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dlinn [17]
2 years ago
14

PLEASE HELP WITH THIS ONE QUESTION

Biology
1 answer:
Simora [160]2 years ago
5 0
What systems supply food and oxygen needed for respiration quizlet? The circulatory system carries nutrients (food/glucose) and oxygen to the muscles where the mitochondria can use the oxygen to break down the food to produce cellular energy.
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One cycle in a polymerase chain reaction (PCR) involves incubating the sample at three successive temperatures: 94° C., 50° C.,
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Answer:

 Initial extension ( elongation)

Explanation:

in PCR cycle  , there is a third step called as extension (also called as elongation step) which is performed at 72  ° C. In this step taq polymerase will add nucleotides to the primers attached for the extension of template Strand.

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3 years ago
In which direction does RNA synthesis proceed?
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Answer:

5' to 3'.

Explanation:

Transcription may be defined as the process of formation of RNA molecule from the template DNA with the help of enzymes and the various transcriptional factors.

The process of RNA synthesis occur in the 5' to 3' direction. The RNA polymerase reads in the 3' to 5' direction and leads to the synthesis in 5' to 3' direction. The transcription factors binds to the DNA promoter during RNA synthesis.

Thus, the correct answer is option (d).

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In cells, hydrogen peroxide is converted to water and oxygen through the activity of

<span>= ENZYMES</span>

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The difference is really simple, it's basically whether it's an plant or animal 
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Answer B

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