In DNA, nitrogenous bases occur in complementary pairs - Leaving Cert Biology - Question 6 - 2013
Question 6
In DNA, nitrogenous bases occur in complementary pairs. Explain the term complementary as used here.
In each case, name the complementary base in RNA for:
1. Adenin... show full transcript
Worked Solution & Example Answer:In DNA, nitrogenous bases occur in complementary pairs - Leaving Cert Biology - Question 6 - 2013
Step 1
Explain the term complementary as used here
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Answer
In the context of DNA, the term 'complementary' refers to the specific pairing of nitrogenous bases through hydrogen bonds, where each base has a corresponding or matching base. For instance, adenine pairs with thymine (or uracil in RNA), and cytosine pairs with guanine.
Step 2
In each case, name the complementary base in RNA for:
1. Adenine
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Uracil (U)
Step 3
In each case, name the complementary base in RNA for:
2. Cytosine
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Guanine (G)
Step 4
Name a carbohydrate that is a component of nucleotides.
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Ribose or Deoxyribose
Step 5
Name a component of a nucleotide that is neither a carbohydrate nor a nitrogenous base.
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Phosphate group (or P)
Step 6
What does the 'm' stand for in mRNA?
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Messenger
Step 7
Give one difference between RNA and DNA, other than the nitrogenous bases.
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RNA is single-stranded, whereas DNA is double-stranded.
Step 8
Give the role of the enzyme RNA polymerase.
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RNA polymerase joins nucleotides together to synthesize mRNA, or to make RNA.
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