DNA Structure, Function and Replication

The parts of DNA that provides the code for proteins are the _________.

• Sugars
• Phosphates
• Nitrogenous bases
• Hydrogen bonds

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NGSS.HS-LS1-1

Which of the following supports the idea that the genetic code is common to all living things?

• All living things share similar modes of reproduction
• The same adaptations help all living things survive in the same way
• All living things have identical ways of using energy for survival
• All living things contain DNA with the same nitrogenous bases

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NGSS.HS-LS1-1

NGSS.HS-LS4-1

A model of a DNA molecule is shown. 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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NGSS.HS-LS1-1

Using the table , which answer choice correctly identifies DNA bases X, Y, and Z?

• X-adenine, Y-cytosine, and Z-uracil
• X-adenine, Y-cytosine, and Z-thymine
• X-cytosine, Y-uracil, and Z-adenine
• X-thymine, Y-adenine, and Z-cytosine

The backbone of DNA is made up of what two molecules?

• Deoxyribose sugar and phosphate group
• Nitrogen base and phosphate group
• Deoxyribose sugar and nitrogen base
• Nucleic acids and amino acids

Nucleic acids contain the genetic information for an organism. What are the monomers of nucleic acids made up of?

• Amino acids
• Monosaccharides
• Glycerol and fatty acids
• Nucleotides

DNA replication is semi-conservative, meaning that it results in

• Two completely new DNA molecules
• Two DNA molecules that each contain a strand of the original
• One new DNA molecule, one old molecule is conserved
• One new molecule of RNA

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NGSS.HS-LS3-2

The fact that a strain of yeast with a certain defective gene can use the human version of the gene to repair itself is evidence that yeast and humans - 

• Depend on the same food supply
• Share a genetic code
• Both have eukaryotic cells
• Have identical genomes

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NGSS.HS-LS4-1

According to Chargraff’s ratio, if 36% of Jason’s DNA is made up of thymine nucleotides, what percent of his DNA is made up of adenine nucleotides?

• 14%
• 18%
• 36%
• 72%

Enzymes play a crucial role in DNA replication. What is the role of DNA polymerase?

• Match the complimentary nitrogen bases to form a new DNA strand
• Break the weak hydrogen bonds between nitrogen bases
• Unwind the double helix structure of DNA
• Glue the sugars and phosphates of adjacent nucleotides