TLS Online TPP Program

#Question id: 1809


Which of the following statements is TRUE of αβ T-cells?

#Unit 4. Cell Communication and Cell Signaling
  1. αβ T-cells initially express a pre-TCR bearing an invariant pre-β chain

  2. αβ T-cells express RAG-1 and RAG-2 at the pre-T stage

  3. αβ T-cells can be CD4+CD8− but not CD4−CD8+

  4. Unlike γδ T-cells, αβ T-cells do not rely on Notch-1 signaling pathways during their development

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TLS Online TPP Program

#Question id: 297

#Unit 1. Molecules and their Interaction Relevant to Biology

The boiling point of water is exceptionally high because

TLS Online TPP Program

#Question id: 11844

#Unit 6. System Physiology – Plant

The following statements are made to describe the biosynthetic pathway of IAA;

a)  IPA pathway involves a deamination reaction to form IPA, followed by a decarboxylation reaction to form indole-3-acetaldehyde (IAld) and then oxidized to IAA by a specific dehydrogenase

b) IAN pathway is similar to the IPA pathway, except that the order of the deamination and decarboxylation reactions is reversed, and different enzymes are involved

c) IAM pathway  involves the two enzymes  tryptophan monooxygenase and IAM hydrolase

d) In the IAN pathway, tryptophan is first converted to indole-3-acetaldoxime and then to indole-3-acetonitrile. The enzyme that converts IAN to IAA is called nitrilase

Which of the following is the correct  statements  of about the biosynthesis of  IAA?

TLS Online TPP Program

#Question id: 29058

#Unit 10. Ecological Principles

Water ecosystem is divided into various parts on the basis of thermal startification, at which depth of the aquatic ecosystem where the aquatic life is feasible in winter season and fishes easily survive in coldest environment?

TLS Online TPP Program

#Question id: 10214

#Unit 6. System Physiology – Plant

LHCII, one of the membrane-bound antenna pigment proteins, which can be phosphorylated and non-phosphorylated by a specific kinase present in thylakoid membrane. Which of the following statements are NOT TRUE ?

TLS Online TPP Program

#Question id: 2815

#Unit 2. Cellular Organization

Telomerase

a. extends DNA strands during DNA synthesis.

b. has reverse transcriptase activity.

c. is a protein-RNA complex.

d. replicates repetitious DNA located at the centromere.