Lesson Worksheet: Nucleic Acids Biology

In this worksheet, we will practice describing the structure of nucleotides and nucleic acids and outlining their importance in living organisms.

Q1:

A list of bonds found in biological molecules is provided.

  1. Hydrogen
  2. Peptide
  3. Phosphodiester
  4. Ionic
  5. Glycosidic

Which of these bonds is found between complementary base pairs in DNA?

  • AIonic
  • BGlycosidic
  • CPhosphodiester
  • DHydrogen
  • EPeptide

Q2:

A list of bonds found in biological molecules is provided.

  1. Hydrogen
  2. Peptide
  3. Phosphodiester
  4. Ionic
  5. Glycosidic

Which of these bonds is found between adjacent nucleotides in a DNA double helix?

  • AGlycosidic
  • BPeptide
  • CIonic
  • DPhosphodiester
  • EHydrogen

Q3:

Which of the following statements correctly links nucleotides and nucleic acids?

  • AA nucleic acid is a polymer made of many repeating nucleotide monomers.
  • BA nucleotide is a polymer made of many repeating nucleic acid monomers.

Q4:

Nucleic acids are polymers. What are the monomer units of nucleic acids?

  • ARibose sugars
  • BNucleosomes
  • CChromosomes
  • DNucleotides
  • EPhosphates

Q5:

Which of the following correctly describes the base pairing that occurs in DNA?

  • ACytosine binds to guanine and adenine binds to thymine.
  • BCytosine binds to adenine and guanine binds to thymine.
  • CCytosine binds to thymine and adenine binds to guanine.
  • DAll of the bases can bind to any other base.

Q6:

What type of bond forms between complementary base pairs in DNA?

  • AHydrogen
  • BIonic
  • CPhosphodiester
  • DPeptide
  • EBasic

Q7:

Which of the following is not an adaptation that DNA has in order to carry out its primary functions?

  • ADNA is a relatively large molecule and can carry a lot of information.
  • BDNA is very stable, so it can be passed from generation to generation with changes being rare.
  • CDNA has a strong sugar–phosphate backbone to provide support and protection.
  • DThe hydrogen bonds joining bases together can be easily separated to allow DNA replication.
  • EDNA usually exists as a single strand, ready to be replicated and passed on.

Q8:

Which of the following cannot be used to describe the structure of DNA?

  • ADNA forms a double-helix shape.
  • BIn DNA, adenine binds to uracil, and cytosine binds to guanine.
  • CThe backbone of DNA is formed from sugar and phosphate molecules.
  • DThe complementary bases in DNA are held together by hydrogen bonds.

Q9:

The diagram provided shows a simplified outline of the structure of a single DNA nucleotide.

What structure is represented by the letter Y?

  • ARibose
  • BDeoxyribose
  • CPhosphate group
  • DGlycerol

What structure is represented by the letter X?

  • AGlycerol
  • BPhosphate group
  • CDeoxyribose
  • DRibose

Q10:

Which of the following is a nitrogenous base that is not found in DNA?

  • AThymine
  • BAdenine
  • CCytosine
  • DUracil
  • EGuanine

This lesson includes 24 additional questions and 6 additional question variations for subscribers.

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