AQA A-level Biology - Topic 1B - DNA
and RNA Questions & Answers
What are DNA and RNA both types of? - ANSWERSNucleic acid
What is DNA used for? - ANSWERSTo store genetic information
What is RNA used for? - ANSWERSTo transfer genetic information from the DNA to the
ribosomes
What do ribosomes do? - ANSWERSRibosomes are the bodies 'protein factories'- they
read the RNA to make polypeptides in a process called translation
What are DNA and RNA polymers of? - ANSWERSNucleotides
What is a nucleotide? - ANSWERSIt is a type of biological molecule made from a
pentose sugar, a nitrogen-containing organic base and a phosphate group
Why are nucleotides so important? - ANSWERSBecause they are the monomers that
make up DNA and RNA
What is the sugar in DNA called? - ANSWERSDeoxyribose
What part of the nucleotides in DNA can vary? - ANSWERSThe organic bases- they
can be A, T, C or G
What is the sugar in RNA called? - ANSWERSRibose
What is different about the base in RNA? - ANSWERSIt can still vary- but it is one of A,
U, C or G, no T
What do nucleotides join together to form? - ANSWERSPolynucleotides via a
condensation reaction in which the phosphate group of one bonds with the sugar of
another, creating a phosphodiester bond
and RNA Questions & Answers
What are DNA and RNA both types of? - ANSWERSNucleic acid
What is DNA used for? - ANSWERSTo store genetic information
What is RNA used for? - ANSWERSTo transfer genetic information from the DNA to the
ribosomes
What do ribosomes do? - ANSWERSRibosomes are the bodies 'protein factories'- they
read the RNA to make polypeptides in a process called translation
What are DNA and RNA polymers of? - ANSWERSNucleotides
What is a nucleotide? - ANSWERSIt is a type of biological molecule made from a
pentose sugar, a nitrogen-containing organic base and a phosphate group
Why are nucleotides so important? - ANSWERSBecause they are the monomers that
make up DNA and RNA
What is the sugar in DNA called? - ANSWERSDeoxyribose
What part of the nucleotides in DNA can vary? - ANSWERSThe organic bases- they
can be A, T, C or G
What is the sugar in RNA called? - ANSWERSRibose
What is different about the base in RNA? - ANSWERSIt can still vary- but it is one of A,
U, C or G, no T
What do nucleotides join together to form? - ANSWERSPolynucleotides via a
condensation reaction in which the phosphate group of one bonds with the sugar of
another, creating a phosphodiester bond
