DNA Replication Review

A nucleotide is made of three components: a phosphate group, deoxyribose sugar, and ________

• nitrogenous base
• deoxyribose sugar

• phosphate group

• Hydrogen Bond

A nucleotide is made of three components: nitrogenous base, phosphate group, and ________

• deoxyribose sugar
• nitrogenous base

• phosphate group

• hydrogen bond

A nucleotide is made of three components: nitrogenous base, deoxyribose sugar, and ________

• phosphate group
• nitrogenous base

• deoxyribose sugar

• hydrogen bond

Two DNA molecules identical to each other, containing the same genetic code as the original DNA molecule, are produced through the process ___________

• DNA replication
• cell division

• cell cycle

• mitosis

The diagram illustrates part of the process of DNA replication. What is occurring

at point A?

• DNA helicase is unwinding a segment of DNA into two separate strands.

• DNA polymerase is proofreading the new DNA strand

• DNA helicases are exchanging sections, which will then be rejoined.

• DNA polymerase is adding new nucleotides to the 3′ end of the RNA primase.

Using the diagram attached, identify the enzyme labeled as (a) that is signaled by primase to begin synthesizing the new DNA strand by adding DNA nucleotides.

• Primase

• DNA polymerase

• Ligase

• Helicase

The first step of DNA replication begins with which of the following steps?

• Unzipping DNA helix into 2 separate strands

• Primase attaches RNA primers to DNA, starting point for DNA polymerase

• ​DNA polymerase builds new DNA strands by adding new nucleotides.

• Second type of DNA polymerase scans DNA for any errors and fixes any found

The model represents 2 strands of polynucleotides attached by hydrogen bonds at their complementary base pairs. Each polynucleotide is made of nucleotides bonded at their phosphodiester bonds. Examining the image, how is each nucleotide different from each other?

• Hydrogen bonds of each base pair

• Sugar-Phosphate backdone

• Nitrogenous bases

• Deoxyribose sugars

The nitrogenous base labeled as 1 is _______.

Tags

NGSS.HS-LS1-1

Nitrogenous base labeled as 2 is _______.

Tags

NGSS.HS-LS1-1