Practice Questions

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#Question id: 15543

In Benzer's intragenic mapping experiments, what event was required to allow production of infectious phage from rII mutants?

#Unit 8. Inheritance Biology

rII mutant strains with mutations in different genes.
Homologous recombination between phage.
Crossover Within the mutant gene, between the mutation.
Crossover at one end of the mutant gene, outside the mutation.

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TLS Online TPP Program

#Question id: 5659

#Unit 5. Developmental Biology

Following are the statements related to mammalian chaemotaxis .
A. During chaemotaxis, the oocyte and its accompanying cumulus cells secrete molecules that attract only uncapacitated sperm toward the egg during the last stages of sperm migration.
B. These chaemotactic compound are hormone progesterone, which is made by the cumulus cells.
C. Progesterone has been shown to bind to a receptor that activates Ca2+ channels in the cell membrane of the sperm tail, leading to sperm hyperactivity and provides directional cue.
D. Cumulus cells also secrete a substance, CRISP1, that attracts sperm and hyperactivates them through CatSper channels similar as in sea urchins.
Which of the following statement is incorrect?

TLS Online TPP Program

#Question id: 10266

#Unit 8. Inheritance Biology

Self-pollination is the transfer of pollen from the anther of a flower to the stigma:

TLS Online TPP Program

#Question id: 23399

#General Aptitude

What will be the next term in the following? DCXW, FEVU, HGTS,?

TLS Online TPP Program

#Question id: 21119

#Unit 12. Applied Biology

The electrochemical biosensors are categorised into _________________ types?