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#Question id: 4132


In E. coli, aminoacyl-tRNA synthetases:

#SCPH28 | Zoology
  1. activate amino acids in 12 steps

  2. are amino acid–specific; there is at least one enzyme specific for each amino acid.

  3. fall into two classes, each of which attaches amino acids to different ends of the tRNA.

  4. have no proofreading activities.


Answer:- Option(s): 4


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#Question id: 4327

#SCPH28 | Zoology

What would occur if the repressor of an inducible operon were mutated so it could not bind the operator?

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#Question id: 27705

#Research Methodology

Fact is “empirically verifiable observation” --- is defined by

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#Question id: 4314

#SCPH06 I Botany

A researcher introduces double-stranded RNA into a culture of mammalian cells and can identify its location or that of its smaller subsections experimentally, using a fluorescent probe. Some time later, she finds that the introduced strand separates into single-stranded RNAs, one of which is degraded. What does this enable the remaining strand to do?

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#Question id: 10559

#SCPH06 I Botany

which gives water a high tensile strength,

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#Question id: 3654

#SCPH06 I Botany

Cleavage of the cyclobutane ring of pyrimidine dimers by ______________ restores the original DNA structure.

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