DNA Structure and Function

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Questions and Answers

What is the difference in sugar composition between RNA and DNA?

  • RNA contains deoxyribose sugar, while DNA contains ribose sugar
  • RNA contains ribose sugar, while DNA contains deoxyribose sugar (correct)
  • RNA contains thymine, while DNA contains uracil
  • RNA contains adenine, guanine, cytosine, and uracil, while DNA contains adenine, guanine, cytosine, and thymine

What is the structure of DNA in terms of helix and strands?

  • DNA is single helix with two strands
  • DNA is double helix with two strands (correct)
  • DNA is double helix with one strand
  • DNA is single helix with one strand

Why does a DNA chain have polarity?

  • The percentage of A always equals the percentage of T, leading to polarity in DNA
  • The terminal nucleotide at one end has a free 5Í´ group, and the other end has a 3Í´ group, resulting in polarity (correct)
  • DNA's helical structure causes it to have polarity
  • DNA's interaction with histone proteins creates polarity

Where does messenger RNA (mRNA) function within the cell?

<p>From the nucleus to the ribosomes in the cytoplasm (A)</p> Signup and view all the answers

What is the function of ribosomal RNA (rRNA)?

<p>Makes up the ribosomes where polypeptides are synthesized (B)</p> Signup and view all the answers

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