18
34) Which of the following statements about DNA replication is NOT correct?
A) The DNA molecule unwinds as the hydrogen bonds are broken
B) Replication occurs as each base is paired with one exactly like it
C) The process is known as semiconservative replication because one old
strand is conserved in the new molecule
D) The enzyme that replicates the DNA is DNA polymerase
E) The enzyme that links the Okazaki fragments together is DNA ligase
35) A “mini-gene” has the base sequence TACCCGTGCACG. If the T at the
beginning of the sequence is deleted, what will be the consequence?
A) All of the codons after that point will be changed
B) Only the amino acid coded for in that codon will be changed
C) RNA polymerase will skip that codon, but all the others will be read
normally.
D) RNA polymerase will correct the deletion, and a normal protein will be
produced
E) The first nucleotide is always replaced anyway, so there will be no
change.
36) Which point mutation would be most likely to have a catastrophic effect?
A) A base substitution
*B) A base deletion near the start of the coding sequence
C) The deletion of three bases near the start of the coding sequence
D) A base deletion near the end of the coding sequence
E) A base deletion at the very end of the coding sequence
37) The cell formed through fertilization is called a/an
A) Zygote
B)
Gamete
C) Sperm cell
D)
Ovum
E) Egg cell
38) Which sequence of stages in mitosis is correct?
A) Prophase, anaphase, metaphase, telophase
B) Prophase, metaphase, anaphase, telophase
C) Anaphase, metaphase, telophase, prophase
D) Anaphase, prophase, telophase, metaphase
E) Prophase, telophase, anaphase, metaphase
39) Which does not occur in telophase?
A) Cytokinesis is under way
B) The nuclear membrane is being reconstructed
C) The centromeres split apart
D) Chromosomes de-condense into chromatin
E) The nucleolus reforms