Practice Questions

TLS Online TPP Program

#Question id: 12570

Extinction is a natural phenomenon. It is estimated that 99% of all species that ever lived are now extinct. Why then do we say that we are now in a biodiversity crisis?

#Unit 10. Ecological Principles

Humans are ethically responsible for protecting endangered species.
Scientists have finally identified most of the species on earth and are thus able to Quantify the number of species becoming extinct.
The current rate of extinction is high and human activities threaten biodiversity at all levels.
Humans have greater medical needs than at any other time in history, and many potential medicinal compounds are being lost as plant species become extinct.

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TLS Online TPP Program

#Question id: 1235

#Unit 4. Cell Communication and Cell Signaling

Arrange the following events in the proper order in which they occur during transduction of the EGF signal:

a. transphosphorylation of the EGF receptor

b. dissociation of GDP from Ras

c. dissociation of Ras from Sos

d. binding of GRB2 to the EGF receptor

e. binding of GTP to Ras

TLS Online TPP Program

#Question id: 5819

#Unit 8. Inheritance Biology

Individuals with Cockayne syndrome are more likely to:

TLS Online TPP Program

#Question id: 1055

#Unit 4. Cell Communication and Cell Signaling

What part of the E. coli T4 phage attaches to the host cell receptors?

TLS Online TPP Program

#Question id: 21135

#Unit 12. Applied Biology

a) Antibiotic production under conditions of nitrogen limitations

b) Synthesize pppGpp in vitro from GTP and ATP

c) Initiating the transcription of Antibiotic Synthesis Genes

d) Antibiotic production under conditions of calcium limitation

e) under limitation condition synthesize secondary metabolism

TLS Online TPP Program

#Question id: 26349

#Unit 2. Cellular Organization

which of the following is compaction associated DNA sequences which are generally located between H1 and H3 binding sites