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nucleic acids: A level-OCR
Questions on DNA and RNA. SCR- semi conservative replication when naming the catalysts involved in semi conservative replication your answers do not need to be preceded by DNA e.g. helicase NOT DNA helicase
Last updated: January 23, 2021
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January 23, 2021
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What is the sugar in DNA?
what bonds form between the sugar and phosphate group via a condensation reaction?
name a pyrimidine base
name a purine base
What is complimentary to the base adenine in DNA?
how many bonds form between A and T bases?
which strand (parallel or anti parallel) run 3' prime to 5' prime?
what does ATP stand for?
what is the shape DNA is twisted to form?
name the base present in RNA but not DNA
what is the sugar present in RNA?
there are 3 types of RNA; messenger, ribosomal and.....
when attempting to observe DNA, what alcohol is added to form a white precipitate?
why is salt used when attempting to observe DNA?
what is the name given to DNA replication?
semi conservative replication
what catalyst is used in the unwinding of DNA?
what catalyses the breaking of H-bonds between bases?
what catalyses the formation of the new sugar phosphate backbone?
what is the name given to the original strands in SCR?
when investigating SCR, an isotope of what element was used?
sequences of DNA nucleotide bases that code for a polypeptide chain
how many bases make up a codon?
what is the name given to the formation of mRNA?
In SCR 2 strands are used as templates, how many are in the formation of mRNA?
what is the process that occurs when mRNA reaches a ribosome?
the sequence of nucleotide bases determines the sequence of what in the polypeptide?
how many codons would a codon code if a codon could code 1 amino acid?
how many bases fit in a ribosome?
name the anticodon for the codon UAC
what bonds form between the amino acids left behind by the tRNA?
what protein is used to fold the polypeptide chain into its tertiary structure?
what codon hates dogs?
Jan 24, 2021
How can there be an isotope of Nitrogen?
Jan 26, 2021
I believe Meselson and Stahl used N-15 as the heavier isotope; it will sink when centrifuged. Compared to the standard N-14 that will float.
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