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liraira [26]
2 years ago
11

Tại sao DNA mạch đôi hấp thụ ánh sáng yếu hơn DNA mạch đơn

Biology
1 answer:
kirill115 [55]2 years ago
7 0

Answer:

DNA sợi đôi hấp thụ kém mạnh hơn vì tương tác xếp chồng giữa các base.

Explanation:

Quá trình này được gọi là sự thay đổi siêu sắc tố. Các gốc purine và pyrimidine trong DNA hấp thụ tia cực tím.

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What part of the scientific method do you decide if your hypothesis was right?
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Answer:

OBSERVATION is first step, so that you know how you want to go about your research. HYPOTHESIS is the answer you think you'll find. PREDICTION is your specific belief about the scientific idea: If my hypothesis is true, then I predict we will discover this. CONCLUSION is the answer that the experiment gives.

The scientific method is an empirical method of acquiring knowledge that has characterized the development of science since at least the 17th century (with notable practitioners in previous centuries). It involves careful observation, applying rigorous skepticism about what is observed, given that cognitive assumptions can distort how one interprets the observation. It involves formulating hypotheses, via induction, based on such observations; experimental and measurement-based testing of deductions drawn from the hypotheses; and refinement (or elimination) of the hypotheses based on the experimental findings. These are principles of the scientific method, as distinguished from a definitive series of steps applicable to all scientific enterprises.

1 Make an observation.

2 Ask a question.

3 Propose a hypothesis.

4 Make predictions.

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7 0
3 years ago
After incubation, you observe that your streak-plate has heavy, uniform growth but no isolated colonies. Which of the following
Vadim26 [7]

Answer:

Option 3 and 4 are most likely correct

Explanation:

<em>Option 3</em>: We know that area 1 would contain heavy streaking and not single colonies. Therefore, if the loop crosses area 3 and enters area 1, it will definitely result in heavy streaking again.

<em>Option 4</em>: We always need to sterilize properly the loop when streaking in different areas. If we don't do it, it is possible that the loop contains a lot of bacteria that would be streaked again.

Options 1 and 2 are incorrect because, according to question, there is a uniform growth but no isolated colonies. So, contamination or mixed culture would not produce uniform growth streaking rather mixed with other bacterial types.

3 0
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Answer:

D

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