BBL FINAL EXAM QUESTIONS AND
VERIFIED ANSWERS|100%
CORRECT|GRADE A+
Small nuclear RNA [snRNA]: size [nucleotides] and function - ANSWER Less than 300. Components of
RNA splicing machinery.
Small nucleolar RNA [snoRNA]: size [nucleotides] and function - ANSWER Less than 300. rRNA biogenesis
and modification
MicroRNA [miRNA]: size [nucleotides] and function - ANSWER 20-25. Regulates use of mRNA.
Small interfering RNA [siRNA]: size [nucleotides] and function - ANSWER 20-25. Antiviral defense mRNA
degradation.
Piwi-interacting RNA [piRNA]: size [nucleotides] and function - ANSWER 29-30. Gene regulation.
Long noncoding RNA [lncRNA]: size [nucleotides] and function - ANSWER Greater than 200. Gene
regulation.
alpha subunit: number, mass [kd], function - ANSWER 2. 37. Required for assembly of core enzyme;
interacts with regulatory factors.
beta subunit: number, mass [kd], function - ANSWER 1. 151. Takes part in all stages of catalysis.
beta prime subunit: number, mass [kd], function - ANSWER 1. 151. Binds to DNA; takes part in catalysis.
omega subunit: number, mass [kd], function - ANSWER 1. 10. Required to restore denatured polymerase
to its native form.
sigma 70 subunit: number, mass [kd], function - ANSWER 1. 70. Takes part in promoter recognition.
VERIFIED ANSWERS|100%
CORRECT|GRADE A+
Small nuclear RNA [snRNA]: size [nucleotides] and function - ANSWER Less than 300. Components of
RNA splicing machinery.
Small nucleolar RNA [snoRNA]: size [nucleotides] and function - ANSWER Less than 300. rRNA biogenesis
and modification
MicroRNA [miRNA]: size [nucleotides] and function - ANSWER 20-25. Regulates use of mRNA.
Small interfering RNA [siRNA]: size [nucleotides] and function - ANSWER 20-25. Antiviral defense mRNA
degradation.
Piwi-interacting RNA [piRNA]: size [nucleotides] and function - ANSWER 29-30. Gene regulation.
Long noncoding RNA [lncRNA]: size [nucleotides] and function - ANSWER Greater than 200. Gene
regulation.
alpha subunit: number, mass [kd], function - ANSWER 2. 37. Required for assembly of core enzyme;
interacts with regulatory factors.
beta subunit: number, mass [kd], function - ANSWER 1. 151. Takes part in all stages of catalysis.
beta prime subunit: number, mass [kd], function - ANSWER 1. 151. Binds to DNA; takes part in catalysis.
omega subunit: number, mass [kd], function - ANSWER 1. 10. Required to restore denatured polymerase
to its native form.
sigma 70 subunit: number, mass [kd], function - ANSWER 1. 70. Takes part in promoter recognition.
