TLS Online TPP Program

#Question id: 1696


TCR recognition of peptide-MHC class II depends on:

#Unit 4. Cell Communication and Cell Signaling
  1. Covalent binding

  2. Very high affinity interactions

  3. CDR-mediated binding

  4. A minimum of two peptides occupying the binding groove of each MHC molecule

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TLS Online TPP Program

#Question id: 27034

#Unit 10. Ecological Principles

A parasite Toxoplasma gondii infects rat and changes behaviour of rat through odour, such as

TLS Online TPP Program

#Question id: 4299

#Unit 3. Fundamental Processes

Lactate dehydrogenase (LDH) can exist as various tetrameric isozymes. Extracts from different rat tissues were run on a nondenaturing polyacrylamide gel and stained for LDH activity, as shown below. Standard tetramers of M subunits (M4) and H subunits (H4) were run alongside the tissue extracts. Which of the following is the subunit composition of the isozyme running at position 2 ?

TLS Online TPP Program

#Question id: 4798

#Unit 8. Inheritance Biology

In goats, a beard is produced by an autosomal allele that is dominant in males and recessive in females. We’ll use the symbol Bb for the beard allele and B for the beardless allele. Another independently assorting autosomal allele that produces a black coat (W) is dominant over the allele for white coat (w). A cross allowed between BBbWw (male) X BBbWw (female). What is proportional of female progeny will beard with black coat?

TLS Online TPP Program

#Question id: 3046

#Unit 2. Cellular Organization

Which one of the following reagent used in differentiation of gram positive and Gram negative bacteria?

(P) Congo red                        (Q) Safranine

(R) Methylene blue                  (S) Iodine

TLS Online TPP Program

#Question id: 17199

#Unit 11. Evolution and Behavior