Practice Questions

TLS Online TPP Program

#Question id: 12908

Which statement is incorrect about CRISPR?

#Unit 13. Methods in Biology

It was first identified as an adaptive immunity pathway in prokaryotes providing resistance to bacteriophage and analogous to the RNA interference process found in eukaryotes.
It does not utilize double-stranded sequence-specific breaks and does not repair using HDR via homologous recombination.
The system consists of two parts, a short synthetic guide RNA ( gRNA) and a nonspecific double-stranded endonuclease termed Cas9.
It is also possible to program Cas9 with multiple guide RNAs to allow multiplex site-specific editing for designing large deletions, inversions and translocations.

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TLS Online TPP Program

#Question id: 14083

#Unit 1. Molecules and their Interaction Relevant to Biology

What components are required for stabilizing DNA double helix

TLS Online TPP Program

#Question id: 12661

#Unit 10. Ecological Principles

In models of sigmoidal (logistic) population growth,

TLS Online TPP Program

#Question id: 24653

#Unit 2. Cellular Organization

Which of the following membrane protein form channel, in the form of gap junctions between cells?

TLS Online TPP Program

#Question id: 31256

#Unit 5. Developmental Biology

If the Wnt signaling inhibitor GSK3 is itself inhibited throughout the body axis in hydra, results

TLS Online TPP Program

#Question id: 217

#Unit 1. Molecules and their Interaction Relevant to Biology

Which substance would make a good ligand for biotin on the matrix of an affinity chromatography column?