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Pachacha [2.7K]
2 years ago
8

If cordycepin triphosphate is added to a cell-free transcription reaction, the nucleotide is added onto the growing rna chain bu

t no more nucleotides can then be added. the added cordycepin is always found at the 3' end of an rna. examine the structure of cordycepin and explain why it ends transcription.
Biology
1 answer:
qwelly [4]2 years ago
3 0
<span>Cordycepin <span>is a derivative of the nucleoside adenosine and because of their’s similarity it can be incorporated into RNA and inhibit RNA chain elongation. The end of the RNA synthesis occurs due to the absence of a hydroxyl group in the 3' position of cordycepin’s ribose.</span></span>
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20. Explain how health care professionals treat unregulated (or abnormal) cellular growth in the body
goldenfox [79]

Unregulated and uncontrolled cell growth is the most common simple definition of cancer. Because of the many types of cancers and a huge range of possible symptoms, treatments are also very diverse. Type of treatment also depends on cancer stage at diagnosis, and the patient's overall health. Some forms of treatment:

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• Hormone therapy

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8 0
2 years ago
Why are indices better than simple measurements for comparing fossil specimens?
damaskus [11]

Answer:

Indices are used to study fossil specimens and compare them against each other. They are based on concept of ratio hence better than simple measurements when it comes to comparative analysis. They compensate for the problems caused by other variable factors like size or specimen.

For example, to estimate if an organism is long or round headed simple measurement of cranial length or breadth can be done and the result can be given according to the selected parameter. However some specimens will have longer breadth than length and some will have longer length than breadth. So, it is better to measure both the parameters and find out their ratio. Hence, cranial index is used which is given by: (Cranial breadth/Cranial length)*100.

8 0
2 years ago
Which of the following choices correctly matches a tool and its proper application?
Alecsey [184]

Answer:

The correct answer is option A. "cell fractionation to study the function of specific organelles".

Explanation:

Cell fractionation is a scientific process used to study the function of specific organelles, which main idea is to fractionate the cells but preserving the individual function of the elements of the cell. Usually, the separation takes place by a centrifugation method. This methodology was developed to identify the location of the organelles within the cells, but nowadays is used to study its functions.

8 0
2 years ago
When you cross two heterozygotes (aa), the offspring will most likely be __________?
Cerrena [4.2K]
When you cross two heterozygotes with the genotype Aa, the offspring will be:   <span>Parents: Aa  x  Aa</span>
<span>F1 generation: AA  Aa  Aa  aa</span>
<span>This means that ½ of the offspring will be heterozygous, ¼ will be homozygous (dominant) and ¼ will be homozygous (recessive).</span>
6 0
2 years ago
Select the correct answer from each drop-down menu. How did Burmese pythons become an invasive species? Species used for ornamen
stepladder [879]

Answer:

be placed in another area that is not native, so it is introduce in a food web that is not it native food web.

Explanation:

In Florida, USA, there were a problem when some citizens decide to adopt and grow some pythons as an exotic pet. When they grow a lot, the owners release them in a National Park or they escape from their houses, until they reach the aquatic ecosystem, so raccoons and opossums that  feed near the water edge, they become preys of the phytons. As a result the natural food web of the ecosystem, move, giving as a result lost of another specie native of the area.

Hope this info is useful.

6 0
2 years ago
Read 2 more answers
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