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TLS Online TPP Program

#Question id: 2591

What kind of information can be obtained by injecting cells with fragments of heavy meromyosin (HMM) or S1 subfragments of HMM?

#Unit 2. Cellular Organization

  1. identification of actin-containing filaments and their respective polarities

  2. identification of actin-containing filaments but not their respective polarities

  3. identification of myosin-containing filaments and their respective polarities

  4. identification of myosin-containing filaments but not their respective polarities

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TLS Online TPP Program

#Question id: 12238

#Unit 10. Ecological Principles

The mussel Mytilus edulis thrives in saline habitats, in both the highly salty seawater of tidal zones and the less salty estuaries. This results in two kinds of populations: one adapted to the higher salt concentrations of the tidal zone, and one adapted to the lower salt concentrations of the estuary. It has been found that the more salt-tolerant populations have high frequencies of an allele that produces an enzyme involved in maintaining osmotic equilibrium. Conversely, estuarine mussels having the same enzyme seem to be disfavoured and have a much higher death rate than mussels without the allele. Adult estuarine populations do have lower frequencies of this allele. Each spring, large numbers of larvae from  the salty habitats pour into the estuaries.
The invasion of the seawater larvae would be expected to facilitate change in the genetic structure of the estuarine population by a process called
TLS Online TPP Program

#Question id: 1227

#Unit 4. Cell Communication and Cell Signaling

Which of the following is a mechanism for down regulation of signaling from G protein-coupled receptors?

a. a change in the Kd of the receptor-hormone complex

b. proteolysis of the Gα subunit                     

c. hydrolysis of cAMP to 5´-AMP

d. dephosphorylation of adenylyl cyclase
TLS Online TPP Program

#Question id: 5400

#General Aptitude

a, b, c, d, and e are five consecutive odd numbers then what is the average ?
TLS Online TPP Program

#Question id: 10363

#Unit 6. System Physiology – Plant

Free living nitrogen fixing takes place as shown in the following;

             TYPE                                                                                       N-FIXING GENERA

A) Cyanobacteria (blue-green algae)                                        i) Bacillus

B) Aerobic                                                                                     ii) Clostridium

C) Facultative                                                                              iii) Anabaena

D) Anaerobic nonphotosynthetic                                            iv) Rhodospirillum

E) Anaerobic photosynthetic                                                     v) Azospirillum

 Which of the following combination of free living nitrogen fixing bacteria is correct?
TLS Online TPP Program

#Question id: 11927

#Unit 9. Diversity of Life Forms

A biologist discovers an alga that is marine, multicellular, and lives at a depth reached only by blue light. This alga probably belongs to which group?