In the nitrogen cycle, which of the following steps involves removal of nitrogen from the atmosphere by bacteria? - answer-Nitrogen Fixation
If enough H+ ions are added to pure water to raise the H+ concentration of the solution to ten times higher than the original concentration, what is the re...
Straightliner microbiology final exam
In the nitrogen cycle, which of the following steps involves removal of nitrogen
from the atmosphere by bacteria? - answer-✔Nitrogen Fixation
If enough H+ ions are added to pure water to raise the H+ concentration of the
solution to ten times higher than the original concentration, what is the resulting
OH- concentration of the solution? - answer-✔10-8 M
Fungi are able to reproduce asexually by creating conidiospores and
sporangiospores. Which of the following is an accurate explanation for why it is
advantageous that they are also capable of sexual reproduction? - answer-
✔Offspring from two parents may have variations in form and function that
contribute to survival of the species.
In a laboratory bacterial cell culture that has been infected by a virus, plaques are
areas in which... - answer-✔the virus has spread and left behind the remains of
dead cells.
The sun's energy is delivered as discrete packets that travel as waves and are called
- answer-✔Photons
What is a characteristic of aerobic respiration? - answer-✔The process includes
glycolysis, the Krebs cycle, and the electron transport chain.
In completing protein synthesis in a prokaryote, what basic message is carried by a
specialized codon that has no corresponding tRNA? - answer-✔"Terminate here."
,Microbial drug resistance can be caused by mutations or by introduction of new
genes into a population. Which of the following can only be caused by the
introduction of new genes into a population? - answer-✔new enzymes that
inactivate the drug are synthesized
Why do the hands, feet, and breasts have more lymphatic vessels for host defense
than other areas of the human body? - answer-✔They have a high risk for infection
due to frequent contact.
Penicillin functions as an antimicrobial agent by inhibiting bacterial... - answer-
✔cell wall synthesis.
Which class of eukaryotic microorganisms can be subdivided into groups such as
Mastigophora, Sarcodina, Ciliophora, and Apicomplexa? - answer-✔Protozoa
Genetic material can be excised from one chromosome and directly integrated into
another via... - answer-✔transposons
What immune cell secretes numerous cytokines that help to coordinate the
response of other immune cells? - answer-✔TH cell
What enzymes are used to amplify DNA during PCR? - answer-✔DNA polymerase
Which of the following is a scientific name? - answer-✔Streptococcus pyogenes
Eosin-methylene blue agar, or EMB, is a commonly used bacteriological medium
for growing gram-negative bacteria from complex environments. It contains two
dyes, eosin and methylene blue, as well as the sugar lactose. Eosin is a pH
, indicator that changes color when the medium is acidic, while methylene blue
inhibits the growth of most gram-positive bacteria. If an organism consumes
lactose, acid will be produced, causing the bacterial colonies to change color.
Based upon this description, this medium is ______ - answer-✔differential and
selective
A diagram of the three domains (Bacteria, Archaea, Eukarya) proceeding from the
Last Universal Common Ancestor would show Archaea - answer-✔branching off
the Domain Eukarya.
In the cell cytoplasm, molecules of ATP are a - answer-✔solute
The _____ of the microscope holds and allows selection of the objective lenses. -
answer-✔nosepiece
Characteristics shared by all cells include - answer-✔the presence of cellular fluid,
the possession of genetic information, and a membrane serving as a cell boundary.
Anything that occupies space and mass is called... - answer-✔matter
Trees of life illustrate the phylogenetic relationships of all organisms were
traditionally based on _____; newer methods for determining phylogeny rely on
_____. - answer-✔Morphology; nucleic acid sequences
Covalent bonds - answer-✔result from sharing electrons
One nucleotide contains one - answer-✔phosphate, pentose sugar, nitrogen base
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