BIO 311 EXAM 1 QUESTIONS AND ANSWERS | BIOLOGY EXAM PREP & STUDY GUIDE 2026/2027

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BIO 311 EXAM 1 QUESTIONS AND ANSWERS | BIOLOGY EXAM PREP & STUDY
GUIDE 2026/2027

transcription direction - ANS ✔✔3'-5'

inverted repeats - ANS ✔✔makes hairpin shape RNA with series of uracils at end (U and A
causes instability, which breaks off RNA)

Shine-Dalgarno sequence - ANS ✔✔a sequence in bacterial mRNAs that functions as a
ribosomal binding site

RNA polymerase I - ANS ✔✔All eukaryotes. Transcribes large rRNAs

RNA Polymerase II - ANS ✔✔pre-mRNA, some snRNAs, snoRNAs, some miRNAs

RNA Polymerase III - ANS ✔✔tRNAs, small rRNAs, some snRNAs, some miRNAs

Ribsomal RNA (rRNA) - ANS ✔✔cytoplasm, structural and functional components of ribosome

Messenger RNA (mRNA) - ANS ✔✔Carries genetic code for proteins

Transfer RNA (tRNA) - ANS ✔✔helps incorporate amino acids into polypeptide chain

pre-messenger RNA (pre-mRNA) - ANS ✔✔precursor mRNA

small nuclear RNA (snRNA) - ANS ✔✔processing of pre-mRNA

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