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geniusboy [140]
3 years ago
5

Nucleotides can be radiolabeled before they are incorporated into newly forming DNA and, therefore, can be assayed to track thei

r incorporation. In a set of experiments, a studentfaculty research team used labeled T nucleotides and introduced these into the culture of dividing human cells at specific times. The research team used their experiments to study the incorporation of labeled nucleotides into a culture of lymphocytes and found that the lymphocytes incorporated the labeled nucleotide at a significantly higher level after a pathogen was introduced into the culture. They concluded that _____.
Biology
1 answer:
Usimov [2.4K]3 years ago
6 0

Answer:

The four nitrogenous bases that are present in DNA are adenine, guanine, thymine and cytosine. These nucleotides can be radiolabelled before the new DNA forms and the composition of specific nucleotide of DNA can be estimated.

During the experiment, research team found that the incorporation of radioactive nucleotides composition increase after the introduction of pathogen in the culture. This means that the cell starts producing more number of cell to fight against the pathogen. The infection of pathogen is mainly responsible for the division of lymphocytes more rapidly.

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Many different organisms live in Amanda’s garden. The diagram shows a simple food web of some of the organisms in her garden.
Alex787 [66]

Answer:

The snakes keep the mice from overpopulating, which could deplete their resources.

Explanation:

The mice and the moles are not competing against each other as they feed on different food. The problem is that if the mice population is not regulated, their very quick reproduction will cause overpopulation in very short space of time. The more mice there will be , the more food will be needed, so very soon the resources will be depleted, resulting in collapse of the mice population. This is where the snakes come in action, as they eat mice, so they are the ones that control and keep their population stable, thus not allowing the mice to overpopulate the area and destroy themselves.

4 0
3 years ago
Approximately how many bytes are in a kilobyte (kb)?
Aliun [14]
Hey there,
To be exact, <span>1,048,576 Kilobytes

Hope this helps :))</span><span>
</span>
~Top
3 0
3 years ago
Explain the precautions for immunizing children with Bruton's agammaglobulinemia.
topjm [15]

Answer:

Avoid using killed vaccine for administration.

Explanation:

Bruton's agammaglobulinemia may be defined as the X linked disorder that affects the immune system of an individual. This disease is mainly caused by the mutation in the gene responsible for coding the  Bruton tyrosine kinase.

The children suffering from this disease require special immunization and some precaution must be followed before immunizing them. These patients are not allowed to immunizes with the live vaccines as these vaccines can evoke the immune response strongly and child may get infected by the disease. The individual should not given immunosuppressive drugs or corticosteroids.

Thus, the answer is avoid using killed vaccine for administration.

8 0
3 years ago
Why is it difficult to observe individual chromosomes with a light microscope during interphase?
asambeis [7]

Answer:

They have uncoiled to form long, thin strands.

Explanation:

Chromosomes are present in cell nucleus and consist of chromatin. Genes are present in linear order on chromosomes.  The chromosomes become visible under the microscope as distinct structures during cell division. When cells are not dividing, the chromosomes decondense to loose their individuality and make the mass of chromatin.  

Chromatin is complex of DNA and packing proteins. As the cells enter the prophase stage of cell division, condensation of chromatin occurs and individual chromosomes become visible under microscope. Before that (during interphase), chromosomes are not visible as they are present in decondensed form.

7 0
3 years ago
Urinary retention with consistent or intermittent dribbling of urine is called a. mixed incontinence. b. overflow incontinence.
NeTakaya

Answer:

b. overflow incontinence

Explanation:

Overflow incontinence is a medical condition that is characterized by uncontrolled leakage of urine from filled urinary bladder in the absence of the urge to urinate by the affected individual.

It is a condition that is usually caused by blockage of bladder outlet or weakness in the muscle responsible for the expulsion of urine from the bladder.

The correct option is b.

5 0
4 years ago
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