Question

multiple select question
select all that apply
the steps of dna replication involve: (select all that apply)
□ two unique dna molecules made
□ parental dna unwind or unzip at hydrogen bonds
□ complementary base pairing of
ew\ dna nucleotides to the \old\ strand of dna
□ complementary base pairing of
ew\ rna nucleotides to the \old\ strand of dna
□ two identical dna molecules made
□ parental dna splitting apart between its sugar and phosphates

Explanation:

1. Analyze "two unique DNA molecules made": DNA replication produces two identical (not unique) molecules, so this is incorrect.
2. Analyze "parental DNA unwind or unzip at hydrogen bonds": In DNA replication, the double helix unwinds by breaking hydrogen bonds between base pairs, so this is correct.
3. Analyze "complementary base pairing of 'new' DNA nucleotides to the 'old' strand of DNA": DNA replication uses DNA nucleotides to pair with the old strand (semiconservative replication), so this is correct.
4. Analyze "complementary base pairing of 'new' RNA nucleotides to the 'old' strand of DNA": This is transcription (making RNA), not DNA replication, so incorrect.
5. Analyze "two identical DNA molecules made": DNA replication results in two identical molecules (each with one old and one new strand), so this is correct.
6. Analyze "parental DNA splitting apart between its sugar and phosphates": DNA replication does not break the sugar - phosphate backbone (that's not part of replication steps), so incorrect.

Answer:

B. parental DNA unwind or unzip at hydrogen bonds
C. complementary base pairing of "new" DNA nucleotides to the "old" strand of DNA
E. two identical DNA molecules made