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BIO 253 - Quiz 2 | Atcual Exam Questions and Answers with Verified Solutions | Latest Updated 2026

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BIO 253 - Quiz 2 | Atcual Exam Questions and Answers with Verified Solutions | Latest Updated 2026

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BIO 253
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BIO 253

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BIO 253 - Quiz 2 | Atcual Exam Questions and
Answers with Verified Solutions | Latest
Updated 2026



Define cell Basic unit of life



Parts of cell - Nucleus
- Cytoplasm
- Cell membrane
- Organelles


Cell membrane - Selectively permeable
- Made from lipids & protein
- Phospholipid bilayer with tails pointing
inward
- Has channels


Cytoplasm - Jelly-like fluid made of actin
- Cytosol + organelles = fluid portion of cell


Organelle: Ribosomes - Participate in the translation of RNA to
proteins
- Attached to RER
- Made in nucleus


Organelle: RER - Has ribosomes & makes protein
- Next to nucleus
- Rough

, Organelle: SER - Makes lipids & steroids
- Next to RER
- Shiny & smooth


Organelle: Vesicles - Membrane sac
- Stores/transports


Organelle: Golgi Apparatus - Stacks of vesicles
- UPS center responsible for transport
- Refines, packages, delivers proteins
made in the
RER


Organelle: Mitochondria - Makes ATP
- Powerhouse
- Has an inner & outer membrane


Organelle: Lysosomes - Protects
- Has enzymes to break down material
- Garbage disposal


Centrosomes - Central body
- Always in pairs
- Sac that contains pairs of centrioles


Cilia - Hairlike projection on cell membrane
- Aids in movement & defense
- Antioxidants improve motility
- Found in respiratory tract & fallopian
tubes
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