MICROBIOLOGY UTA 2460 FINAL TEST
2026 QUESTIONS WITH CORRECT ANSWERS
GRADED A+
• When two adjacent thymine molecules are joined by a covalent bond as a
result of exposure to UV light, this structure is referred to as a....
Answer: thymine dimer
• A drug exhibiting which therapeutic index value would be the safest, most
effective to use on a patient....
Answer: 20
• The alpha (a) helix is a type of __ protein structure....
Answer: secondary
• Surfactants work by....
Answer: disrupting membrane integrity
• lowest frequency of visible light (color).
Answer: red
• Which of the following is not a major element of microbial cell....
Answer: copper
• Which of the following is mismatched....
Answer: plasmids - contain genes essential for growth and metabolism
• Robert Koch (1884).
Answer: a specific microbe can cause a specific disease -koch's postulates
• Galileo Galilei.
Answer: used compound microscope that passed light through 2 sets of
lenses
• Each of the following is a target of antimicrobial agents except....
Answer: cytoplasm
, • Which of the following is not a mode of action of antiviral drugs....
Answer: bond to ergosterol in the cell membrane
• brightfield microscope.
Answer: uses 2 or more lenses to produce a dark image on a light
background, most common, used at UTA
• If an organism growing on Kligler's iron agar ferments glucose, but NOT
lactose, why does the slant ultimately turn red....
Answer: when the glucose supply is exhausted, the organism turns to
peptone degradation, releasing alkaline end products
• If light enters a substance with a ____ refractive index (lower/higher) it will
_____ (slow down/ speed up).
Answer: higher, slow down (and bends toward the normal line away from
the boundary)
• What type of mutation alters the base but not the amino acid being coded
for....
Answer: silent
• The site for ribosomal RNA synthesis is the....
Answer: nucleolus
• Hydrogen bonds....
Answer: result from attractive forces between molecules with polar covalent
bonds
• Placing organisms at 4C is....
Answer: bacteriostatic
• Match the term to the type of flagella presence on bacterial cells... 1.
Flagella all over the cell surface 2. Tuft of flagella at one end 3. Flagella at
both poles a. lophotrichous b. peritrichous c. amphitrichous.
Answer: 1-b, 2-a, 3-c
• cell wall in gram +.
Answer: have peptidoglycan in thicker layers than Gram (-) & embedded
2026 QUESTIONS WITH CORRECT ANSWERS
GRADED A+
• When two adjacent thymine molecules are joined by a covalent bond as a
result of exposure to UV light, this structure is referred to as a....
Answer: thymine dimer
• A drug exhibiting which therapeutic index value would be the safest, most
effective to use on a patient....
Answer: 20
• The alpha (a) helix is a type of __ protein structure....
Answer: secondary
• Surfactants work by....
Answer: disrupting membrane integrity
• lowest frequency of visible light (color).
Answer: red
• Which of the following is not a major element of microbial cell....
Answer: copper
• Which of the following is mismatched....
Answer: plasmids - contain genes essential for growth and metabolism
• Robert Koch (1884).
Answer: a specific microbe can cause a specific disease -koch's postulates
• Galileo Galilei.
Answer: used compound microscope that passed light through 2 sets of
lenses
• Each of the following is a target of antimicrobial agents except....
Answer: cytoplasm
, • Which of the following is not a mode of action of antiviral drugs....
Answer: bond to ergosterol in the cell membrane
• brightfield microscope.
Answer: uses 2 or more lenses to produce a dark image on a light
background, most common, used at UTA
• If an organism growing on Kligler's iron agar ferments glucose, but NOT
lactose, why does the slant ultimately turn red....
Answer: when the glucose supply is exhausted, the organism turns to
peptone degradation, releasing alkaline end products
• If light enters a substance with a ____ refractive index (lower/higher) it will
_____ (slow down/ speed up).
Answer: higher, slow down (and bends toward the normal line away from
the boundary)
• What type of mutation alters the base but not the amino acid being coded
for....
Answer: silent
• The site for ribosomal RNA synthesis is the....
Answer: nucleolus
• Hydrogen bonds....
Answer: result from attractive forces between molecules with polar covalent
bonds
• Placing organisms at 4C is....
Answer: bacteriostatic
• Match the term to the type of flagella presence on bacterial cells... 1.
Flagella all over the cell surface 2. Tuft of flagella at one end 3. Flagella at
both poles a. lophotrichous b. peritrichous c. amphitrichous.
Answer: 1-b, 2-a, 3-c
• cell wall in gram +.
Answer: have peptidoglycan in thicker layers than Gram (-) & embedded
