DNA replication results in two DNA molecules,
each with one new strand and one original strand.
each with two original strands.
each with two new strands.
one with two new strands and the other with two original strands.
During DNA replication, a DNA strand that has the bases CTAGGT produces a strand with the bases
AGCTTG.
GAUCCA.
TCGAAC.
GATCCA.
In Figure 12–5, what is adding base pairs to the strand?
DNA polymerase
chromatin
histones
nucleosomes
In Figure 12–5, what nucleotide is going to be added at point 1, opposite from thymine?
cytosine
guanine
adenine
thymine
In eukaryotes, DNA
is circular.
is located in the ribosomes.
is located in the nucleus.
floats freely in the cytoplasm.
In both prokaryotes and eukaryotes, how many copies of the chromosome are left after replication?
1
2
3
4
Which would be greater in a eukaryote than in a prokaryote?
The number of replication forks on a strand of DNA.
The total amount of adenines compared to thymines in a cell.
The percentage of guanine nucleotides.
The total number of base pairs in a chromosome.
In which cells is the accurate transmission of information most important?
sex cells
bone cells
nerve cells
skin cells
Figure 12–2 shows the structure of
a RNA molecule.
a protein molecule.
a DNA molecule.
an amino acid.
Which of the following is believed to be a key cause of immortalization of cancer cells in many tumours?
Inactivation of the telomerase enzyme.
Shortening of telomeres.
Complete loss of telomeres.
Reactivation of the telomerase enzyme.
The replication of a DNA molecule results in four copies of the same gene.
A DNA strand that had the sequence TACGTT would have a complimentary strand ATCGAT.
In eukaryotes, DNA replication proceeds in one direction along the DNA molecule.
Watson and Crick discovered that covalent bonds hold base pairs together at the center of a strand of DNA.
The tips of chromosomes are known as .
Eukaryotic DNA molecules need to be carefully copied and sorted, especially in the formation of cells during meiosis.
A prokaryotic cell replicates its before it splits to form new cells, so that each new cell can have genetic material.
A difference between Eukaryotic DNA replication and prokaryotic DNA replication is that eukaryotic DNA replication has more .
Identify and explain two roles of the molecule, represented by the spheres in Figure 12–10.
Where does DNA replication happen for prokaryotes and that of eukaryotes?
cytoplasm
mitocondria
chloroplast
nucleus
When does DNA replication happen?
G1 phase
S phase
G2 phase
M phase