Question 1

Which of the following is a defining characteristic of organisms in the domain Archaea?

Accepted Answer

Cell membrane lipids have branched hydrocarbon chains

Question 2

Organisms like Clostridium perfringens belong to which phylum?

Accepted Answer

P. Firmicutes

Question 3

Which property distinguishes Gram-negative bacteria from Gram-positive bacteria?

Accepted Answer

Presence of an outer membrane containing lipopolysaccharide (LPS)

Question 4

Which equation best represents the process carried out by methanogenic archaea?

Accepted Answer

$$\mathrm{CO_2$ + 4H_2 \rightarrow CH_4$ + 2H_2O}$$

Question 5

Which of the following is a property of cyanobacteria?

Accepted Answer

Oxygenic photosynthesis using chlorophyll

Question 6

Which class of Proteobacteria is known for nitrogen fixation in association with plant roots?

Accepted Answer

Alphaproteobacteria

Question 7

Which of the following is NOT a method of asexual reproduction in fungi?

Accepted Answer

Zygospores

Question 8

Which property is used to classify bacteria in Bergey’s Manual of Systematic Bacteriology?

Accepted Answer

Cell wall composition and rRNA sequence

Question 9

Which of the following is a characteristic of protozoa in the phylum Parabasala?

Accepted Answer

Presence of a parabasal body

Question 10

Which equation describes the conversion performed by nitrifying bacteria?

Accepted Answer

$$\mathrm{NH_3$ \rightarrow NO_3$^-}$$

Question 11

Which of the following is a defining feature of the phylum Nematoda?

Accepted Answer

Pseudocoelomate body plan

Question 12

Which property is unique to the phylum Platyhelminthes (flatworms)?

Accepted Answer

Flat, macroscopic, multicellular body

Question 13

Which of the following is a characteristic of fungi in the division Ascomycota?

Accepted Answer

Production of ascospores within an ascus

Question 14

Which of the following is a property of lichens?

Accepted Answer

They are classified based on vegetative growth form (e.g., foliose, fruticose, crustose)

Question 15

Which of the following is a property of the phylum Actinobacteria?

Accepted Answer

High G+C content

Question 16

Which of the following is a property of the class Clostridia?

Accepted Answer

Obligate anaerobes capable of endospore formation

Question 17

Which of the following is a property of the phylum Basidiomycota?

Accepted Answer

Production of basidiospores on a basidium

Question 18

Which of the following is a property of the phylum Tenericutes?

Accepted Answer

Absence of cell wall

Question 19

Which of the following is a property of the phylum Proteobacteria?

Accepted Answer

Gram-negative cell envelope

Question 20

Which of the following is a property of the phylum Cyanobacteria?

Accepted Answer

Oxygenic photosynthesis and nitrogen fixation

Classification and Taxonomy of Microorganisms: Prokaryotes, Eukaryotes, and Their Properties

Study Guide - Practice Questions