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17 Cards in this Set
- Front
- Back
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______ has a smaller surface area to volume ratio Less efficient at transporting materials across plasma membrane. Less surface area to move material across per unit of volume |
Larger cell (animal cell) |
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_________ has a greater surface area to volume ratio. More efficient at transporting materials across plasma membrane More surface area to move material across per unit of volume |
Smaller cell (bacterial cell) |
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Selective barrier that allows sufficient passage of oxygen, nutrients, waste to service the volume of the cell
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Plasma Membrane
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Selective barrier based on |
size, charge, and space |
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membrane for the nucleus called |
nuclear envelope |
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encloses the nucleus, separating it from the cytoplasm --Double membrane (phospholipid bilayer) |
Nuclear envelope
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lines each pore, regulating entry and exit of macromolecules
-- where mRNA comes out of nucleus |
pore complex
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lines (lining) inside of the nuclear membrane
Net like array of protein filaments maintains the shape |
Nuclear lamina-
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framework of fibers extends throughout the nuclear interior |
Nuclear matrix (middle) |
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DNA in discrete units called?
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Chromosomes |
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complex of proteins and DNA |
Chromatin |
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Where Ribosomal RNA (rRNA) is synthesized & assembled into large & small subunits |
Nucleolus |
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Make proteins using DNA as “directions”
Made of rRNA and protein |
Ribosomes
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Ribosomes carry out protein synthesis in 2
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In the cytosol- free ribosomes On the outside of the endoplasmic reticulum (ER)- bound
ribosomes |
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make proteins found in membranes, packaged within organelles, exported (secreted)
make proteins destined insertion into membranes within certain organelles such as lysosomes or export from the cell (secretion) - pancreas |
Bound ribosomes-
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make proteins found in cytosol
ex: enzymes catalyze 1st steps of sugar breakdown |
Free ribosomes-
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