DNA Structure, function and replication

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

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

• Sugars
• Phosphates
• Nitrogenous bases
• Hydrogen bonds

Tags

NGSS.HS-LS1-1

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

Tags

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

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

What kind of molecule is DNA?

• carbohydrate

• lipid

• protein

• nucleic acid

What is the monomer (building block) of a DNA molecule?

• fatty acid

• nucleic acid

• nucleotide

• amino acid

What are the correct base pairs?

• A and G, C and T

• A and C, G and T

• C and G, A and T

• A and A, G and G, C and C, T and T

Why can bacteria recognize a human gene and then produce a human protein?

• Cell division in bacteria and humans is the same.

• Bacterial cells contain the same organelles as human cells.

• The basic DNA components are the same in humans and bacteria.

• Bacteria and human cells have the same number of chromosomes.