moisture

• oxygen

• iron

Tags

NGSS.MS-LS2-1

The chemical growth requirements essential for bacterial growth are ...?

• Water,carbon,Nitrogen & sulphur

• Water

• Water,carbon,oxygen,phosphorus,Nitrogen,sulphur and other trace elements

• Environmental waste

Generation time of Escherichia coli is ...

• 20 hours

• 20 days

• 20 minutes

• 20 seconds