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TLS Online TPP Program

#Question id: 5761

E. coli cells were spread on an agar plate, producing 1000 colonies.  The colonies are replica plated on two agar plates containing the antibiotic kanamycin and one agar plate without antibiotics.  All of the colonies are able to grow on the agar plate without antibiotic but only 4 colonies are able to grow on each of the agar plates containing kanamycin.  You notice that the four colonies that grew on each of the kanamycin containing plates are in the exact same position.  This demonstrates

#XL - S Microbiology

  1. how to screen for environmental mutagens

  2. that mutations occur in prokaryotes as well as in eukaryotes

  3. that in some cases mutations are caused by the selective agent itself

  4. a direct correlation between the amount of the selective agent used and the number of resistant mutants (one-hit relationship)

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TLS Online TPP Program

#Question id: 14981

#XL - S Microbiology

The endoplasmic reticulum has many important functions. It transports proteins, lipids, and probably other materials through the cell. The ER is also a major site of 
TLS Online TPP Program

#Question id: 934

#XL - Q Biochemistry

Nitrogen fixation may occur via all of the following bacteria, except
TLS Online TPP Program

#Question id: 5550

#XL - T Zoology

The vertebrate nervous system is derived from
TLS Online TPP Program

#Question id: 20105

#XL - P Chemistry

Identify the correct statement regarding a spontaneous process :
TLS Online TPP Program

#Question id: 2183

#XL - S Microbiology

Transepithelial glucose transport uses a symporter to transport glucose up a concentration gradient by: