Answer:
Defective checkpoints results in death of the cell.
Normal checkpoints make sure the cell has enough resources for cell division. Normal checkpoints ensure the cells commits apoptosis if the cell has a problem it cannot fix itself.
Answer: B. <em>The nucleus</em>
Explanation:
"Their nuclei are unstable, so they break down, or decay, and emit radiation."
{please give me brainliest :)}
During middle age <span>an individual may experience initial decline of physical and mental attributes. This also increases during the last stage of life, old age.</span>
<h2>
Answer</h2>
The right option is (A).
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Explanation</h2>
The RNA gets its information from DNA to synthesise the proteins. It is different from DNA also due to the difference in one nitrogen basis as uracil. The thymine, the nitrogen basis that is only present in DNA is replaced with uracil to form RNA coding. The uracil also contains the same features as thymine has in DNA strains. Uracil makes a double H-bond with the adenine but does not contain CH4 group which is present in thymine.
