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TLS Online TPP Program

#Question id: 5846

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?

#SCPH06 I Botany

  1. Excision requires two host proteins and two virally-encoded proteins.

  2. Integration requires a viral-specific protein, called integrase.

  3. RecA protein is required to catalyze the insertional recombination event.

  4. The excision event relies on different sequences than the integration event.

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TLS Online TPP Program

#Question id: 2948

#SCPH28 | Zoology

A cell that is entering the M phase of the cell cycle is:
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#Question id: 6990

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

Insects such as Drosophila undergo three molts before becoming a pupa and undergoing metamorphosis. Molting, which is also called 'ecdysis', is controlled by what hormone?
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#Question id: 1732

#SCPH01 Biochemistry

Protein tyrosine kinase activity following T-cell stimulation:
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#Question id: 6985

#SCPH01 Biochemistry

The ventricular proliferative zone is:
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#Question id: 8909

#SCPH28 | Zoology

Which of the following terms or structures is properly associated only with animals?