MCB 3023 Exam 1 question with correct
answers graded A+
In which of these are Archaea and Bacteria significantly different?
lack of a membrane-enclosed nucleus
possession of membrane enclosed organelles
cell size
membrane lipid structure
chromosome size and organization - correct answer ✔✔membrane lipid structure
Several Archaea have a lipid monolayer instead of a lipid bilayer comprising their
cytoplasmic membrane. Why could this be an advantage?
This type of structure is permeable to protons
This type of structure offers considerable protection against osmotic pressure
,This type of chemical lipid structure is more stable at very high temperatures
Proteins are able to integrate more easily into this type of structure
Carbohydrates can easily diffuse across this structure to provide nutrients for the
cell - correct answer ✔✔This type of chemical lipid structure is more stable at
very high temperatures
What is the primary reason that Woese and Fox choose the rRNA molecule to
study phylogenetic relationships between organisms?
Ribosomal RNA is abundant in the cell
Ribosomal RNA sequencing was very easy to perform at the time
Ribosomal RNA is very easy to isolate and manipulate
Ribosomal RNA is a molecule found in all living organisms
Ribosomal RNA is a very stable molecule - correct answer ✔✔Ribosomal RNA is a
molecule found in all living organisms
Chaperone proteins in hyperthermophilic archaeal cells are known as
,thermosomes
desmosomes
ribosomes
chaperonins
hyperthermosomes - correct answer ✔✔thermosomes
Why might the process of chemotaxis in the archaeon Halobacterium be similar to
chemotaxis in Bacteria?
Fagellum assembly is identical in both Halobacterium and Bacteria
Both Halobacterium and Bacteria use ATP to turn the flagellum
Genes that encode proteins for flagellum assembly are found in both
Halobacterium and Bacteria
, The flagellin protein is almost identical in sequence for both Halobacterium and
Bacteria
Similar proteins in the chemotaxis signaling pathway are found in both
Halobacterium and Bacteria - correct answer ✔✔Similar proteins in the
chemotaxis signaling pathway are found in both Halobacterium and Bacteria
Eukaryal microbes play a very important role in the digestion of ___ in the gut of
ruminants
nucleic acids
phospholipids
lactose
proteins
cellulose - correct answer ✔✔cellulose
Giardia lamblia is of significance because:
answers graded A+
In which of these are Archaea and Bacteria significantly different?
lack of a membrane-enclosed nucleus
possession of membrane enclosed organelles
cell size
membrane lipid structure
chromosome size and organization - correct answer ✔✔membrane lipid structure
Several Archaea have a lipid monolayer instead of a lipid bilayer comprising their
cytoplasmic membrane. Why could this be an advantage?
This type of structure is permeable to protons
This type of structure offers considerable protection against osmotic pressure
,This type of chemical lipid structure is more stable at very high temperatures
Proteins are able to integrate more easily into this type of structure
Carbohydrates can easily diffuse across this structure to provide nutrients for the
cell - correct answer ✔✔This type of chemical lipid structure is more stable at
very high temperatures
What is the primary reason that Woese and Fox choose the rRNA molecule to
study phylogenetic relationships between organisms?
Ribosomal RNA is abundant in the cell
Ribosomal RNA sequencing was very easy to perform at the time
Ribosomal RNA is very easy to isolate and manipulate
Ribosomal RNA is a molecule found in all living organisms
Ribosomal RNA is a very stable molecule - correct answer ✔✔Ribosomal RNA is a
molecule found in all living organisms
Chaperone proteins in hyperthermophilic archaeal cells are known as
,thermosomes
desmosomes
ribosomes
chaperonins
hyperthermosomes - correct answer ✔✔thermosomes
Why might the process of chemotaxis in the archaeon Halobacterium be similar to
chemotaxis in Bacteria?
Fagellum assembly is identical in both Halobacterium and Bacteria
Both Halobacterium and Bacteria use ATP to turn the flagellum
Genes that encode proteins for flagellum assembly are found in both
Halobacterium and Bacteria
, The flagellin protein is almost identical in sequence for both Halobacterium and
Bacteria
Similar proteins in the chemotaxis signaling pathway are found in both
Halobacterium and Bacteria - correct answer ✔✔Similar proteins in the
chemotaxis signaling pathway are found in both Halobacterium and Bacteria
Eukaryal microbes play a very important role in the digestion of ___ in the gut of
ruminants
nucleic acids
phospholipids
lactose
proteins
cellulose - correct answer ✔✔cellulose
Giardia lamblia is of significance because:
