Please answer all questions! Only answer if you know! Thank you. 1) Pleomorphic
ID: 83717 • Letter: P
Question
Please answer all questions! Only answer if you know! Thank you.
1) Pleomorphic bacteria
A) have a slightly curved rod shape.
B) are flexible.
C) reproduce by snapping division.
D) are roughly spherical.
E) vary in size and shape.
2) Which of the following bacterial arrangements is the result of snapping division?
A) tetrads
B) palisades
C) strepto-
D) sarcinae
E) staphylo-
4) What bacterial structure is responsible for separating the daughter DNA molecules after replication?
A) cross wall
B) cytoplasmic membrane
C) fimbria
D) spindle
E) cytoskeleton
5) Endospores
A) are bacterial reproductive structures.
B) can be produced when nutrients are scarce.
C) are produced by bacteria, algae, and fungi.
D) are resistant to everything except radiation.
E) can last for only about 100 years.
6) Bergey's Manual contains
A) classification schemes for prokaryotes.
B) treatments for bacterial diseases.
C) recipes for bacterial growth media.
D) genetic sequences of prokaryotes.
E) rules for naming new bacterial species.
7) Which of the following characteristics does NOT distinguish the archaea from the bacteria?
A) the types of transfer RNA used
B) the rRNA sequences present
C) the deoxyribonucleotides
D) cell wall composition
E) cell membrane composition
8) The largest known group of archaea is the
A) thermophiles.
B) halophiles.
C) cyanobacteria.
D) methanogens.
E) hyperthermophiles.
9) Which of the following types of microbes might be found in the Dead Sea?
A) hyperthermophiles
B) phototrophic bacteria
C) methanogens
D) actinomycetes
E) halophiles
10) Unusual cellular extensions called prosthecae are associated with which of the following groups of proteobacteria?
A) alpha
B) beta
C) gamma
D) delta
E) epsilon
11) Which of the following bacterial genera plays an important role in environmental nitrogen cycles?
A) Nitrobacter
B) Rhizobium
C) Azospirillum
D) both Nitrobacter and Rhizobium
E) Nitrobacter, Rhizobium, and Azospirillum
Explanation / Answer
Vary in size and shape Palisades Corynebacterium Cytoplasmic membrane May be produced when nutrients are scarce Classification schemes for prokaryotes Cell wall composition, cytoplasmic membrane lipids, and 16S rRNA sequences Methamogens Actinomycetes Alpha Nitrobacter, Rhizobium, and Azospirillum