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polynucleotide
What polymer is formed from mononucleotides?
deoxyribose sugar, phosphate, nitrogenous base
3 components of a mononucleotide
They are held in pairs by hydrogen bonds
Why do the bases point inwards in the double helix?
-DNA is double-stranded, whereas RNA is single stranded
-DNA contains deoxyribose sugar whereas RNA contains ribose sugar
-DNA contains thymine bases whereas RNA contains uracil bases
Describe the differences between the structure of DNA and the structure of RNA (3)
-both contain nucleotides
-both contain phosphodiester bonds and have hydrogen bonds between bases
-DNA is double stranded and double helix whereas tRNA is single stranded and folded
-DNA contains deoxyribose/thymine whereas tRNA contains ribose/uracil
-tRNA has a specific amino acid binding site whereas DNA does not
Compare and contrast the structure of a DNA double helix with the structure of tRNA
-Double stranded helix
-Phosphate and deoxyribose sugar backbone
-Joined by phosphodiester bonds
-A-T and C-G held together by hydrogen bonds
Describe the structure of DNA (4)
-DNA is double stranded whereas mRNA is single stranded
-DNA has deoxyribose sugar whereas mRNA has ribose sugar
-DNA has A-T and C-G bases, whereas mRNA has A-U and C-G bases
-Both DNA and mRNA have phosphodiester bonds
Compare and contrast DNA structure to mRNA structure (4)
No
Is DNA single stranded in bactera?
Note 
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