BIOL 2321 EXAM QUESTIONS AND
ANSWERS
Lipoprotein - Correct Answers -Attaches the peptidoglycan to the membrane in Gram-
negative bacteria
Gram-positive bacteria - Correct Answers -More likely to tolerate excessive osmotic
pressure conditions
Archeal cell wall - Correct Answers -Pseudomurien
DNA, RNA, protien - Correct Answers -compromises about 25% of the cell weight of a
bacterial cell
Microbes - Correct Answers --Archaea is an extremophile
-Viruses require host to replicate
Types of microbes - Correct Answers -viruses, algae, archaea
Periplasm - Correct Answers -found only in the cell of gram-negative bacteria
Ether-linked lipids - Correct Answers -found in some Archaea
Ion gradients - Correct Answers -storage of potential energy
ori sequence - Correct Answers -Is duplicated very early during the initial stage of DNA
replication
carboxysome - Correct Answers -is Fresh source of water, photosynthetic or lithotrophic
Polysome formation - Correct Answers -can be done in bacteria because they lack a
nuclear membrane
Bacterial movement - Correct Answers -Flagellum, flagella, Pili, Gas Vacuoles,
Magnetosomes
Louis Pasteur - Correct Answers --microbes are responsible for chemical process of
wine (fermentation)
-Microbial growth & metabolism still occur with lack of O2
-Formation of acetic acid due to contaminating microbes
Cell layers of bacteria cells - Correct Answers --lipoprotein
-S Layer
-capsule
ANSWERS
Lipoprotein - Correct Answers -Attaches the peptidoglycan to the membrane in Gram-
negative bacteria
Gram-positive bacteria - Correct Answers -More likely to tolerate excessive osmotic
pressure conditions
Archeal cell wall - Correct Answers -Pseudomurien
DNA, RNA, protien - Correct Answers -compromises about 25% of the cell weight of a
bacterial cell
Microbes - Correct Answers --Archaea is an extremophile
-Viruses require host to replicate
Types of microbes - Correct Answers -viruses, algae, archaea
Periplasm - Correct Answers -found only in the cell of gram-negative bacteria
Ether-linked lipids - Correct Answers -found in some Archaea
Ion gradients - Correct Answers -storage of potential energy
ori sequence - Correct Answers -Is duplicated very early during the initial stage of DNA
replication
carboxysome - Correct Answers -is Fresh source of water, photosynthetic or lithotrophic
Polysome formation - Correct Answers -can be done in bacteria because they lack a
nuclear membrane
Bacterial movement - Correct Answers -Flagellum, flagella, Pili, Gas Vacuoles,
Magnetosomes
Louis Pasteur - Correct Answers --microbes are responsible for chemical process of
wine (fermentation)
-Microbial growth & metabolism still occur with lack of O2
-Formation of acetic acid due to contaminating microbes
Cell layers of bacteria cells - Correct Answers --lipoprotein
-S Layer
-capsule