DNA and RNA

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What are the three main parts of a nucleotide?
The pentose sugar, organic base and phosphate group
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What is the term relating to a large chain of nuleotides?
A Polynucleotide
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Which type of bond forms between the pentose sugar and the phosphate group?
An ester bond
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Which type of bond forms between the pentose sugar and the organic base?
A hydrogen bond
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When a polynucleotide is formed, what type of bond is formed between one phosphate group and a pentose sugar (one pentose sugar and two phosphate groups)?
A phosphodiester bond
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The resulting combined chain of the pentose sugar and phosphate group is called a...?
Sugar-Phosphate Backbone
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DNA is a...?
Double helix
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RNA is a...?
Single helix
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What are the four base names for DNA?
Adenine, Thymine, Cytosine and Guanine
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What are the four base names for RNA?
Adenine, Uracil, Cytosine and Guanine
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How many hydrogen bonds form between Adenine and Thymine?
Two
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How many hydrogen bonds form between Cytosine and Guanine?
Three
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What is the name of the pentose sugar in DNA?
Deoxyribose
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What is the name of the pentose sugar in RNA?
Ribose
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In a helix of DNA, the two strands run...?
Antiparallel
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RNA always forms a...?
Single polynucleotide strand
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If (in a helix of DNA) there were 72 bases (36 base pairs) and 11 of these were Thymine, how many were Cytosine?
25
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DNA strands are long, whilst RNA strands are always...?
Shorter
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Meselson-Stahl proved that DNA replicates through...?
Semi-conservative replication
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Meselson-Stahl used a lighter Nitrogen 14 isotope and a heavier (...?) isotope to prove that conservative replication occured.
Nitrogen 15
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If DNA replication is semi-conservative, the centrifuge pellet will form in the...?
Centre of the test-tube.
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Which enzyme "unzips" the DNA?
DNA Helicase
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Which enzyme reforms the new DNA?
DNA Polymerase
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DNA polymerase always moves down the DNA in a...?
'3 '5 direction
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In eukaryotic cells, how is DNA stored?
In the nucleus, coiled round histones; forming chromosomes
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In prokaryotic cells, how is DNA stored?
Supercoiled; forming plasmids
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Other cards in this set

Card 2

Front

What is the term relating to a large chain of nuleotides?

Back

A Polynucleotide

Card 3

Front

Which type of bond forms between the pentose sugar and the phosphate group?

Back

Preview of the front of card 3

Card 4

Front

Which type of bond forms between the pentose sugar and the organic base?

Back

Preview of the front of card 4

Card 5

Front

When a polynucleotide is formed, what type of bond is formed between one phosphate group and a pentose sugar (one pentose sugar and two phosphate groups)?

Back

Preview of the front of card 5
View more cards

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