DNA Structure and Replication

Enzyme that unwinds the DNA

• ligase
• DNA Polymerase
• primase
• helicase

Seals the Okazaki fragments together

• DNA Polymerase
• ligase
• helicase
• primase

Adds nucleotides to the newly synthesized strand of DNA

• DNA nucleotidase

• DNA polymerase

• Primase

• Ligase

synthesizes a short fragment of RNA that allows DNA polymerase to bind

• ligase

• DNA polymerase I

• primase

• helicase

direction new nucleotides are synthesized on the new strand

• 5^' to 3' (new nucleotides added to the 3' end)
• 3' to 5' (new nucleotides added to the 5' end)

In a molecule of double-stranded DNA, the amount of Adenine present is always equal to the amount of

• cytosine
• guanine
• thymine
• uracil

Guanine bonds with ______________.

• Adenine
• Guanine
• Cytosine
• Thymine

Which 2 molecules form the sides (backbone) of the DNA ladder?

• deoxyribose sugar and adenine
• deoxyribose sugar and a hydrogen bond
• deoxyribose sugar and the nucleus
• deoxyribose sugar and phosphate

Which organelle is DNA usually found in?

• cell membrane
• vacuole
• chloroplast
• nucleus

Nitrogenous bases are joined by which type of bond?

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

Tags

NGSS.HS-LS1-1