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26 Cards in this Set
- Front
- Back
What is the main structural feature that eukaryotic cells possess, but prokaryotic cell lack?
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nucleus
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What are the two types of prokaryotic organisms?
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bacteria and aarchaea
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What is the typical size range for eukaryotic cells?
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10um-100um
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3 characteristics of living things?
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responsiveness, growth, reproduction
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Which of these is only found in eukaryotes?
a. ribosomes b.chromosomes c. cell walls d. endocytosis |
endocytosis
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What is the gelatinous, sticky substance that surrounds prokaryotic cells?
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glycocalyx
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What external structure of prokarytoic cells helps them adhere to each other and to substances in their enviroment?
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fimbria
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What is the name of the archaeal attachment structures that project from the surface of the cell and have ends that resemble a grappling hook?
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hami
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Which of the answers below best describes one of the functions of the bacterial cell wall?
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protection from osmotic forces
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Where can lipopolysaccharides be found?
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in the outer membrane of gram-negative bacterial cells
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which of the following is a function of the cytoplasmic membrane?
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to control the passage of substances into and out of the cell
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Active transport across the cytoplasmic membrane differs from facilitated diffusion in what respect?
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active transport is used to move materials against their electrochemical gradient
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True or false?
Endospores form in response to harsh environmental conditions |
true
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Which internal structures of prokaryotic cells is/are the target of many antibacterial drugs?
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ribosomes
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A bacterial cell, which has a cytoplasmic solute concentration equal to 0.85% NaCl is placed into a tube containing a solution that has a NaCl concentration of 0.2%. Into what type of solution has the cell been placed?
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hypotonic
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Which of these are in BOTH gram-negative and Gram-positive call walls?
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peptidogycan
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Which cell wall structure has the thickest peptidoglycan layer?
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gram-positive
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What is another name for LPS?
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endotoxin
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Lysozyme is an antibacterial enzyme in human tears that degrades peptidoglycan. Which type of organism would be most sensitive to lysozyme?
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gram-positive bacteria
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Mycoplasma have no cell wall, only membrane. What characteristic would you expect for these bacteria?
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sensitivity to osmotic lysis
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Which of the following statements best describes the ribosomes of eukaryotic cells?
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eukaryotic ribosomes are 80s
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Functions of cytoskeleton in eukaryotic cells? (3 things)
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anchors organelles
gives the cell its basic shape moves organelles within the cell |
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What organelle is responsible for receiving, processing, and packaging large molecules that are destines to be secreted from the cell?
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golgi body
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What organelle is considered to be the "powerhouse" of the cell?
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mitochondrion
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What structure must eukaryotic cells have in order to harvest light energy during photosynthesis?
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chloroplasts
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What theory did Lynn Margulis propose as a way to explain the formation of eukaryotic cells?
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endosymbiotic theory
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