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TLS Online TPP Program

#Question id: 2661

In the histidine operon, if the codons coding for histidine were removed, which of the following would you predict would happen?

#XL - T Zoology

  1. the attenuator would form, stopping further transcription

  2. the attenuator would not form, stopping further transcription

  3. the attenuator would form, permitting transcription to continue

  4. the attenuator would not form, permitting transcription to continue

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TLS Online TPP Program

#Question id: 3753

#XL - Q Biochemistry

Cytosine makes up 42% of the nucleotides in a sample of DNA from an organism. Approximately what percentage of the nucleotides in this sample will be thymine?
TLS Online TPP Program

#Question id: 18533

#XL - R Botany

Which of the fibres have high tensile strength 
TLS Online TPP Program

#Question id: 34082

#XL - S Microbiology

Regarding Gram staining and bacterial cell wall characteristics, which statements are correct?
TLS Online TPP Program

#Question id: 4945

#XL - S Microbiology

Which is a defining characteristic that all protobionts had in common?
TLS Online TPP Program

#Question id: 5846

#XL - T Zoology

The bacteriophage can lysogenize after infecting a bacterium, i.e. integrate into the host bacterial chromosome by site-specific recombination, and may reside there for many generations before an excision event regenerates the viral genome in an infective form.  Which one of the following is not a component of these events?