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BIO 115 Final Exam questions well answered to pass
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BIO 115 Final Exam questions well answered to pass
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BIO 115 Final Exam questions wellanswered to pass
Pasteur, using homemade microscopes, was the first to see and describe microorganisms. - correct
answer ✔✔False, Van Leeuwenhoek described the first microorganisms as "animalcules".
Redi was known for his work on the Germ Theory of Disease. - correct answer ✔✔False, Louis Pasteur
came up with the Germ Theory of Disease. Redi tested spontaneous generation.
pH refers to the concentration of Na atoms in a solution. - correct answer ✔✔False, pH measures
hydrogen ion concentration in a solution.
A pH of 6 is 10x different than a pH of 7. - correct answer ✔✔True
pH= -log [H+ ] - correct answer ✔✔method used to find pH value
Covalent bonds are very weak bonds involving hydrogen. - correct answer ✔✔False, hydrogen bonds are
very weak bonds. Covalent bonds are the strongest bonds.
Prokaryotes have larger ribosomes than eukaryotes and have a nuclear membrane. - correct answer
✔✔False, prokaryotes have smaller ribosomes compared to eukaryotes. Prokaryotes do not have a
nucleus or nuclear membrane.
Exotoxins are part of the outer membrane of gram negative bacteria and consist of the lipid portion of
LPS. - correct answer ✔✔False, endotoxins are part of the membrane of G-. Exotoxins are found in G+
and G- bacteria and are made of proteins.
The cell walls of viruses are made of peptidoglycan. - correct answer ✔✔False, bacteria are made of
peptidoglycan. Virus are made of a protein capsid.
, Peptidoglycan is made of an alternating sequence of NAG and NAM sugars linked by amino acid chains. -
correct answer ✔✔True
The three main shapes of bacteria are helical, polyhedral, and complex. - correct answer ✔✔False, the
three main shapes of a virus are helical, polyhedral, and complex. Bacteria are shaped as coccus, bacillus,
or spiral.
The Fluid Mosaic Model refers to the structure of the peptidoglycan layer. - correct answer ✔✔False, the
Fluid Mosaic Model refers to the cell's membrane structure.
The lytic cycle refers to intracellular growth of bacteria. - correct answer ✔✔False, the lytic cycle refers
to destruction of a cell. The lysogenic cycle integrates into the host cell DNA and creates a new gene
known as the prophage.
Viroids and prions are bacteria. - correct answer ✔✔False, viroids and prions are viruses. RNA codes for
bacterial proteins in transcription.
Defense systems of bacteria include lysozyme, leukocidins, coagulase, and M proteins. - correct answer
✔✔False, lysozyme digests peptidoglycan and is not a defense mechanism. Leukocidins kill white blood
cells. Coagulase is seen in S. aureus. M proteins form a capsule from being eaten in Streps.
Preparation of a specimen for viewing under a microscope involves, in order: fixing, smearing, staining. -
correct answer ✔✔False, in order is smearing, fixing, and then staining.
Enzymes are usually large sugars that work by raising the activation energy. - correct answer ✔✔False,
enzymes are proteins that decrease activation energy.
Enzyme activity is not influenced by temperature, concentration, or inhibitors. - correct answer
✔✔False, it is influenced by these factors.
Glycolysis produces most of the ATP, not aerobic respiration or the electron transport system. - correct
answer ✔✔False, glycolysis produces only 2 ATP. Most of the ATP is produced at the finish of aerobic
respiration in the electron transport chain. 34 ATP is produced.
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