In this worksheet, we will practice describing the structure of DNA, and explaining how DNA can be extracted from organic material.
A section of DNA contains the order of bases ATGCTTAA. What would the complementary sequence of bases be?
What term is given to the shape that DNA forms?
- ATriple helix
- BSpiral helix
- CDouble helix
- DDouble helicase
- ESingle helix
What term is given to a short section of DNA that may code for a specific protein?
- CBase pair
Which of the following is not an example of a base found in eukaryotic DNA?
The two strands of DNA are held together by complementary base pairs.
In DNA, which other base does C bond to?
In DNA, which other base does T bond to?
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
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.
What term is given to all of the DNA in an organism?
The four bases in DNA are often called A, T, G, and C.
What does A stand for?
What does T stand for?
What does C stand for?
What does G stand for?
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.
The given diagram shows a section of DNA.
What structure is represented by label 1?
- ASugar-phosphate backbone
- BHydrogen bonds
- CDouble helix
- EA base
What structure is represented by label 2?
- AHydrogen bonds
- BDouble helix
- CSugar-phosphate backbone
- DA base
What structure is represented by label 3?
- BA base
- CHydrogen bonds
- DDouble helix
- ESugar-phosphate backbone