DNA structure & Function

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

Tags

NGSS.HS-LS1-1

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Which part of the DNA is responsible for the direct coding of specific traits in an organism?

• the # of hydrogen bonds

• the # of carbons in the DNA

• the sequence of nucleotide bases in the DNA molecule

• the sequence of phosphates along each DNA strand

Tags

NGSS.HS-LS1-1

NGSS.HS-LS3-1

Which statement is true, based on the picture below?

• The model is inaccurate because the base pairs are incorrect

• The model is accurate because it contains correctly paired bases.

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

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

Tags

NGSS.HS-LS1-1

Nitrogenous (nitrogen) bases are located on both strands of DNA double helix. What is the significance of nitrogen bases?

• The # of A's and C's determine the type of RNA produced

• The order of the bases determines the order of the amino acid that make up the protein

• The amount of T and G in DNA determines the length of the genes

• The type of H bonding between bases determines the amino acid that makes up the protein

Tags

NGSS.HS-LS1-1

NGSS.HS-LS3-1

What strand of DNA matches

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Tags

NGSS.HS-LS1-1

How is information for a certain protein carried on the DNA?

• As a sequence of nucleotides

• In the double-helix shape of the condensed chromosome

• In the ratio of adenines to thymines

• As a pattern of phosphates and sugars

Tags

NGSS.HS-LS1-1

Which of these models of a DNA strand shows bases that are complementary to the DNA model above?

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NGSS.HS-LS1-1

The sequence of bases in the 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 the replication

• Helping form the sugar-phosphate backbone of DNA molecules

Tags

NGSS.HS-LS1-1

NGSS.HS-LS3-1

What does the arrow indicate on the DNA model?

• 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

Tags

NGSS.HS-LS1-1

Characteristics such as widow's peak or attached earlobes are determined by the genetic code. What components of DNA are referred to as the genetic code?

• Phosphate groups

• Nitrogenous bases

• Deoxyribose sugars

• Hydrogen bonds

Tags

NGSS.HS-LS3-1