Plant cells
- Created by: emma
- Created on: 08-03-14 21:21
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- Plant cells
- Structure
- Ribosomes
- Large vacuole
- Smooth ER
- Rough ER
- Starch grain
- Cytoplasm
- Mitochondria
- Chloroplasts
- Cell wall
- Cell membrane
- Chloroplasts
- Granum
- Stack of thylakoids
- Thylakoid membrane
- Contains chlorophyll for photosynthesis
- Stroma
- Fluid filled matrix (some photosynthesis)
- Starch grains
- Energy storage (polysaccharide)
- DNA and ribosomes
- to make enzymes for photosynthesis
- Granum
- Cell wall
- Very strong so can resist stretching and tearing due to osmotic pressure
- Permeable to most molecules
- Adjacent cell walls separated by lamella
- Plasmodesmata allow material to pass between cells
- Adaption of plant cells
- Root hair cell
- No chloroplasts
- Extension projecting into soil
- Increased surface area for absorption
- Xylem
- Arranged in collumns
- Walls lignified (strength and waterproofing)
- Root hair cell
- Alpha glucose
- Starch
- Amylose
- Coiled so compact
- Insoluble so doesn't affect water potential
- Large molecules so doesn't leave cell
- Amylopectin
- Has branches so increased surface area, hydrolyzed faster
- Does not diffuse in and out of cells
- Does not effect osmosis
- Amylose
- Glycogen
- Shorter chains, highly branched, increased surface area
- More readily hydrolyzed which animals require more
- Starch
- Beta glucose
- Cellulose
- Long straight chains
- Joined by hydrogen bonds
- Form microfibrills
- Provide rigidity
- Form microfibrills
- Joined by hydrogen bonds
- Cell wall
- Long straight chains
- every other beta glucose rotates 180 for OH Groups line up
- Cellulose
- Structure
- Large molecules so doesn't leave cell
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