1. Changes in the DNA sequence that affect genetic information are known as
a. replications
b. mutations
c. transformations
d. prokaryotes
2. During mitosis, the
a. DNA molecules unwind.
b. histones and DNA molecules seperate.
c. DNA molecules become more tightly coiled
d. nucleosomes become more tightly packed
3. A mutation that involves one or a few nucleotides is called a
a. chromosomal mutation.
b. inversion
c. point mutation
d. translocation.
e. all of the above
4. RNA contains the sugar
a. ribose
b. deoxyribose
c. glucose
d. lactose.
5. Which of the follwing is not a point mutation?
a. inversion
b. insertion
c. deletion
d. substitution
e. none of the above
6.During the transcription, an RNA molecule is formed
a. that is complementary to both strands of DNA
b. that is identical to part of a single strand of DNA
c. that is double-stranded
d. inside the nucleus.
7. Suppose that part of an amino acid sequence of a portion changed from tyrosine-proline-glycine-alanine to tyrosine-histidine-glycine-alanine. This change was most likely caused by a point mutation called a(an)
a. deletion
b. substitution
c. transloaction
d. inversion
a. replications
b. mutations
c. transformations
d. prokaryotes
2. During mitosis, the
a. DNA molecules unwind.
b. histones and DNA molecules seperate.
c. DNA molecules become more tightly coiled
d. nucleosomes become more tightly packed
3. A mutation that involves one or a few nucleotides is called a
a. chromosomal mutation.
b. inversion
c. point mutation
d. translocation.
e. all of the above
4. RNA contains the sugar
a. ribose
b. deoxyribose
c. glucose
d. lactose.
5. Which of the follwing is not a point mutation?
a. inversion
b. insertion
c. deletion
d. substitution
e. none of the above
6.During the transcription, an RNA molecule is formed
a. that is complementary to both strands of DNA
b. that is identical to part of a single strand of DNA
c. that is double-stranded
d. inside the nucleus.
7. Suppose that part of an amino acid sequence of a portion changed from tyrosine-proline-glycine-alanine to tyrosine-histidine-glycine-alanine. This change was most likely caused by a point mutation called a(an)
a. deletion
b. substitution
c. transloaction
d. inversion