Brocks Chapter 2: Flashcards

Both transportation of waste out of and nutrient into the cell occurs in the…

Cytoplasmic membrane

Cytoplasmic membrane of ALL bacterial and eukaryal cells is a…

phospholipid bilayer containing embedded proteins

Archaeal lipids can have many different…

isoprenoid (hydrophobic tail) chains including some that contain ring structures (eg crenachaeol in Thaumarchaeota)

Archaea may form a lipid bilayer or a lipid monolayer or…

a mix of both

Transport proteins typically display…

high sensitivity and high specificity

If there is enough of a nutrient to completely saturate a transport protein, the cell can absorb nutrients at its fastest possible rate.

This can happen even when nutrient are present in very small amounts in nature.

Dissipation of proton motive force can be coupled to several energy requiring reactions such as…

transport, cell locomotion, and biosynthesis of ATP

The cytoplasmic membrane is a barrier to the diffusion of most substances…

especially polar or charged molecules

Simple transporters and the ABC System transport substances…

without chemically modifying them

A characteristic property of binding proteins…

is their extremely high substrate affinity