Quiz_1

Which of the following factors influence bacterial growth?

• Temperature, pH, and nutrient availability

• Bacterial growth is not affected by environmental factors.

• Only pH

• Only nutrient availability

True or False: Prokaryotic cells have organelles.

• True

• False

Fill in the blank: Prokaryotic cells are _______ and _____

• Prokaryotic cells are unicellular and simple.

• Prokaryotic cells are multicellular and complex.

• Prokaryotic cells are unicellular and complex.

• Prokaryotic cells are multicellular and simple.

True or False: Gram-positive bacteria have an outer membrane.

• True

• False

Mesophiles have an optimum temperature range of ___ to ___.

• 20°C to 45°C

• 0°C to 20°C

• 45°C to 80°C

• 80°C to 110°C

Facultative anaerobes grow better with ______.

• oxygen

• nitrogen

• carbon dioxide

• hydrogen

Obligate anaerobes have no multiplication in the presence of ______.

• oxygen

• nitrogen

• carbon dioxide

• hydrogen

What is the optimal pH range for neutrophiles ?

• Below 5.5

• Between 5 to 8

• Above 8.5

Alkalophiles grow at pH above which value?

• 5.5

• 7.0

• 8.5

How are the bacteria that require high salt for cell growth named?

• halophiles

• thermophiles

• acidophiles

• methanogens