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TLS Online TPP Program

#Question id: 2673

For a repressible operon to be transcribed, which of the following must be true?

#XL - T Zoology

  1. A corepressor must be present.

  2. RNA polymerase must bind to the promoter, and the repressor must be inactive.

  3. RNA polymerase and the active repressor must be present.

  4. RNA polymerase cannot be present, and the repressor must be inactive.

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TLS Online TPP Program

#Question id: 9573

#XL - T Zoology

The energy of incident solar radiation reaching the surface of the earth declines toward the poles from its maximum in equatorial regions. One cause of this phenomenon is greater absorption of solar energy by the earth's atmosphere at high latitudes. Why is this?
TLS Online TPP Program

#Question id: 11503

#XL - S Microbiology

Which process allowed the nucleomorphs of chlorarachniophytes to be first reduced, and then (in a few species) lost altogether, without the loss of any genetic information?
TLS Online TPP Program

#Question id: 28138

#XL - U Food Technology

Most suitable method of fruit juice concentration
TLS Online TPP Program

#Question id: 8911

#XL - R Botany

The larvae of some insects are merely small versions of the adult, whereas the larvae of other insects look completely different from adults, eat different foods, and may live in different habitats. Which of the following most directly favors the evolution of the latter, more radical, kind of metamorphosis?
TLS Online TPP Program

#Question id: 1716

#XL - Q Biochemistry

Expression of a CD8 α-α homodimer is characteristic of: