<p>Hi everybody,
I've got a lab due on tuesday and there are two questions I'm not completely sure on:</p>
<p>1) What is a human cell with lots of DNA and a small amount of RNA?
2) What is a human cell with lots of RNA and a small amount of DNA?</p>
<p>Here's what I've been thinking, but I can't think of an example where the cell has BOTH requirements met...</p>
<p>My thoughts so far:</p>
<p>1)DNA is used in cell division. Therefore, cells that divide frequently such as skin cells, or cancer cells, will have lots of DNA. Skin cells and cancer cells do not need very much RNA for protein synthesis. Bacteria divide frequently so bacteria would be another example of a cell with lots of DNA and a small amount of RNA. Bacteria do not need a lot of RNA for protein synthesis. </p>
<p>2) A human cell that contains little DNA and lots of RNA would be a sperm cell. A sperm cell only contains half the number of chromosomes as a regular cell, and therefore it would contain less DNA.</p>
<p>Alternatively, a cell that contains lots of RNA would be a muscle cell, because RNA is involved in the production of ribosomes, and therefore protein synthesis, which is vital for muscle cells. </p>
<p>Red blood cells and platelets would have no DNA because they do not undergo cell division, and do not even have a nucleus. </p>
<p>If anybody's got a tip,</p>
<p>Thanks!</p>