Practice Questions

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?

#SCPH28 | Zoology

Excision requires two host proteins and two virally-encoded proteins.
Integration requires a viral-specific protein, called integrase.
RecA protein is required to catalyze the insertional recombination event.
The excision event relies on different sequences than the integration event.

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TLS Online TPP Program

#Question id: 5046

#SCPH28 | Zoology

During early cleavage stages in drosophila, nuclei divide through 13 cycles in the absence of any cytoplasmic cleavage. This division creates an embryo of many nuclei contained within one shared cytoplasm surrounded by one common plasma membrane, this process is called as-

TLS Online TPP Program

#Question id: 3655

#SCPH05 I Biotechnology

The mismatched base is removed from the daughter strand of DNA by:

TLS Online TPP Program

#Question id: 4569

#SCPH05 I Biotechnology

Which of the following must exist in a population before natural selection can act upon that population?

TLS Online TPP Program

#Question id: 14338

#SCPH05 I Biotechnology

Quasi steady state condition is