Lec2 Flashcards
1
Q
Transcription
What involved
A
isthe first step in gene expression.
copying a gene’s DNA sequence (gene information) to make an
mRNA molecule. In transcription, an mRNA (messenger RNA)
intermediate is transcribed from one of the strands of the DNA
molecule
2
Q
Why RNA CALLED MESSNGER RNA
A
because it carries
the “message,” or genetic information, from the DNA to the
ribosomes, where the information is used to make proteins.
3
Q
Types of RNA POLYMERASE
A
RNA polymerase I: transcribes genes encoding 18S, 5.8S and 28S
ribosomal RNAs
RNA polymerase II: transcribes genes encoding messenger RNA
and certain small nuclear RNAs and microRNA
RNA polymerase III: transcribes genes encoding
transfer RNA, 5s
ribosomal RNAs and other small RNAs.
