Many temperate lakes develop pronounced thermal stratification during the summer months. In which zone of such lakes does temperature change most rapidly with depth?

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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