How does a HPLC work?
How does a HPLC work?
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Questions and Answers For
Basic Microbiology
250 Questions
1 Answer A fluorescence microscope with an objective lens of numerical aperture (NA) 1.5 is used with light of wavelength (λ) 600 nanometers. The lateral resolution limit of this microscope, rounded off to the nearest integer, is _________ nanometers.
A fluorescence microscope with an objective lens of numerical aperture (NA) 1.5 is used with light of wavelength (λ) 600 nanometers. The lateral resolution limit of this microscope, rounded off to the nearest integer, is _________ nanometers.
1 Answer A landfill sample was analyzed by dilution and plating techniques for viable bacterial count. When one gram of the landfill sample was diluted 1 x 10 − 4 −4 (w/v), it yielded 400 CFU. The viable bacterial count (in million, rounded off to the nearest integer) in one gram landfill sample is _______.
A landfill sample was analyzed by dilution and plating techniques for viable bacterial count. When one gram of the landfill sample was diluted 1 x 10−4^{-4}−4 (w/v), it yielded 400 CFU. The viable bacterial count (in million, rounded off to the nearest integer) in one gram landfill sample is _______.
1 Answer At t = 0, the bacterial cell number is 10,000 cells/mL. At t = 480 minutes, the cell number increased to 320,000 cells/mL. The mean generation time during this exponential growth period, rounded off to the nearest integer, is ________ minutes.
At t = 0, the bacterial cell number is 10,000 cells/mL. At t = 480 minutes, the cell number increased to 320,000 cells/mL. The mean generation time during this exponential growth period, rounded off to the nearest integer, is ________ minutes.
1 Answer Which of the following is/are TRUE about the Escherichia coli chromosome?
Which of the following is/are TRUE about the Escherichia coli chromosome? (A) It is typically bound by histones (B) It is circular in nature (C) It is found in the nucleoid (D) It contains multiple origins of replication
1 Answer At root nodules, which of the following C4 organic acid(s) is/are transported across the symbiosome membrane and into bacteroids?
At root nodules, which of the following C4 organic acid(s) is/are transported across the symbiosome membrane and into bacteroids? (A) Succinate (B) Pyruvate (C) Malate (D) Fumarate
1 Answer Which of the following is/are consequence(s) of nitrous acid (HNO2_22) mediated deamination?
Which of the following is/are consequence(s) of nitrous acid (HNO2_22) mediated deamination? (A) Deamination of cytosine, adenine, and guanine (B) GC-to-AT transitions (C) AT-to-GC transitions (D) Addition of an alkyl group to the bases
1 Answer Which of the following event(s) occur(s) during translation in prokaryotes?
Which of the following event(s) occur(s) during translation in prokaryotes? (A) tRNA binding to the start codon of mRNA on the 30S subunit of the ribosome (B) Anticodon of tRNA binding to the start codon of mRNA on the 50S subunit of the ribosome (C) The ribosome continues to move along the mRNA to add … Read more
1 Answer Which of the following cocci is/are examples of division in one plane?
Which of the following cocci is/are examples of division in one plane? (A) Staphylococci (B) Streptococci (C) Micrococci (D) Diplococci
1 Answer Which of the following is/are active transport mechanism(s) in prokaryotes where the substance is chemically altered during transport across the membrane?
Which of the following is/are active transport mechanism(s) in prokaryotes where the substance is chemically altered during transport across the membrane? (A) Group translocation (B) Simple diffusion (C) Facilitated diffusion (D) Osmosis
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