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Update Unit 2: Biology.md with clearer information about nucleolus and cytoplasm

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Daniel Chen 2019-10-25 14:51:33 +00:00 committed by James Su
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Grade 10/Science/SNC2DZ/Unit 2: Biology.md
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@ -43,7 +43,12 @@ A person contains roughly 100 trillion cells
### Nucleolus
- Dense region of DNA located in the nucleus
- This area of DNA is specially for ribosomal DNA (rDNA)
- Produce "large" and "small" units of complete ribosomes, which either remain free or mix with endoplasmic reticulum, forming rough endoplasmic reticulum (RER)
- This area of DNA is specially for ribosomal DNA (rDNA), or DNA used to make ribosomes
- Produce "large" and "small" subunits of ribosomes, which either form complete ribosomes in cytosol or mix with endoplasmic reticulum, forming rough endoplasmic reticulum (RER)
- Is *not* surrounded by a membrane, literally is just same as rest of nucleus but denser
### Cytoplasm & Cytosol
- Cytosol is the fluid cells contain
- All organelles are suspended in cytosol
- Cytoplasm is the cytosol along with everything in a cell, excluding the nucleus