<h2>Cell Structure Revision Notes</h2>
<p>This section is a comprehensive <b>summary</b> of cell biology. The nucleus acts as the control center of the cell, containing DNA.</p>
<h3>Key Organelles to Memorize:</h3>
<ul>
<li><b>Mitochondria:</b> The 'powerhouse' of the cell (ATP production). Vital for <b>biology exams</b>.</li>
<li><b>Ribosomes:</b> The site of protein synthesis.</li>
<li><b>Cell Membrane:</b> Controls what enters and leaves the cell.</li>
</ul>
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