Question 1

Which bacterial cell shape is described as 'really short rod still kind of round'?

Accepted Answer

Coccobacillus

Question 2

A microbiologist observes a sample with cells that vary greatly in both size and shape. What term best describes this phenomenon?

Accepted Answer

Pleomorphic

Question 3

Why can't bacteria undergo mitosis?

Accepted Answer

They lack a nucleus and mitotic spindle apparatus

Question 4

Which of the following best describes binary fission in bacteria?

Accepted Answer

DNA replicates, cytoplasmic membrane elongates, cross wall forms, and two daughter cells separate

Question 5

Which arrangement describes bacteria that are paired together after division?

Accepted Answer

Diplococci

Question 6

A scientist discovers a prokaryote living in a deep-sea vent under extremely high pressure. Which group does this organism most likely belong to?

Accepted Answer

Barophiles

Question 7

Which of the following is NOT a difference between Archaea and Bacteria?

Accepted Answer

Both have peptidoglycan in their cell walls

Question 8

Methanogens are unique among Archaea because they:

Accepted Answer

Produce methane as a metabolic byproduct in anaerobic environments

Question 9

Which environmental condition would most likely support the growth of psychrophilic Archaea?

Accepted Answer

Temperatures below 20°C

Question 10

Modern prokaryotic classification is primarily based on:

Accepted Answer

Taxonomy using rRNA gene sequences

Question 11

Which formula would you use to calculate the number of bacterial cells after $$n$$ generations, starting with $$N_0$$ cells, assuming binary fission?

Accepted Answer

$$N = N_0$ 	imes 2^n$$

Question 12

A sample from a hot spring contains prokaryotes that thrive at temperatures above 45°C. Which group do these organisms most likely belong to?

Accepted Answer

Thermophiles

Question 13

Which of the following statements about bacterial cell division is correct?

Accepted Answer

Bacterial cell division does not involve mitotic spindles

Question 14

Which of the following best explains why some bacterial species form chains or clusters?

Accepted Answer

It is due to the planes in which cells divide and the separation of daughter cells

Question 15

Which of the following Archaea is adapted to live in hypersaline environments?

Accepted Answer

Halophiles

Question 16

A researcher finds prokaryotes that produce antifreeze proteins and thrive in cold environments. Which group do these organisms belong to?

Accepted Answer

Psychrophiles

Question 17

Which of the following is a correct statement about the cell wall of Archaea?

Accepted Answer

Archaea do not have peptidoglycan in their cell walls

Question 18

Which bacterial shape is described as 'slight curve'?

Accepted Answer

Vibrio

Question 19

A prokaryote is found converting $$CO_2$$, $$H_2$$, and organic acids into $$CH_4 in a $$rice paddy. What is its classification?

Accepted Answer

Methanogen

Question 20

Which of the following is the primary reason why Archaea can survive in environments where Bacteria cannot?

Accepted Answer

Unique membrane lipids and cell wall composition

Prokaryotic Cell Morphology, Reproduction, and Classification

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