DNA and DNA Replication

Match the following

• Builds the new strand

• Helicase

• The unzipper

• Ligase

• Glues fragments together

• DNA Polymerase

• Tells where to start

• Primase

What makes up the SIDES of a DNA ladder?

• nitrogen bases

• sugars & phosphates

• genes & chromosomes

• RNA

Which of the following best describes a DNA molecule?

• double helix
• contains ribose
• made of amino acids
• contains Uracil

What are the three components of a nucleotide?

• sugar, hydrogen, nitrogen base
• sugar, oxygen, nitrogen base
• sugar, phosphate, nitrogen base
• sugar, phosphate, protein

What is the significance of the sequence (order) of the Nitrogen Bases in DNA?

• The order of the Nitrogen Bases determines the number of chromosomes present in an organism.
• The order of the Nitrogen Bases determines the traits that an organism will possess (have).
• The order of the Nitrogen Bases determines the gender of an organism.
• The order of the Nitrogen Bases determines whether an organism is abiotic biotic.

What are the 4 nitrogen bases?

• adenine, thymine, cytoplasm, and guanine
• adenine, thymine cytosine, and guanine
• adenine, thymine, cytosine, and gylcerol
• adenine, thymine, cytosine, and glucose

Which of the following DNA nucleotides are paired with the correct corresponding DNA nucleotide? (mark all that apply)

• Adenine with Thymine

• Guanine with Cytosine

• Thymine with Cytosine

• Adenine with Uracil.

• Uracil with Thymine

Which is the role of DNA polymerase?

• Unwinds the original DNA strand

• Lays down RNA primer for new nucleotide bases.

• Builds new strands by bringing in new nucleotide bases.

• Remove Okazaki fragments for new nucleotides.

Nitrogenous bases are joined by which type of bond?

• polar bonds
• ionic bonds
• covalent bonds
• hydrogen bonds

Why does DNA replicate?

• To create another copy for the new cell
• To create a duplicate copy in case the original gets damaged
• To create a new copy to replace the damaged original