MCB3020 Exam 1 UF Questions and Answers
100% Correct
Prokaryotic kingdom - ANSWER - Monera
Hami - ANSWER - A network of cells that have a structure that makes them look like grappling hooks,
suggesting that they are involved in attaching cells to a surface
What class of organisms possesses Hami? - ANSWER - Only Archaeans
Water Activity (Aw) - ANSWER - A quantitative measurement of the water availability in a habitat
Osmotolerant - ANSWER - An organism that can grow in a wide range of solute concentrations or water
activity
Halophiles - ANSWER - Organisms that can withstand high salt concentrations
Glycosidic linkages - ANSWER - Hold together carbohydrates
Ester Linkages - ANSWER - Hold together lipids
Peptide bonds - ANSWER - Hold together proteins
Phosphodiester bonds - ANSWER - Hold together Nucleic Acids
Side chains of proteins - ANSWER - Determines Protein tertiary structure
, Refractive index - ANSWER - the ratio of the velocity of light in a vacuum to its veloctiy in a medium-
determines how much light will bend as it passes through the medium
Differential stain - ANSWER - Stain that uses more than one dye
Negative stain - ANSWER - (Acidic stain) negatively-charged acidic dye that fills in the spaces around the
specimen providing a dark contrast
Capsule - ANSWER - a well-organized layer of polysaccharides that makes it difficult for a phagocytic cell
in the immune system to engulf and destroy the cell
Streptococcus or Staphylococcus - ANSWER - Gram-positive, coccus bacteria
Bacillus or Clostridium - ANSWER - Gram-positive bacillus bacteria
E. coli and salmonella - ANSWER - Gram-negative, bacillus bacteria
Lyme Disease and syphilis - ANSWER - Spirochete-shaped bacteria
Cholera - ANSWER - Vibrio-shaped
Pleomorphic - ANSWER - Bacteria that can alter their size and shape in response to environmental
conditions
Hopanoids - ANSWER - steroid-like molecules that strengthen prokaryotic membranes and impact
membrane fluidity ONLY IN PROKARYOTES
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