Micro Quiz 4

What is the shape of bacilli bacteria?

• Spherical

• Rod-shaped

• Spiral

• Filamentous

What is the term for bacteria that are club-shaped?

• Cocci

• Bacilli

• Spirillum

• Club-shaped

What type of bacteria undergoes simple budding?

• Pirella, Blastobacter

• Hyphomicrobium, Rhodomicrobium

• Caulobacter

• Rhodopseudomonas, Nitrobacter

What is the characteristic of polar growth without differentiation of cell size?

• Rhodopseudomonas, Nitrobacter

• Pirella, Blastobacter

• Hyphomicrobium, Rhodomicrobium

• Caulobacter

What is the size of Thiomargarita namibiensis as mentioned in the document?

• 0.2 mm

• 0.4 mm

• 0.6 mm

• 0.8 mm

What is one advantage of a smaller cell size?

• Lower surface-to-volume ratio

• Slower nutrient uptake

• Faster growth

• Lower mutation chance

What is the theoretical borderline diameter for cell size?

• 0.10 µm

• 0.15 µm

• 0.20 µm

• 0.25 µm

Why is a higher surface-to-volume ratio beneficial for cells?

• It decreases nutrient uptake

• It increases nutrient uptake

• It slows down growth

• It reduces mutation chances

What happens to the surface-to-volume ratio as the diameter of a cell increases?

• It increases

• It remains constant

• It decreases

• It fluctuates

What is the surface-to-volume ratio of a cell with a radius of 2 µm?

• 1.5

• 2.5

• 3.5

• 4.5