DNA Structure and Replication

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

• deoxyribose sugar and a base

• phosphate and base

• deoxyribose sugar and pentose

• deoxyribose sugar and phosphate

Nitrogenous bases are joined by which type of bond?

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

Tags

NGSS.MS-PS1-1

Which enzyme is responsible for adding the RNA primer to the template strand?

• Helicase

• DNA Polymerase

• Ligase

• Primase

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

• cytosine
• guanine
• thymine
• uracil

Which organelle is DNA usually found in?

• cell membrane
• vacuole
• ribosome
• nucleus

DNA replication results in two DNA molecules,

• each one with two original strands
• each one with two new strands
• each one with one new strand and one original strand
• one with two new strands and the other with two original strands

What does the DNA helicase do during replication?

• It builds the new DNA strand
• Glues the Okazaki fragments together
• Unwinds and unzips the DNA
• Sets the RNA primer for DNA polymerase

What is the goal of DNA replication?

• To destroy the DNA molecule

• To make a new copy of DNA from an existing strand of DNA

• To make a totally new DNA molecule from nothing

• To copy the DNA into RNA

Which enzyme proofreads the new DNA strand during replication?

• DNA Polymerase
• DNA Helicase
• DNA Ligase
• DNA Primase

The following picture must be

• DNA because it's double stranded
• RNA because it's single stranded
• DNA because it's single stranded
• RNA because it's double stranded

Tags

NGSS.HS-LS1-1