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?

#SCPH06 I Botany

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: 18392

#SCPH28 | Zoology

How Deinococcus radiodurans are naturally resistant to quite high levels of ionizing radiation

TLS Online TPP Program

#Question id: 18590

#SCPH06 I Botany

Origin of life starts from which geological time period?

TLS Online TPP Program

#Question id: 18590

#SCPH28 | Zoology

Origin of life starts from which geological time period?

TLS Online TPP Program

#Question id: 18591

#SCPH06 I Botany

First green plants and fungi appeared on the land during which period?

TLS Online TPP Program

#Question id: 18591

#SCPH28 | Zoology

First green plants and fungi appeared on the land during which period?

TLS Online TPP Program

#Question id: 18592

#SCPH06 I Botany

Flowering plant first appeared in___