BIOS 242 Chamberlain Midterm Exam Questions AND Correct
Answers
A cell that uses an organic carbon source and obtains energy from
light would be called a ___________. - ✔✔photoheterotroph.
A virus exists inside the cell as ____________. - ✔✔nucleic acid.
Activation energy _____________. - ✔✔is lowered by the actions of
enzymes.
Alexander Fleming - ✔✔Penicillin released from Penicillium.
algae. - ✔✔Algae are eukaryotic organisms that have no roots, stems,
or leaves but do have chlorophyll and other pigments for carrying out
photosynthesis. Algae can be multicellular or unicellular. Unicellular
algae occur most frequently in water, especially in plankton.
Aminoglycosides. - ✔✔Target 30S subunit (alter its shape).
Streptomycin, gentamicin.
An organism that tolerates high ______________ is called a halophile.
- ✔✔salt concentrations.
,Anaerobic bacteria may use which of the following as final electron
acceptors in resperation? - ✔✔oxygen.
Animal viruses lay dormant (inactive) in __________. - ✔✔latency.
Antisense nucleic acids. - ✔✔RNA or ssDNA complementary to specific
mRNA molecules of pathogens.
Azoles and allylamines. - ✔✔Inhibit ergosterol synthesis.
Bacitracin. - ✔✔Block transport of NAG and NAM from cytoplasm.
Bacteria and archaea were seperated into different domains based on
____________. - ✔✔ribosomal RNS sequences.
Bacterial pili are used for ___________. - ✔✔Conjunction.
Bacteriocins - ✔✔anti bacterial proteins encoded by bacterial
plasmids.
Beta-lactams. - ✔✔Funcional groups are beta-lactams rings. Beta-
lactams bind to enzymes that cross-link NAM subunits.
, Chains of spheres are? - ✔✔Streptococci.
Chemical reactions that can proceed toward either anabolism or
catabolism are called __________. - ✔✔amphibolic.
Chloramphenicol. - ✔✔Block 50S subunit.
Clostridia and Bacilli produce - ✔✔Endospores.
Clusters of spheres are - ✔✔Staphylococci.
Comma shaped cells are ____________. - ✔✔Vibrio.
describe in detail the Gram staining process. - ✔✔1.Flood the smear
with the basic dye crystal violet for 1 minute, and then rinse with
water. Crystal violet, which is called the primary stain, colors all cells.
2.Flood the smear with an iodine solution for 1 minute, and then rinse
with water. Iodine is a mordant, a substance that binds to a dye and
makes it less soluble. After this step, all cells remain purple.
3.Rinse the smear with a solution of ethanol and acetone for 10-30
seconds, and then rinse with water. This solution, which acts as a
decolorizing agent, breaks down the thin cell wall of Gram-negative
Answers
A cell that uses an organic carbon source and obtains energy from
light would be called a ___________. - ✔✔photoheterotroph.
A virus exists inside the cell as ____________. - ✔✔nucleic acid.
Activation energy _____________. - ✔✔is lowered by the actions of
enzymes.
Alexander Fleming - ✔✔Penicillin released from Penicillium.
algae. - ✔✔Algae are eukaryotic organisms that have no roots, stems,
or leaves but do have chlorophyll and other pigments for carrying out
photosynthesis. Algae can be multicellular or unicellular. Unicellular
algae occur most frequently in water, especially in plankton.
Aminoglycosides. - ✔✔Target 30S subunit (alter its shape).
Streptomycin, gentamicin.
An organism that tolerates high ______________ is called a halophile.
- ✔✔salt concentrations.
,Anaerobic bacteria may use which of the following as final electron
acceptors in resperation? - ✔✔oxygen.
Animal viruses lay dormant (inactive) in __________. - ✔✔latency.
Antisense nucleic acids. - ✔✔RNA or ssDNA complementary to specific
mRNA molecules of pathogens.
Azoles and allylamines. - ✔✔Inhibit ergosterol synthesis.
Bacitracin. - ✔✔Block transport of NAG and NAM from cytoplasm.
Bacteria and archaea were seperated into different domains based on
____________. - ✔✔ribosomal RNS sequences.
Bacterial pili are used for ___________. - ✔✔Conjunction.
Bacteriocins - ✔✔anti bacterial proteins encoded by bacterial
plasmids.
Beta-lactams. - ✔✔Funcional groups are beta-lactams rings. Beta-
lactams bind to enzymes that cross-link NAM subunits.
, Chains of spheres are? - ✔✔Streptococci.
Chemical reactions that can proceed toward either anabolism or
catabolism are called __________. - ✔✔amphibolic.
Chloramphenicol. - ✔✔Block 50S subunit.
Clostridia and Bacilli produce - ✔✔Endospores.
Clusters of spheres are - ✔✔Staphylococci.
Comma shaped cells are ____________. - ✔✔Vibrio.
describe in detail the Gram staining process. - ✔✔1.Flood the smear
with the basic dye crystal violet for 1 minute, and then rinse with
water. Crystal violet, which is called the primary stain, colors all cells.
2.Flood the smear with an iodine solution for 1 minute, and then rinse
with water. Iodine is a mordant, a substance that binds to a dye and
makes it less soluble. After this step, all cells remain purple.
3.Rinse the smear with a solution of ethanol and acetone for 10-30
seconds, and then rinse with water. This solution, which acts as a
decolorizing agent, breaks down the thin cell wall of Gram-negative
