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Ghella [55]
3 years ago
13

A scientist investigated DNA replication in two groups of cells, labeled A and B. She injected radioactively labeled nucleotides

into cells of each group and allowed DNA replication to begin. When replication was halfway completed, she injected a drug into the cells to stop replication. She then examined the cells to determine the distribution of the newly-synthesized DNA. She found each cell of group A had many segments of new DNA in its nucleus, while each cell of group B had a single segment of new DNA in its cytoplasm. What can the researcher conclude about the cells? A. Group B cells are eukaryotic because they must have a single origin of replication. B. The cells in group A are eukaryotic because they replicate their DNA in the cytoplasm or nucleus. C. Group A cells are prokaryotic because they must have many origins of replication. D. The cells in group B are prokaryotic because they replicate their DNA in the cytoplasm.
Biology
1 answer:
Maksim231197 [3]3 years ago
5 0

Answer:

D. The cells in group B are prokaryotic because they replicate their DNA in the cytoplasm.

Explanation:

The cells of group A are prokaryotic because it is prokaryotes which do not have a double membranous structure called nucleus for storing their genetic material. The genetic material of prokaryotes is spread in the cytoplasm in the form of a circular DNA which is called as nucleoid. Since they do not have a separate organelle like nucleus for storage of their genetic material, they are bound to replicate their DNA in the cytoplasm. In contrast to prokaryotes, eukaryotes have nucleus for storage of their genetic material and in eukaryotes replication is an exclusively nuclear event.

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FrozenT [24]

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By this picture, we can easily see that even though we have rock strata from different regions, the same layers contain the same fossil, and it is a fossil that also is rapidly evolving so has a minor change in each layer.

7 0
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The polymerase chain reaction (PCR) has revolutionized biology and medicine, by allowing small regions of DNA to be amplified up
Usimov [2.4K]

Answer:

DNA polymerases from human cells will denature under these conditions.

Explanation:

Under the PCR conditions described, DNA polymerase from <em>T. aquaticus </em>would be more effective than DNA polymerase from human cells. This is due to the higher optimal temperature of DNA polymerase from <em>T. aquaticus. </em>

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3 years ago
Appears to contain a multilobed nucleus. what is the most likely identity of the observed leukocyte?
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<h3>What is Neutrophil ?</h3>

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To learn more about Neutrophil  from the given link:

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8 0
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During anaerobic respiration, muscle do not use oxygen to burn glucose. During anaerobic respiration in muscles, the glucose is converted into pyruvate and then this pyruvate gets convert into lactate and this process is called lactic acid fermentation. In this process, 2 ATP are produced.

8 0
3 years ago
If limestone reacts with limestone, it can turn into which harder rock?
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Answer:

If limestone reacts with limestone, it can turn into a limestone. The reason behind this formation is that, both substances have the same chemical and physical properties and molecules of limestone have a strong chemical bonds between them so it is difficult to separate them from each other.

8 0
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