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MA_775_DIABLO [31]
2 years ago
11

In a PCR reaction, a few seconds at high temperature disrupts the ____ that hold the two strands of DNA together, so every molec

ule of DNA unwinds and becomes single-stranded.​
Biology
1 answer:
Andrews [41]2 years ago
7 0

Answer:

Hydrogen Bonds

Explanation:

In the polymerase chain reaction (PCR) the temperature rises to 90 ° C - 95 ° C, to break the hydrogen bonds, which are the types of bonds responsible for pairing the two strands of DNA, this process is known as denaturation of DNA.

The DNA is extremely stable, due to a large number of bonds (hydrogen bonds) that form between the two strands. If the temperature decreases, these bonds will begin to recompose, until the DNA returns to its original state

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Darya [45]

Answer:

According to the result recorded, there was no cholesterol in the albumin solution. This is probably because the cholesterol is in the egg yolk and not the egg white. In order to get a positive response on the presence of cholesterol in eggs, an egg yolk albumin stock needs to be prepared. So using the same procedure as before and only replacing the egg yolk for the egg white, prepare a 0.5 mL of egg yolk with 4.5 mL distilled water mixture in a test tube. Follow the steps given in the lab manual to check for presence of lipids in this albumin stock. Take a filter paper and add one drop of Sudan III solution onto it, let it dry and then place a drop of the stock prepared and analyze if the color transfer happens.

Hope that answers the question, have a great day!

3 0
2 years ago
Four Students were having a discussion about how scientists do their work. This is what they said... Antoine: "I think scientist
stepan [7]

Answer:

Please see below  

Explanation:

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  1. observation
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  3. experiment
  4. testing the hypothesis
3 0
2 years ago
Explain why organisms that have an electron transport chain as well as fermentation pathways seldom ferment pyruvate, if an elec
shepuryov [24]
Fermentation is extremely inefficient in terms of the number of ATP molecules produced for each molecule of glucose metabolized. Thank you for posting your question here at brainly. I hope the answer will help you. Feel free to ask more questions here.
6 0
2 years ago
When Stephanie’s light bulb did not turn on after she wired a circuit board, she asked her brother to use the same procedure to
eimsori [14]

Answer:

B

Explanation:

7 0
2 years ago
Read 2 more answers
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weqwewe [10]

Answer:

The correct answer is A

Explanation:

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5 0
2 years ago
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