Worksheet: DNA

In this worksheet, we will practice describing the structure of DNA, and explaining how DNA can be extracted from organic material.

Q1:

A section of DNA contains the order of bases ATGCTTAA. What would the complementary sequence of bases be?

  • ATACGAATT
  • BATCCAATT
  • CTACGGATT
  • DTTCGAATT
  • ETACCAATT

Q2:

What term is given to the shape that DNA forms?

  • ATriple helix
  • BSpiral helix
  • CDouble helix
  • DDouble helicase
  • ESingle helix

Q3:

What term is given to a short section of DNA that may code for a specific protein?

  • ANucleotide
  • BGenome
  • CBase pair
  • DGene
  • EChromosome

Q4:

Which of the following is not an example of a base found in eukaryotic DNA?

  • AG
  • BU
  • CA
  • DC
  • ET

Q5:

The two strands of DNA are held together by complementary base pairs.

In DNA, which other base does C bond to?

  • AA
  • BC
  • CT
  • DG
  • EU

In DNA, which other base does T bond to?

  • AT
  • BU
  • CG
  • DA
  • EC

Q6:

How are the two strands of DNA held together in a double helix shape?

  • ABy strong carbon bonds
  • BBy weak carbon bonds
  • CBy electrostatic attraction
  • DBy weak hydrogen bonds
  • EBy strong hydrogen bonds

Q7:

Which of the following best describes the structure of a nucleotide?

  • AA nucleotide is a small unit made up of a deoxyribose sugar, a phosphate group, and a base (either A, T, G, or C).
  • BA nucleotide is a small unit made up of the four base pairs joined together by hydrogen bonds.
  • CA nucleotide is a large subunit made up of a phosphate-sugar group.
  • DA nucleotide is a small unit that joins with other nucleotides to form a long chain.
  • EA nucleotide is a small unit made up of a glucose sugar, a phosphate group, and a base pair.

Q8:

What term is given to all of the DNA in an organism?

  • AGenomics
  • BGenome
  • CGenes
  • DChromosome
  • EPhenotype

Q9:

The four bases in DNA are often called A, T, G, and C.

What does A stand for?

  • AAdenine
  • BAdenocyte
  • CAdenose
  • DAdenil

What does T stand for?

  • AThymine
  • BThyroxine
  • CThytomine
  • DThyroide

What does C stand for?

  • ACytoplasm
  • BCytosine
  • CCymine
  • DCytocrine

What does G stand for?

  • AGuatamine
  • BGuamine
  • CGuanine
  • DGuanone

Q10:

Which of the following statements best explains why DNA can be described as a polymer?

  • ADNA is formed of many unconnected units.
  • BDNA is formed of many similar units (nucleotides) that are joined in a chain.
  • CDNA forms a double helix shape.
  • DDNA is formed of many different units (nucleotides) that are joined in a chain.
  • EDNA is formed of a few repeating units.

Q11:

The given diagram shows a section of DNA.

What structure is represented by label 1?

  • ASugar-phosphate backbone
  • BHydrogen bonds
  • CDouble helix
  • DNucleotides
  • EA base

What structure is represented by label 2?

  • AHydrogen bonds
  • BDouble helix
  • CSugar-phosphate backbone
  • DA base
  • ENucleotides

What structure is represented by label 3?

  • ANucleotides
  • BA base
  • CHydrogen bonds
  • DDouble helix
  • ESugar-phosphate backbone

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