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TLS Online TPP Program

#Question id: 1591

Which of the following is not true about helper T cells?

#XL - S Microbiology

  1. They function in cell-mediated and humoral responses.

  2. They recognize polysaccharide fragments presented by class II MHC molecules.

  3. They bear surface CD4 molecules.

  4. They are subject to infection by HIV.

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TLS Online TPP Program

#Question id: 20050

#XL - P Chemistry

If numerical value of mass and velocity are equal then de-Broglie wave length in terms of K.E.
TLS Online TPP Program

#Question id: 15478

#XL - S Microbiology

Escherichia coli preferentially utilizes glucose by preventing the uptake of lactose and switching off transcription of the lac operon. This mechanism is known as 
TLS Online TPP Program

#Question id: 10816

#XL - T Zoology

When a harmless species takes advantage by resembling the aposematic coloration of other species that are toxic, it is called _____________________.
TLS Online TPP Program

#Question id: 27442

#XL - R Botany

The processes which are basics to taxonomy include?
TLS Online TPP Program

#Question id: 19631

#XL - P Chemistry

When NH4Cl is added to NH4OH solution the dissociation of ammonium hydroxide is reduced. It is due to: