BCMB 412 - Quiz 3 With Complete
Questions And Answers
What is the difference between ribose and deoxyribose? - ANSWER Sugar - Ribose vs
Deoxyribose
Strands - Single vs Double
Bases - Uracil vs Thymine
Structure - Ribose has OH while Deoxyribose has H
The phosphodiester bonds in DNA are the same as those in RNA
Meselson and Stahl Experiment - ANSWER Used isotope of nitrogen to change the
weight of DNA N15 & N14, demonstrated that the semi-conservative model is the best
description of replication (Where DNA molecules are all heavy)
Distribution model has results where the DNA molecules are all intermediate and align
in the middle of the tube
Conservative model has results where the DNA molecules are half intermediate, half
heavy and are located at the top and bottom of the tube.
Major functions/roles that RNA molecules perform in the cell - ANSWER Intermediate
genetic information: mRNA
Adaptor for translation of mRNA into proteins: tRNA
Structural role in ribosomes: rRNA
Regulatory role: RNAi interference with translation and transcription. Non-coding RNA
can determine chromatin structure.
Questions And Answers
What is the difference between ribose and deoxyribose? - ANSWER Sugar - Ribose vs
Deoxyribose
Strands - Single vs Double
Bases - Uracil vs Thymine
Structure - Ribose has OH while Deoxyribose has H
The phosphodiester bonds in DNA are the same as those in RNA
Meselson and Stahl Experiment - ANSWER Used isotope of nitrogen to change the
weight of DNA N15 & N14, demonstrated that the semi-conservative model is the best
description of replication (Where DNA molecules are all heavy)
Distribution model has results where the DNA molecules are all intermediate and align
in the middle of the tube
Conservative model has results where the DNA molecules are half intermediate, half
heavy and are located at the top and bottom of the tube.
Major functions/roles that RNA molecules perform in the cell - ANSWER Intermediate
genetic information: mRNA
Adaptor for translation of mRNA into proteins: tRNA
Structural role in ribosomes: rRNA
Regulatory role: RNAi interference with translation and transcription. Non-coding RNA
can determine chromatin structure.
