TLS Online TPP Program

#Question id: 1695


The processed peptide binding to the MHC class I groove:

#Unit 4. Cell Communication and Cell Signaling
  1. Is usually more than 11 amino acids long

  2. Hangs over the ends of the groove

  3. Usually binds to the groove through two anchor residues

  4. Is mainly recognized by the CDR2 of the T-cell receptor chains

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TLS Online TPP Program

#Question id: 10155

#Unit 6. System Physiology – Plant

Which of the following components carries out oxygen cycle and also produces hydrogen per oxide ?

TLS Online TPP Program

#Question id: 29093

#Unit 10. Ecological Principles

Five Hypotheses Explain How Species Richness Affects Community Services
I-Elton’s hypothesis
II-rivet hypothesis
III-Redundancy hypothesis
IV-Keystone hypothesis
V-Idiosyncratic hypothesis
a) Species that play the same roles in a community can compensate for each other if some are lost under particular conditions
b) Community services change as the number of species increases or decreases
c) there is a linear correlation between species richness and community services
d) species is an organism that helps hold the system together
e)Some species play a small but critical role in keeping the plane
Correctly match the following hypothesis with their correct  prediction;

TLS Online TPP Program

#Question id: 23888

#Unit 13. Methods in Biology

A recessive allele usually results from a mutation that
a. disrupts expression of the gene.
b. alters the structure of the encoded protein leading to gain of function.
c. alters the structure of the encoded protein leading to loss of function.
d. increases the activity of the encoded protein.

TLS Online TPP Program

#Question id: 18749

#Unit 13. Methods in Biology

All the molecules generated during PCR will not be full length. Some will also be of intermediate length. Which of the statements is correct?

TLS Online TPP Program

#Question id: 7150

#Unit 5. Developmental Biology

What is the role of semaphorins and Eph ligands in development of the nervous system?