DNA Replication Test Corrections

Label the parts of the Nucleotide

1. ​ (a)   portion of the DNA double helix that provides structural support to the molecule.

2. ​ ​ (b)   is the 5 carbon sugur component of DNA.

3. ​ (c)   is the nitrogen containing compound that holds Thymine, Adenine, Guanine, or Cytosine.

• phosphate group
• Deoxyribose
• nitrogenous base
• hydrogen bond
• phosphate-sugar backbone

Tags

NGSS.HS-LS1-1

DNA Replication is a process that takes place during the cell cycle. Which of the following represent steps in this process?

Select TWO correct answers.

• Free nucleotides pair with the bases in the unzipped strand, forming the other side of the DNA "ladder" as the strands continue to open up.

• The original strand of DNA is broken down by enzymes at the end of the process, leaving only the two new sides of the DNA ladder.

• Specific genes are replicated first based on complexity, then the rest of the strand replicates.

• The DNA strand is unzipped at multiple places along the chromosome through the action of enzymes.

• DNA is replicated on one side of the ladder at a time. Once one side is complete, the other side begins to replicate.

Which statement best describes the DNA molecules made from this process?

• The new DNA molecules are not identical to the original, providing variation in the DNA.

• The new DNA molecules are identical to each other and to the original molecule.

• The new DNA molecules are each identical to only one strand in the original molecule.

• The new DNA molecules are identical to each other but not to the original molecule.

Tags

NGSS.HS-LS3-2

Two DNA molecules are the result of DNA replication.  Which of the following is a true statement regarding DNA replication? 

• Each DNA 

  molecule has two 

  original strands. 

• One of the DNA 

  molecules has two 

  new strands while 

  the other has two original strands. 

• Each DNA 

  molecule  has two new 

  strands. 

• Each new DNA 

  molecule is made 

  up of one new 

  strand and one 

  original strand. 

Tags

NGSS.HS-LS3-2

Which statement best summarizes the purpose of the process of DNA replication?

• New DNA molecules are formed that have new sequences of DNA nucleotides from the original.

• As nucleotides match up with the DNA code, amino acids sequence to form the appropriate protein.

• A new mRNA molecule is manufactured that will carry a copy of the DNA’s message to the ribosome.

• Two DNA molecules, containing the same genetic code as the original DNA molecule, are produced.

Tags

NGSS.HS-LS3-2

Which statement BEST describes the semiconservative replication sequence of the DNA sequence CCGCAT?

• identical bases in the same order

• identical bases in the reverse order

• complementary bases in the reverse order

• complementary bases in the same order

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.

Tags

NGSS.HS-LS1-1

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

____-____________ is another name for the type of replication where half the original DNA is kept and the other half is synthesized from free nucleotides

Cells carry out DNA ​ (a)   to prepare for ​ (b)   . Each new cell will require its own ​ (c)   . Each new copy of DNA is an ​ (d)   copy of the parent DNA.

• replication
• cell division
• DNA
• identical