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#Question id: 1929


Which of the following is an example of an immune escape mechanism used by some tumor cells?

#Unit 4. Cell Communication and Cell Signaling
  1. Inhibition of indoleamine-2,3-dioxygenase

  2. Increased expression of MHC class I

  3. Increased expression of PD-L1

  4. Decreased expression of FasL

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#Question id: 23583

#Unit 13. Methods in Biology

Insert DNA may be produced by

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#Question id: 433

#Unit 1. Molecules and their Interaction Relevant to Biology

Fatty acid synthesis occurs in the ________, while fatty acid breakdown occurs in the

TLS Online TPP Program

#Question id: 11799

#Unit 6. System Physiology – Plant

Companion cells in minor veins of mature leaves. All three cell types have dense cytoplasm and abundant mitochondria, there are three types companion cells  present in column A while its characteristics given in column B;

             COLUMN A                                                             COLUMN B

A) Ordinary companion cells              i) appear well suited for taking up solutes via cytoplasmic connections numerous plasmodesmata connecting them to bundle sheath cells. Its having numerous small vacuoles, as well as poorly developed thylakoids.

 

B) Transfer cells                                    ii) have chloroplasts with well-developed thylakoids     and a cell wall with a smooth inner surface. The number of plasmodesmata connecting ordinary companion cells to surrounding cells.

C) Intermediary cells                          iii) the development of fingerlike wall in growths, particularly on the cell Walls. These wall ingrowths greatly increase the surface area of the transfer cell’s  plasma membrane, few plasmodesmata connect this type of companion cell to any of the surrounding cells except its own sieve element.

Which of the following correct combination;

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#Question id: 32424

#Unit 2. Cellular Organization

Myosin-dependent mechanism regulate contraction in smooth muscle and non-muscle cells by the mechanism, known as:

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#Question id: 26889

#Unit 10. Ecological Principles

Shifting cultivation is a form of agricultural practice in the hills of Northeast India, where a forest patch is cleared and cultivated for a few years, after which it is left fallow and allowed to regenerate. Succession occurs on such previously cultivated plots. Over time, the plant community should move towards which region in the graph?