Nucleotide Bases

To which carbon of deoxyribose is the nitrogen base bonded?

• Carbon 1

• Carbon 2

• Carbon 3

• Carbon 4

• Carbon 5

Which of the following are found in RNA but not in DNA?

• Deoxyribose sugar and thymine

• Ribose sugar and thymine

• Ribose sugar and uracil

• Deoxyribose sugar and uracil

What type of bonds form between the nucleotide bases of the separate strands of the double stranded helix of DNA?

• Peptide bonds

• Hydrogen bonds

• Covalent bonds

• Basic bonds

What is the meaning of complementary base paring, in DNA structure?

• Nucleotide bases always exist in the same proportions in a DNA molecule.

• Each type of base always pairs with one other type, C with T and A with G.

• This is the idea that nucleotide bases always pair with nucleotide bases.

• Each type of nucleotide base always pairs with just one other type of base, C with G and A with T.

In what ways is RNA different to DNA?

• DNA has uracil and ribose, whereas RNA has thymine and deoxyribose.

• RNA has uracil and is double stranded but DNA has thymine and is single stranded.

• DNA has ribose sugar and is double stranded, whereas RNA has deoxyribose sugar and is single stranded.

• RNA has ribose sugar and is single stranded, whereas DNA has deoxyribose sugar and is double stranded.

Which of the following is a correct drawing of an RNA nucleotide?

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How many carbon atoms are there in a ribose and a deoxyribose sugar molecule?

• Six

• Five

• Three

• Eight

Sometimes DNA is referred to as a "polymer of nucleotides". What does this mean?

• DNA is the 'glue' which sticks nucleotides together.

• DNA is a long chain of nucleotide monomers.

• DNA is a nucleotide made from many parts.

• DNA is found in the nucleus of many cells.

What is the monomer of DNA and RNA?

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