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TLS Online TPP Program

#Question id: 1368

The following statements are made with reference to the characteristic of proteoglycans (major constituents of ECM). Which one of them is incorrect?

#Unit 4. Cell Communication and Cell Signaling

  1. Perlecan the major secreted proteoglycan in basal laminae, consists of a large multidomain core protein (∼470 kDa) to which polysaccharides are covalently attached.

  2. Perlecan contains three types of covalent polysaccharide chains: N-linked chains, O-linked chains, and glycosaminoglycans (GAGs).

  3. Perlecan can be found in basal laminae and in non–basal laminal ECM.

  4. The adhesion receptor dystroglycan can bind perlecan indirectly, via perlecan’s LG domains, and directly, via its binding to laminin.

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TLS Online TPP Program

#Question id: 60

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following is true for the reaction?

3H2 + N2   2NH3
TLS Online TPP Program

#Question id: 12762

#Unit 10. Ecological Principles

Find  appropriate option for  given question . The figure above depicts the intensity versus frequency curve of an a2coustical receptor of the larva of a noctuid moth. The larva is preyed on by a wasp whose vibrating wings produce a0buzz.
On the basis of the figure, it can be predicted that the wasp buzz 1has a frequency
TLS Online TPP Program

#Question id: 752

#Unit 1. Molecules and their Interaction Relevant to Biology

The A260/A280 ratio of a double-stranded DNA sample can be used to assess its purity. The value for the pure DNA is ----------------
TLS Online TPP Program

#Question id: 12083

#Unit 10. Ecological Principles

In bottom sediments of lakes and streams, organic matter is broken down by heterotrophic microorganisms and ammonia is released. Under aerobic conditions, specialized bacteria convert ammonia to nitrate (nitrification). This nitrate, together with nitrate from other sources, diffuses into the deeper sediments, where it may undergo anaerobic conversion to nitrogen gas (denitrification). These sediments typically contain oligochaete worms that live with their heads buried and their tails waving back and forth in the overlying water. Plastic columns were packed with freshly collected stream sediments and then  covered  with  layers  of  nitrate enriched  water.  A similar  set  of  columns  was packed with sediment that had been sterilized and then covered with either nitrate-enriched water or distilled water. Oligochaete  worms  were  collected  and  acclimated  to  20°(C)Following  acclimation,  worms  were  rinsed  in  distilled water and then added to three sediment columns. The columns were incubated in the dark at 20°C and monitored every three days for changes in the concentration of nitrate in the overlying water. Nitrate concentrations in each of the experimental treatments were plotted against time, as shown in the graph below

It can be concluded from the figure that
TLS Online TPP Program

#Question id: 103

#Unit 1. Molecules and their Interaction Relevant to Biology

Lipids may be either hydrophobic or ________.