Question

1. the site where the old dna strands separate and new dna strands will be synthesized is called the

a) primer
b) okazaki fragment
c) template
d) rolling circle
e) replication fork

1. a permanent, inheritable change in the genetic information is called

a) translation
b) transcription
c) mutation
d) alteration
e) regeneration

1. for dna replication, a primer of ______ is needed at the origin of nucleotide addition.

a) polymerase iii
b) polymerase i
c) helicase
d) rna
e) dna

1. a three base sequence on mrna is called a/an ______

a) codon
b) exon
c) anticodon
d) intron

1. the rna molecules that carry amino acids to the ribosomes during protein synthesis are called ______

a) ribosomal rna
b) messenger rna
c) transfer rna
d) primer rna
e) ribozymes

1. rna molecules differ from dna molecules because only rna ______

a) has ribose
b) has uracil
c) is typically one strand of nucleotides
d) does not have thymine
e) all of the choices are correct.

Explanation:

• Question 11: The structure where the old DNA strands separate and new DNA strands build for replication is the replication fork.
• Question 12: A permanent, inheritable change in genetic information is a mutation.
• Question 13: For DNA replication, a primer of RNA is needed at the origin of nucleotide addition.
• Question 14: A three - base sequence on mRNA is called a codon.
• Question 15: The RNA molecules that carry amino acids to the ribosome during protein synthesis are transfer RNA.
• Question 16: RNA molecules differ from DNA molecules as RNA has ribose (instead of deoxyribose in DNA), has uracil (instead of thymine in DNA), and is typically one - strand of nucleotides (while DNA is double - stranded).

Answer:

1. D. replication fork
2. C. mutation
3. D. RNA
4. A. codon
5. C. transfer RNA
6. E. All of the choices are correct.