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NNADVOKAT [17]
3 years ago
7

What would happen if a cell replicated once in the presence of this radioactive base?Suppose one were provided with an actively

dividing culture of E. coli bacteria to which radioactive thymine had been added.A. One of the daughter cells, but not the other, would have radioactive DNA.B. Neither of the two daughter cells would be radioactive.C. All four bases of the DNA would be radioactive.D. Radioactive thymine would pair with nonradioactive guanine.E. DNA in both daughter cells would be radioactive.
Biology
1 answer:
Ket [755]3 years ago
8 0

Answer:

The correct answer is option E. "DNA in both daughter cells would be radioactive".

Explanation:

Radioactive thymidine incorporation has irremediable effects in thymine and cytosine in bacteria such as E. coli. Although there are some reports of recovery of E. coli from UV-irradiation DNA damage, the presence of radioactive bases such as thymine is often irremediable. Therefore, after a dividing culture of E. coli exposed to radioactive thymine divides, DNA in both daughter cells would be radioactive.

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Viefleur [7K]

Answer:

C. A small, circular piece of DNA

Explanation:

A plasmid, usually circular but sometimes linear, is a small double-stranded DNA unit, which is chromosome independent and is capable of self-replication. Each plasmid carries only a few genes. Carrying only a few genes, the plasmid’s size ranges from 1 to more than 1000 kbp. Genes required for organism survival and those that are generally beneficial to the host organism, such as antibiotic resistance, are often found in plasmids [1].

Mostly plasmids can be found in bacteria, but they are also present in multicellular organisms and archaea. Plasmids usually contain at least one gene and are not considered independent life forms even though they possess separate genes from their hosts

7 0
3 years ago
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Think about the lab procedure you just read. Label each factor below V if it was variable during the procedure or C if it was co
Crazy boy [7]

Answer:

The factors which remained constant are as follows -

  1. material used as the membrane
  2. amount of substances used
  3. number of trials

The factors which have shown variation are as follows -

  1. molecule size (large starch molecules vs. small glucose molecules)
  2. whether the molecules diffused through the membrane (tubing)

Explanation

Some factors with in the experiments remained constant from the point of starting of the experiment to its end. While some factors were varied to study its impact on the experiment rate of progression or on the final product formed. Thus , out of the following given factors, the ones that remained constant are -

  1. material used as the membrane
  2. amount of substances used
  3. number of trials

The factors which have shown variation are as follows -

  1. molecule size (large starch molecules vs. small glucose molecules)
  2. whether the molecules diffused through the membrane (tubing)
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4 years ago
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Where is the blood first filtered ?
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The answer is A.) W

The blood is first filtered through the Bowman’s capsule.

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3 years ago
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A humpcnid enocaom is made of two or more simple machines.
zhuklara [117]

<em>Hi! :) :) The question statement says</em>: <u>"A Humpcnid Enocaom is made of two or more simple machines."</u>

<u></u>

The answer/def: <u><em>Compound Machine </em></u>

Hope this helps! <3

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4 years ago
The cell's recycling center is the?
Mars2501 [29]
The lysosome. It recycles waste from the cell.

:)
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3 years ago
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