Find the incorrect statement.

Easy

A

Attachment of σ factor to the core enzyme or RNA polymerase increases the enzyme’s affinity for promoter sites in DNA.
B

In capping, an unusual nucleotide (methyl guanosine triphosphate) is added to the 5' end of hnRNA.
C

UGA, UAG, AUG are the stop codons.
D

A molecule that can act as a genetic material must be structurally and chemically stable.

Solution

UAA, UAG, UGA are the stop codons. AUG is the initiator codon.
The methylguanosine cap at the 5’ end of an mRNA serves several functions: it prevents the 5’ end of the mRNA from being digested by exonucleases, it aids in transport of the mRNA out of the nucleus, and it plays an important role in the initiation of mRNA translation.
Attachment of σ factor to the core enzyme increases the enzyme’s affinity for promoter site in DNA and decreases its affinity for DNA in general. As a result, the complete enzyme is thought to slide freely along the DNA until it recognizes and binds to a suitable promoter region.

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