Frage 1
Frage
DNA replication results in two DNA molecules,
Antworten
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each with one new strand and one original strand.
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each with two original strands.
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each with two new strands.
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one with two new strands and the other with two original strands.
Frage 2
Frage
During DNA replication, a DNA strand that has the bases CTAGGT produces a strand with the bases
Antworten
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AGCTTG.
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GAUCCA.
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TCGAAC.
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GATCCA.
Frage 3
Frage
In Figure 12–5, what is adding base pairs to the strand?
Antworten
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DNA polymerase
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chromatin
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histones
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nucleosomes
Frage 4
Frage
In Figure 12–5, what nucleotide is going to be added at point 1, opposite from thymine?
Antworten
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cytosine
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guanine
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adenine
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thymine
Frage 5
Antworten
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is circular.
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is located in the ribosomes.
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is located in the nucleus.
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floats freely in the cytoplasm.
Frage 6
Frage
In both prokaryotes and eukaryotes, how many copies of the chromosome are left after replication?
Frage 7
Frage
Which would be greater in a eukaryote than in a prokaryote?
Antworten
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The number of replication forks on a strand of DNA.
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The total amount of adenines compared to thymines in a cell.
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The percentage of guanine nucleotides.
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The total number of base pairs in a chromosome.
Frage 8
Frage
In which cells is the accurate transmission of information most important?
Antworten
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sex cells
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bone cells
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nerve cells
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skin cells
Frage 9
Frage
Figure 12–2 shows the structure of
Antworten
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a RNA molecule.
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a protein molecule.
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a DNA molecule.
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an amino acid.
Frage 10
Frage
Which of the following is believed to be a key cause of immortalization of cancer cells in many tumours?
Antworten
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Inactivation of the telomerase enzyme.
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Shortening of telomeres.
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Complete loss of telomeres.
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Reactivation of the telomerase enzyme.
Frage 11
Frage
The replication of a DNA molecule results in four copies of the same gene.
Frage 12
Frage
A DNA strand that had the sequence TACGTT would have a complimentary strand ATCGAT.
Frage 13
Frage
In eukaryotes, DNA replication proceeds in one direction along the DNA molecule.
Frage 14
Frage
Watson and Crick discovered that covalent bonds hold base pairs together at the center of a strand of DNA.
Frage 15
Frage
The tips of chromosomes are known as [blank_start]_________________________[blank_end].
Frage 16
Frage
Eukaryotic DNA molecules need to be carefully copied and sorted, especially in the formation of [blank_start]_________________________[blank_end] cells during meiosis.
Frage 17
Frage
A prokaryotic cell replicates its [blank_start]_________________________[blank_end] before it splits to form new cells, so that each new cell can have genetic material.
Frage 18
Frage
A difference between Eukaryotic DNA replication and prokaryotic DNA replication is that eukaryotic DNA replication has more [blank_start]______________________[blank_end].
Frage 19
Frage
Identify and explain two roles of the molecule, represented by the spheres in Figure 12–10. [blank_start]d[blank_end]
Frage 20
Frage
Where does DNA replication happen for prokaryotes and that of eukaryotes?
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cytoplasm
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mitocondria
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chloroplast
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nucleus
Frage 21
Frage
When does DNA replication happen?
Antworten
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G1 phase
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S phase
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G2 phase
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M phase