DNA Replication Quiz

DNA replication is the process of:

• Breaking DNA into pieces

• Making an exact copy of DNA

• Changing DNA into RNA

• Destroying old DNA

DNA replication takes place during which phase of the cell cycle?

• G1 phase

• S phase

• M phase

• G2 phase

One reason DNA must replicate is to:

• Produce energy

• Help new cells receive genetic information

• Digest food

• Remove waste

Semiconservative replication means each new DNA molecule contains:

• Two old strands

• Two new strands

• One original strand and one new strand

• No original strands

Why does each new cell need a copy of DNA?

• To become smaller

• To receive instructions for cell activities

• To lose water

• To change shape

DNA strands run in opposite directions. This is called:

• Parallel

• Antiparallel

• Circular

• Random

If one DNA strand runs 5′ → 3′, the opposite strand runs:

• 5′ → 3′

• 3′ → 5′

• 5′ → 5′

• 3′ → 3′

Complementary base pairing helps DNA replication by:

• Making DNA shorter

• Ensuring correct matching of bases

• Breaking DNA strands

• Changing nucleotides randomly

If DNA could not replicate before cell division, cells would:

• Have no genetic information to pass on

• Make more proteins

• Grow faster

• Become bacteria

Why is accurate DNA replication important?

• It prevents mistakes in genetic information

• It changes eye color

• It stops all mutations completely

• It makes cells invisible