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TLS Online TPP Program

#Question id: 1530

What are the differences and similarities between the transforming genes of retroviruses and those of DNA tumor viruses?

#Unit 4. Cell Communication and Cell Signaling

  1. The oncoproteins encoded by transducing retroviruses are derived from viral replication, whereas those encoded by DNA viruses are derived from normal cell proteins. Both types of viruses express oncoproteins from integrated genomes.

  2. The oncoproteins encoded by transducing retroviruses are derived from normal cell proteins, whereas those encoded by DNA viruses are required for viral replication. Both types of viruses express oncoproteins from integrated genomes.

  3. There is no difference between the transforming genes of retroviruses and DNA tumor viruses. Both types of viruses express oncoproteins from integrated genomes.

  4. The oncoproteins encoded by transducing retroviruses are derived from normal cell proteins, whereas those encoded by DNA viruses are required for viral replication. There is no similarities in both types of viruses.

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TLS Online TPP Program

#Question id: 16965

#Unit 9. Evolution & Diversity of Life Forms

In an adaptive radiation, numerous related lineages arise in a relatively short time and evolve in many different directions as they adapt to different habitats or ways of life. Radiation, rather than directional trends, is perhaps the most common pattern of long-term evolution. Which statements is not true for adaptive radiation?
TLS Online TPP Program

#Question id: 16966

#Unit 9. Evolution & Diversity of Life Forms

CCR5 that plays a role in inflammatory response. Unfortunately, this protein is also a key to human immunodeficiency virus (HIV) infection. The virus binds to a loop of the CCR5 protein and then enters the cell. Some people have an allele called Δ32 at the CCR5 locus in which 32 bp are deleted. The missing part of the gene codes for the loop in the protein to which the virus attaches. Which statements is true for CCR5?
TLS Online TPP Program

#Question id: 16967

#Unit 9. Evolution & Diversity of Life Forms

Homoplasy,
TLS Online TPP Program

#Question id: 16968

#Unit 9. Evolution & Diversity of Life Forms

Parallel evolution is a term that has been used to describe cases in which independent evolution of a character state is thought to have similar genetic and developmental bases, especially in closely related species. Which statements is true for
TLS Online TPP Program

#Question id: 17072

#Unit 13. Advances in Biotechnology

Plastic Film, Teflon (fluoroethylenepropylene copolymer) is biologically inert and are extensively used for monolayer and suspension cultures as thry are
TLS Online TPP Program

#Question id: 17073

#Unit 13. Advances in Biotechnology

Hypoxanthine is converted into guanine by the enzyme HGPRT an enzymes of the salvage pathway. What does HGPRT stands for?