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18 Aug 2024

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.

 

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18 Aug 2024

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} (w/v), it yielded 400 CFU. The viable bacterial count (in million, rounded off to the nearest integer) in one gram landfill sample is _______.

 

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Sourav Pan🥈 Silver
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18 Aug 2024

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.

 

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Sourav Pan🥈 Silver
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18 Aug 2024

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

 

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18 Aug 2024

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

 

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