In which of the following environments would there be the greatest need for osmoregulation?

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#Question id: 12369

#Unit 1. Molecules and their Interaction Relevant to Biology

Phosphoric acid attachment occur to ribose or deoxyribose at

A. C3 during phosphodiester bond formation

B. C5 during nucleotide formation

C. C2 during phosphodiester bond formation

D. C1 during nucleotide formation

Which of the combinations contains all incorrect statements?

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#Question id: 18902

#Unit 13. Methods in Biology

which of the following radioactive element Used to treat cancerous tumours

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#Question id: 12251

#Unit 10. Ecological Principles

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: 7130

#Unit 5. Developmental Biology

Hematopoietic stem cells can be isolated and grown in culture; if one wished to control their differentiation into either neutrophils or macrophages, what colony stimulating factors could be used?

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#Question id: 4028

#Unit 3. Fundamental Processes

Which one of the following terms is used to describe the protein:DNA complex containing several transcription factors bound to a single enhancer?