Examine the cyclic D-monosaccharide shown below. The ring structure is the ________ and the linear form of this monosaccharide must be a/an ________.

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#Question id: 3860

#XL - Q Biochemistry

Guide RNAs:

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#Question id: 3861

#XL - Q Biochemistry

_ are sequences that are removed from primary transcripts, and _ are sequences that remain present in mature mRNA molecules.

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#Question id: 3862

#XL - Q Biochemistry

The largest gene characterized to date is:

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#Question id: 3863

#XL - Q Biochemistry

Introns in nuclear pre-mRNAs are excised by:

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#Question id: 3868

#XL - Q Biochemistry

The sigma factor of E. coli RNA polymerase: 

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#Question id: 3879

#XL - Q Biochemistry

Which of the following is not usually essential for the catalytic activity of ribozymes?