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Stack #4714892

QuestionAnswer
The term used to describe a disease-causing microorganism is
pathogen Archaea differ from bacteria in that archaea
have cell walls composed of substances other than peptidoglycan. A system of classification grouping organisms into 3 domains based on the cellular organization of organisms was devised by
Carl Woese. Which of the following is NOT a domain in the three-domain system?
animalia Protozoan motility structures include
cilia
flagella
and pseudopods. The bacterial shape of the cells in the scanning electron micrograph shown in the figure would best be described as
bacillus. A prokaryotic cell may possess each of the following cellular components EXCEPT
a nucleus. Fungal infections are studied by
mycologists. Robert Koch identified the cause of
anthrax. In which of the following situations would Koch's postulates be utilized?
determination of the cause of a new emerging disease by scientists studying disease transmission The arguments supporting spontaneous generation were finally disproved by
Louis Pasteur. Who is credited with first observing microorganisms?
Anton van Leeuwenhoek Who is credited with first observing cells?
Robert Hooke. Which of the following statements is INCORRECT regarding prokaryotic cells?
They lack a plasma membrane. Which drawing in the figure is streptococci?
d Which structure protects bacteria from being phagocytized?
capsule In the figure
which diagram of a cell wall contains teichoic acids?
a In the figure
which diagram of a cell wall is decolorized by a brief exposure to alcohol?
b In the figure
which diagram of a cell wall has a structure that protects against osmotic lysis?
both a and b In the figure
which diagram of a cell wall possesses lipid A/endotoxin responsible for symptoms associated with infection?
b In the figure
which diagram of a cell wall is a gram-negative cell wall?
b Which of the following statements about gram-negative cell walls is FALSE?
They are sensitive to penicillin. In bacterial ribosomes
a small 30S subunit and a large 50S subunit come together to produce the functional 70S ribosome. Why isn't it an 80S ribosome?
S stands for Svedberg units
which indicates the relative rate of sedimentation due to size
weight
and shape of a particle. The numbers aren't strictly additive. The DNA found in most bacterial cells
is circular in structure. Where are phospholipids most likely found in a eukaryotic cell?
the plasma membrane and organelles Where are phospholipids most likely found in a prokaryotic cell?
the plasma membrane Which of the following statements is TRUE?
Endospores allow a cell to survive environmental changes by producing a dormant period with no growth. Which of the following is NOT a typical characteristic of most bacterial plasma membranes?
contains cholesterol Which of the following is NOT found or observed to occur in both mitochondria and prokaryotes?
cell wall You have isolated a motile
gram-positive cell with no visible nucleus. You can safely assume that the cell
has a cell wall. Each of the following statements concerning the gram-positive cell wall is true EXCEPT
it protects the cell in a hypertonic environment. What is the best reason why oxygen (O2) can cross the plasma membrane by simple diffusion
but glucose must be transported across the barrier by facilitated diffusion?
Oxygen is a much smaller molecule
making it easier to pass through the molecules of the plasma membrane. Which of the following organelles most closely resembles a prokaryotic cell?
mitochondrion Into which group would you place a photosynthetic organism that lacks a nucleus and has a thin peptidoglycan wall surrounded by an outer membrane?
Proteobacteria (gram-negative bacteria) Into which group would you place a unicellular organism that has 70S ribosomes and a peptidoglycan cell wall?
Bacteria Into which group would you place a photosynthetic cell that lacks a nucleus?
Bacteria Which of the following is the best evidence for a three-domain system?
Nucleotide sequences in ribosomal RNA vary between all three domains. Which of the following characterizes the Domain Bacteria?
prokaryotic cells; ester linkages in phospholipids In the scientific name Enterobacter aerogenes
Enterobacter is the
genus. All of the following are characteristic of algae EXCEPT which ONE of the following?
They are currently classified as plants.
Created by: user-2059103
 

 



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