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9966 [12]
3 years ago
13

How do cigarettes and radiation cause cancer? View Available Hint(s) How do cigarettes and radiation cause cancer? by destroying

healthy cells by repressing the cell cycle by toxic chemicals (in smoke) or radiation that can damage the DNA in cells by destroying DNA by activating DNA mismatch-repair enzymes
Biology
1 answer:
blagie [28]3 years ago
3 0

Answer: B.  by toxic chemicals (in smoke) or radiation that can damage the DNA in cells.

Explanation:

The carcinogens presents in cigerates covalently bind to DNA and form DNA adducts which results into miscoding (e.g., insertion of the wrong base) during replication of DNA and this genetic mutation causes uncontrolled cellular growth which causes cancer.

Ionising radiation including X-rays, radioactive particles, and gamma rays,can cause cancer by damaging DNA. high-energy radiation damages DNA and cause genetic mutation same as cigerates and causes cancer.

Both toxic chemicals (in smoke) or radiation damages DNA inthe cells which leads to cancer.

Hence, the correct option is B.

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3 years ago
5. In 1928, Alexander Fleming noticed that a mysterious blue-green fungus had grown on some bacterial colonies that were known t
Otrada [13]

Answer:

The steps that can be seen in this story are observation and the questioning phase, which can also be called elaboration of the problem.

Explanation:

The scientific method is a set of phases that are able to guide researchers to the creation of scientific knowledge, through an experiment. This method is essential for conducting scientific research, allowing an experiment to be managed in a way that promotes answers to scientists' questions. The scientific method presents the phases called observation, questioning (or elaboration of the problem), elaboration of hypotheses, experimentation, analysis of the results and conclusion.

In the story shown in the question above, we can see the phases called observation and questioning. The observation takes place the moment Fleming noticed a fungus capable of growing on colonies of bacteria that cause throat infections, killing them. This observation made him enter the questioning phase, when he wondered if the fungus was able to prevent the growth of these bacteria.

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When trying to evaluate whether a dog is showing strong aggression as opposed to strong fear, one can readily see the difference
gizmo_the_mogwai [7]
The correct option is C.
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How does the information stored in DNA'S nucleotides translate into traits such as eye color and ear shape?
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<span>Traits are determined by proteins that are built according to the instructions stored in the genes.</span>
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