A plant produces flowers that are open through the day and the night. An experimenter places pollen on the stigmas of freshly opened flowers and covers them after pollination to prevent natural pollinators from having access to the flowers. When experimental pollination was carried out during the day, 40% of the flowers yielded fruit. When experimental pollination was carried out during the night, 80% of the flowers yielded fruit. However, when flowers were  kept  open  to  natural  pollination  during  the  day  (covered  at  night),  35%  of  flowers  produced  fruit.  20%  of flowers exposed to natural pollination during the night (covered during the day) produced fruit. Which of the following statements is NOT a plausible explanation of these results ?

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#Question id: 18834

#Unit 13. Methods in Biology

A researcher is trying to alter five successive base pairs in the middle of a PCR amplified DNA fragments. Which technique is the most recommended for performing such experiment? 

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#Question id: 18835

#Unit 13. Methods in Biology

Polymerase chain reaction (PCR) utilizes a heat-stable polymerase (Taq polymerase) to amplify DNA strand. Which of the statement best describes why thermo-stable polymerases are required for PCR?

TLS Online TPP Program

#Question id: 18836

#Unit 13. Methods in Biology

Which of the following is/are not a component of a polymerase chain reaction mixture?

TLS Online TPP Program

#Question id: 18842

#Unit 13. Methods in Biology

Which of the following is in the correct order regarding DNA extraction 

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#Question id: 18843

#Unit 13. Methods in Biology

Which of the following reagent is used for quantifying DNA

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#Question id: 18844

#Unit 13. Methods in Biology

In the extraction of DNA from cell with to remove the high protein content from the cell , before phenol treatment which of the following treatment is done