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31 terms

Microbiology Lect Exam 1 Website

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Which of the following terms best describes the first primitive eukaryotes?
Single Celled
Endosymbiosis proposes that
eukaryotic cells arose when a much larger prokaryotic cell engulfed smaller bacterial cells that eventually developed into organelles.
Identify which of the following is theorized to have developed and can be explained by the endosymbiotic theory.
mitochondria
Eukaryotic flagella whip back and forth rather than rotating. This is because within a eukaryotic flagellum we typically find
a 9+2 arrangement of microtubules which slide past each other during movement.
Eukaryotic cells have several structural attributes which separate them from prokaryotes. Which of these attributes are found in eukaryotes, but NOT found in prokaryotes?
larger size, organelles, nuclear membrane
Before mitosis, chromosomes are visible only as
chromatin
Where is the site for protein modification in a eukaryotic cell?
in the Golgi complex
Lysosomes are vesicles that
are involved in intracellular digestion of food particles.
The bulk of the energy required by the eukaryotic cell is generated by the mitochondria. The mitrochondrion consists of cristae that
are elaborate folds on the inner membrane which hold the enzymes and electron carriers of aerobic respiration.
Chloroplasts convert the solar energy from sunlight into
chemical energy.
Ribosomes are found free within the cytoplasm as well as bound to rough endoplasmic reticulum. They are the sites of
protein synthesis.
Identify the structure that does NOT have a double membrane protecting it.
ribosome
The Kingdom Fungi, or Myceteae, consist of macroscopic fungi and microscopic fungi. Identify the microscopic fungi from the following list:
yeast
Most fungi are _____________, and get their food via _________
saprobes, extracellular digestion.
Which of the following is NOT one of the four major divisions among terrestrial fungi?
zygomycota
ascomycota
basidiomycota
Correct answer: mastigophora
Filamentous fungi
have hyphae that make up mycelia.
Mycoses are
fungal infections.
Kingdom Protista includes
algae & protozoans.
Protozoa are primarily
free-living
Protist survival is limited mainly by
availability of moisture.
Protozoans are often able to survive changing environmental conditions by forming
cysts
Algae can cause health problems because
they may produce toxins.
Helminths are
animals.
Identify the helminth that reproduces through eggs released from proglottids.
Correct answer:
tapeworm
Evidence from paleontology indicates that the first eukaryotic cells appeared on the earth approximately 2 billion years ago.
true
The biologist responsible for the formulation of the endosymbiotic theory is Dr. Lynn Margulis.
true
The cell walls of fungi and algae are rigid and provide structural support and shape, and are similar to prokaryotic cell walls in chemical composition.
false
Most fungi can only reproduce sexually via spores.
false
Red tide is the result of an elaborate "bloom" of protozoans.
True
false
Pfiesteria piscicida is a toxic algal form that is associated with neurological disease symptoms
true
Helminths are identified in the laboratory by microscopic examination of body fluids and excretions containing the eggs and larvae.
true