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Chapter 17 BIO 111, (2 of 3)

Across
After synthesis of the eukaryotic primary RNA transcript, the removal of portions of the transcript (introns-left behind in the nucleus)will not be included in transport to cytoplasm. Also, the joining of the exons (remaining portions) for transport.
Modification of RNA primary transcripts, including splicing out of introns, joining together of entrons and the alteration of the 5' and 3' ends.
A sequence of 50-250 adenine nucleotides added onto the 3' end of a pre-mRNA molecule to protect it from degradation. (by hydrolytic enzymes.) AAA:AAA:AAA
Complex of transcription factors and RNA polymerase II bind to the promoter.
A discrete structural and functional region of a protein. Also, a taxonomic category above a kingdom level. The three domains are Archaea, Bacteria and Eukarya.
Noncoding segments of nucleic acids that lie between coding regions on DNA/RNA strands are also called intervening sequences.
A sequence within a primary transcript that remains in the RNA after RNA processing; also refers to the DNA region from which this sequence was transcribed.
Down
A regulatory protein that binds to DNA and affects transcription of specific genes.
A modified form of guanine molecule nucleotide added onto the 5' end of a pre-mRNA molecule. Helps in exiting nucleus and helps ribosomes to attach to the 5'end in cytoplasm G-P-P-P
Signals end (STOP) pre-mRNA is cut and released when this appears and poly A-tail is added.
Refers to alternative RNA splicing. A type of eukaryotic gene regulation at the RNA-processing level in which different mRNA molecules are produced from the same primary transcript, depending on which RNA segments are treated as exons and which as introns.
A large complex made up of proteins and small RNA molecules that splices RNA by interacting with the ends of a RNA intron, releasing the intron and rejoining the exons.
An RNA molecule that functions as an enzyme; such as an intron that catalyzes its own removal during RNA splicing.
A DNA sequence in eukaryotic promoters crucial in forming the transcription initiation complex.
Untranslated regions of the mRNA at the 5' and 3'. Don't translate to protein. Downstream from cap and upstream from poly A-tail. Help bind to ribosomes. They are part of the exons.