A bacterial histidine mutant was plated on minimal medium and a single colony grew. You decide to sequence the histidine biosynthetic gene of the revertant and discover that the original mutation is still present.  This colony must have been able grow due to a

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#Question id: 3880

#XL - Q Biochemistry

Which one of the following properties of the L-19 IVS ribozyme is not shared with enzymes that are purely protein?

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#Question id: 3882

#XL - Q Biochemistry

The reverse transcriptase of an animal RNA virus catalyzes:

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#Question id: 3883

#XL - Q Biochemistry

Which of the following is correct about reverse transcriptase:

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#Question id: 3884

#XL - Q Biochemistry

Compared with DNA polymerase, reverse transcriptase: 

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#Question id: 3886

#XL - Q Biochemistry

Which one of the following statements about the reverse transcriptases of retroviruses and the RNA replicases of other single-stranded RNA viruses, such as R17 and influenza virus, is correct?

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#Question id: 3887

#XL - Q Biochemistry

Aptamers are