Factor affecting microorganisms growth

From the diagram given, what is the observation after three days?

• Test tube 5°C turn to cloudy

• Test tube 37°C remain unchanged

• Test tube 70°C turn to cloudy

• Test tube 37°C turn cloudy

From the diagram given, what is factor affecting the bacteria growth?

• pH

• temperature

• light

• humidity

From the diagram given, what is the inference for the observation ?

• 37°C is the most suitable temperature for the bacteria growth

• 5°C is the most suitable temperature for the bacteria growth

• 70°C is the most suitable temperature for the bacteria growth

• No reason

From the diagram given, what is the optimum temperature for the bacteria growth?

• 37°C

• 5°C

• 70°C

• 60°C

From the diagram given, explain your reason why bacteria become inactive when the temperature is very high?

• High temperature will denature the enzyme in bacteria

• High temperature will help the enzyme function well in bacteria

From the diagram given, explain your reason why bacteria become inactive when the temperature is low?

• Low temperature will cause bacteria become inactive

• Low temperature will cause bacteria become very active

Which temperature will destroy the microorganisms and its spores?

• 121°C

• 5°C

• 70°C

• 37°C

Manipulated variable for this experiment?

• temperature

• nutrient broth

• Bacteria growth

Responding variable for this experiment?

• temperature

• nutrient broth

• Bacteria growth

Constant variable for this experiment?

• Temperature

• Nutrient broth and bacteria

• Bacteria growth