When the spliceosome binds to the primary transcript shown above, it can attach Select one: O a. to the exons O b. to the 5' UTR O c. to the 3' UTR O d. at certain sites along an intron

In eukaryotes, why is the initial RNA transcript usually longer than the mature mRNA molecule? Group of answer choices Because a guanosine cap has to be removed Because exons have to be removed Because a poly-A tail has to be removed Because introns have to be removed Because the RNA primer has to be removed

Find the events from prokaryotic translation from the list below and list them below in order, by letter, from earliest to latest during translation A. Incoming tRNA occupies the A-site B. Small ribosome binds to Shine Dalgarno sequence C. 5’ methyl cap binds small ribosome D. Large ribosome subunit binds the small ribosome subunit E. P-site tRNA peptide is attached to the amino acid of the A-site tRNA. F. f-Met tRNA binds to P site G. Small ribosomal subunit binds mRNA H. Peptide released from complex.

Describe three (3) ways in which the primary transcript is modified as it is converted to mRNA.

Define (whether post-transcriptional, post-translational, transcription) and describe the regulation of the Ferretin mRNA in the diagram below.

1. (a) By binding one L-tryptophan molecule/monomer, the trp repressor binds to DNA to sup- press synthesis of L-tryptophan in E. coli. Below is the amino acid sequence of the helix - reverse turn - helix region of the trp repressor that binds to DNA compared to the sequence of the corresponding DNA binding motif of the Prl protein. A diagram of the trp repressor dimer is also shown. Trp Prl Trp Prl 80 -Gly-Glu-Met-Ser-Gln-Arg-Glu-Leu-Lys-Asn-Glu-Leu-Gly-Ala-Gly-Ile- -Ser-Glu-Glu-Ala-Lys-Glu-Glu-Leu-Ala-Lys-Lys-Cys-Gly-Ile-Thr-Val- trp helix 5 70 trp helix 4 Prl helix 80 Prl helix Ala-Thr-Ile-Thr-Arg-Gly-Ser-Asn-Ser-Leu-Lys-Ala-Ala- Ser-Gln-Val-Ser-Asn-Trp-Phe-Gly-Asn-Lys-Arg-Ile-Arg- reverse turn 90 Comparing the two protein sequences above, identify all amino acid pairs that differ in electrostatic charge due to proton dissociable groups (assume pH 7). Indicate the charge of both residues for each such pair. (b) Circle the pair of residues for which the electrostatic charge due to…

Transcription in prokaryotic cells O A. is initiated at a promoter and uses only one strand of DNA (the template strand) to synthesize a complementary RNA strand. B. occurs in the nucleus, whereas translation occurs in the cytoplasm. C. is terminated at a stop codon. D. does not need a promoter. O E. is initiated at a start codon with the help of initiation factors and the small subunit of the ribosome. 5

Choose the item in column 2 that best matches each item in column 1. A. Provides information for production of protein B. Binds to promoter C. Promoter has a box A and box B consensus sequences D. Autocatalytic RNA molecules E. Associated with transcription termination F. Polymerization of ribonucleotides to form RNA molecules G. 7-methyl guanosine H. MRNA prior to processing select - 1. Core RNA polymerase select 2. rho (p) factor select 3. hnRNA select - 4. RNA select -5. RNA polymerase holoenzyme select 6. Ribozymes select - 7. 5' MRNA cap select 8. MRNA