Question: Which is a suffix (word ending) used to denote something that kills cells:
-cidal
Answer Choices:
-lethal
-static
-phobic
Answer: -cidal
Question: Please answer parts A-C in reference to depicted microscope lens features.
A. The total magnification of this microscope is _____ x.
B. The limit of resolution of this microscope (assuming the wavelength is 255 nm) is _____ nm. Provide with correct unit.
C. If two cells are 90 nm apart, they will appear _____.
Answer: A. 1000x
B. 170 nm
C. blurred
Question: A segment of DNA that codes for the synthesis of an RNA molecule that will then code for a specific protein is a _______.
Answer Choices:
gene
thymine
chromosome
plasmid
Answer: gene
Question: During aerobic respiration, the most ATP is produced from:
Answer Choices:
Glycolysis
Krebs (TCA) cycle
Electron transport chain
Fermentation
Answer: Electron transport chain
Question: If you flood starch agar plates with Gram’s iodine the agar will turn purple. If the starch has been broken down, a ______ will appear around the colony.
Answer Choices:
Clear zone
Zone of inhibition
Yellow halo
Metallic sheen
Answer: Clear zone
Question: ______ medium designed to permit the growth of a particular organism while inhibiting the growth of others.
Answer Choices:
Complex
Defined
Differential
Selective
Answer: Selective
Question: Which antimicrobial target would result in high (good) selective toxicity for that drug?
Answer Choices:
Cell membrane function
Peptidoglycan synthesis
Nucleic acid synthesis
None of these
Answer: Peptidoglycan synthesis
Question: What enzyme breaks down starch?
β-Galactosidase
Answer Choices:
Glucoamylase
Amylase
Disaccharidase
Answer: Amylase
Question: If you flood starch agar plates with Gram’s iodine the agar will turn purple. If the starch has been broken down, a __________ will appear around the colony.
Clear zone
Answer Choices:
Zone of inhibition
Yellow halo
Metallic sheen
Answer: Clear zone
Question: What is the dilution factor, if you conducted a serial dilution of 0.1 mL of stock culture added to 9.9 mL PSB?
Answer Choices:
10^-1
10^-2
10^-3
10^-4
Answer: 10^-2
Question: Endo agar is both selective and differential. The agar selects for __________ bacteria and differentiates those that grow by their ability to __________.
Gram-positive, ferment lactose
Answer Choices:
Gram-negative, ferment lactose
Acid-fast, produce endospores
Aerobic, reduce nitrate
Answer: Gram-negative, ferment lactose
Question: ____________ is an intermediate molecule in glycolysis.
Pyruvate
Answer Choices:
Glyceraldehyde-3-phosphate (G-3-P)
Acetyl-CoA
Glucose
Answer: Glyceraldehyde-3-phosphate (G-3-P)