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22 Cards in this Set

  • Front
  • Back
What type of ribosomes do the mitochondria of eukaryotes have?
Viroids? Structure?
Single stranded circular RNA that forms a seemingly double stranded structure by intra-strand base pairing.
Do viroids code for protein? What do they do? Where are they found?
-They interfere with regulatory RNA
-Found in plants; no animal forms known
polypeptides that cause pre-existing healthy proteins in an organism to misfold and cause neurodegeneration
The cytoplasmic membrane consists of?

General size?
-Phospholipids and Proteins

-6-8 nanometers wide
Some peripheral proteins are _________ and have been shown to have a lipid tail on the ___________ of proteins that serves to anchor one portion of protein to the membrane
-amino terminus
proteins that have both hydrophobic and hydrophillic regions are called ______?
Plasma membrane's effect on polar solutes?
polar solutes do not readily move passively across the membrane
Plasma membrane's effect on small nonpolar and fat soluble substances like fatty acids, alcohols, and benzene?
They may enter or exit cell by dissolving in lipid phase and diffusing through it.
Plasma membrane's effect on charged molecules such as amino acids, organic acids, and inorganic salts
They do not readily pass through membrane but instead must be transported by specific mechanisms
Plasma membrane's effect on water?
Water is uncharged (weakly polar) and small enough to penetrate membrane by passing between phospholipid molecules: accelerated by aquaporins: proteins that form membrane spanning channels that specifically transport water
Plasma membrane's effect on very large molecules like polysaccharides, protein, and lipids?
They do not pass through membrane. Must be hydrolyzed by extracellular enzymes and smaller units transported in
spherical or ovoid
Rod or bacillus?
rod twists or spiirals
long, helically coiled (spiral-shaped) cells
half moon
divide in 1 plane & stay together for 1 division; pairs
divide in one plane & remain together for many divisions; chains
divide in many planes and remain attached; like bunch of grapes
1 plane & then perpendicular plane
like tetra & plane cross sections behind; cuboidal packets