Genetics Braun

2. A secondary structure at the cleavage site that viroids and virusoids undergo during self-cleavage.
3. Process which the 5' terminus generated at the end of the intron simultaneously transesterificates to become linked by a 2'-5' bond to a base within the intron.
5. This type of bond makes up the sugar-phosphate backbone of DNAl It is also involved in branching during mRNA.
6. The sequences that are removed from a mature protein.
10. A classic mode of transcription control in bacteria where a repressor protein prevents a gene from being expressed. (Two words with a "_" between them.
13. Infectious RNA molecules that function independently without encapsidation by any protein coat.
15. Code: pre-mrna mRNA with introns still embedded in the code.

1. Occurs when a single gene gives rise to more than one mRNA sequence.(Two words with a "_" between them)
4. Group I and group II introns can participate in ___-____ where they can excise themselves. (hyphen)
7. The sequences that are represented in the mature protein.
8. DNA to RNA to polypeptide. (Two words with a "_" between them)
9. DNA sequences that are initially transcribed but then excised during when mRNA ages.
11. ________ RNA that contains a sequence that is complementary to the correctly edited mRNA.
12. An enzyme that lowers activation energy and jump starts a chemical reaction.
14. the RNA sequence is read from _____ to ____ end don't forget the "'".