Practice Questions

TLS Online TPP Program

#Question id: 7154

Cancer is believed to often arise from stem cells, rather than fully differentiated cells. Which of the following are consistent with this view?

#Part-B Specialized Branches in Biotechnology

Stem cells are actively dividing and express few differentiated functions, so they may have fewer changes to undergo than do fully differentiated cells in becoming cancer cells.
DNA replication is necessary for mutations to occur, and stem cells are replicating their DNA whereas differentiated cells are for the most part not replicating their DNA.
Teratocarcinomas are tumors that arise from germ cells or embryonic stem (ES) cells, under certain circumstances, demonstrating that tumors can arise from stem cells without further mutation.
All of the above are reasons that cancer cells may more readily arise from stem cells than from fully differentiated cells.

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TLS Online TPP Program

#Question id: 2939

#Part-A Aptitude & General Biotechnology

Failure of which cell-cycle checkpoint is most likely to result in non-dysjunction?

TLS Online TPP Program

#Question id: 5740

#Part-A Aptitude & General Biotechnology

Pollen from one species germinates on the stigma of another related species and sexually fertilizes the ovule. Most of the resulting plants are sterile but some of the resulting offspring undergo chromosome duplication resulting fertile plants. The fertile offspring are known as

TLS Online TPP Program

#Question id: 318

#Part-A Aptitude & General Biotechnology

Attractions of oppositely charged functional groups of proteins are sometimes called ________.

TLS Online TPP Program

#Question id: 11295

#Part-B Specialized Branches in Biotechnology

The amount of energy entering a food chain depends on the

TLS Online TPP Program

#Question id: 14538

#Part-B Specialized Branches in Biotechnology

The following plot shows a function y which varies linearly with x. The value of the integral