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TLS Online TPP Program

#Question id: 3869

Which one of the following statements about E. coli RNA polymerase (core enzyme) is false?

#SCPH28 | Zoology

  1. It can start new chains de novo or elongate old ones.

  2. It has no catalytic activity unless the sigma factor is bound.

  3. It uses nucleoside 5'-triphosphates as substrates.

  4. Its activity is blocked by rifampicin.

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TLS Online TPP Program

#Question id: 935

#SCPH01 Biochemistry

Microorganisms capable of fixing nitrogen into a form usable by animals obtain the energy for this process from ________.
TLS Online TPP Program

#Question id: 10720

#SCPH06 I Botany

What is the Jaccard index between the two communities?
TLS Online TPP Program

#Question id: 14833

#I Life Science/ Life Sciences Group – I-V

The pneumococcal vaccine is directed against the
TLS Online TPP Program

#Question id: 1642

#I Life Science/ Life Sciences Group – I-V

Which cell type produces antibodies?
TLS Online TPP Program

#Question id: 5761

#SCPH06 I Botany

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