Review DNA Structure and Nucleotides

There are 8 components present in nucleic acids in the box. Use the DNA structure and the list of components to determine which components bond with adenine in a section of DNA?

• 1,3,5, and 6 only

• 3,5

• 2, 4

• 3,4, 7, and 8 only

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Students are given data from an investigation that identified some of the chemical elements present in four different samples. Which sample was most likely DNA?

• Sample 1

• Sample 2

• Sample 3

• Sample 4

A model of the DNA molecule is shown below. The arrow indicates ---

• The bond between adjacent phosphate and deoxyribose molecules

• The junction of introns and exons in the sense strand of DNA

• The hydrogen bond between complementary nucleotides

• the junction of a codon and a DNA triplet

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A segment of a DNA strand is shown. Which of these is the correct complementary DNA strand for the segment shown?

• 5' AGGTCAGGT 3'

• 5' ACCUGAGGU 3'

• 5' TGGACTGGA 3'

• 5' TCCACTCCA 3'

A student used poster board to construct this model of a section of DNA. Which statement describes this model of DNA?

• The model is inaccurate because some typical bases in DNA are missing

• The model is accurate because it contains correctly paired bases

• The model is accurate because it shows each base splitting to form a double helix

• the model is inaccurate because the base pairs are incorrect

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Each strand of a DNA molecule contains nitrogenous bases that pair with other nitrogenous bases in very specific ways. A diagram of a section of DNA is shown. Which DNA Strand is complementary to the one shown below?

• 5' AGUGCUGCGCGUA 3'

• 5' TGTAGCTCGGCGT 3'

• 5' ACATCGACGCGCA 3'

• TCGCGCAGCTACA 3;

Which part of a DNA molecule is responsible for the direct doing of specific traits in an organism?

• the number of hydrogen bonds that hold the strands of DNA together

• The number of carbons in the DNA molecule.

• The sequence of phosphates along each DNA strand.

• The sequence of nucleotide bases in the DNA strand.

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NGSS.HS-LS3-1

Differences in traits such as hair texture are determined by differences in

• the location of sugar groups in DNA

• The sequence of nucleotides in DNA

• the number of nitrogenous bases in DNA

• the molecules attached to the phosphate in DNA

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NGSS.HS-LS3-1

Nitrogenous bases are located on both strand of the DNA double helix. What is the significance of the nitrogenous bases?

• The number of adenines and cytosines determines the type of RNA that will be produced.

• The amount of thymine and guanine in the DNA molecules determines the length of the genes

• the order of nitrogenous bases determines the order of amino acids in the proteins synthesized

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NGSS.HS-LS1-6

The sequence of nitrogenous bases in DNA varies widely. The sequence of the bases in DNA is most important for which of the following?

• Providing the instructions for the traits of an organism.

• Preventing mutations from occurring during DNA replication.

• Allowing the DNA to have the shape necessary for replication.

• Helping form the sugar-phosphate backbone of DNA molecules

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