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TLS Online TPP Program

#Question id: 28382

Antennapedia(Antp) and Ultrabithorax (Ubx) are the two homeotic gene, which is required for the identity of the segments such as?
a) Antennapedia(Antp) is required for the identity of the third thoracic segment 
b) Antennapedia(Antp) is required for the identity of the second thoracic segment
c) Ultrabithorax (Ubx) is required for the identity of the third thoracic segment
d) Ultrabithorax (Ubx) is required for the identity of the second thoracic segment

#Unit 5. Developmental Biology
  1. a and c
  2. a and d
  3. b and c
  4. b and d
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TLS Online TPP Program

#Question id: 13062

#Unit 13. Methods in Biology

Precision will be reduced, but yield will be increased
Optimisation of a PCR reaction is often a compromise between the competing demands for precision, efficiency and yield. Although the specific effects may vary, generally, increasing the annealing temperature will increase non-specific primer binding and reduce precision. Increasing the length of the elongation phase will reduce the proportion of incomplete newly-synthesised strands and therefore increase yield. In this case, the potential effect on efficiency is unclear. Increasing the elongation phase would increase the reaction time, but the time taken to ramp down to a lower annealing temperature would be reduced.
A restriction enzyme cleaves a circular plasmid vector to produce fragments : 1kb, 0.3kb, 2kb, 1kb and 0.3kb. How many bands will be visible on agarose gel?
TLS Online TPP Program

#Question id: 1513

#Unit 4. Cell Communication and Cell Signaling

The kinase activity of ATM is activated in response to DNA damage due to various stresses (e.g., UV irradiation, heat). Activated ATM then triggers following pathways leading to arrest in G1.

A. Chk2 is phosphorylated and, in turn, phosphorylates Cdc25A, thereby marking it for degradation and blocking its role in CDK2 activation.

B. Phosphorylation of p53 stabilizes it, permitting p53-activated expression of genes encoding proteins that cause arrest in G1, promote apoptosis, or participate in DNA repair.

C. Controlling the pool of p53, ATM phosphorylates MDM2 to inactivate it, causing increased stabilization of p53. Another protein p14ARF inhibits the activity of Mdm2 thus stabilizing p53.

Based on the above information, which one of the following statements is correct?
TLS Online TPP Program

#Question id: 1101

#Unit 4. Cell Communication and Cell Signaling

The activity of adenylyl cyclase is essentially the opposite of which of the following enzymes?
TLS Online TPP Program

#Question id: 23071

#Unit 12. Applied Biology

Which of the following process using microbes to convert toxic industrial wastes to less toxic or non-toxic compounds is
TLS Online TPP Program

#Question id: 11358

#Unit 10. Ecological Principles

In Holling's functional responses of predators, what is the most fundamental difference between a Type I functional response versus Type II and Type III functional responses?