What feature of the plasma membrane is primarily responsible for the selective uptake and export of ions and molecules from the cell?
A. cellular membranes exhibit fluid-like properties
B. the phospholipid lipid bilayer has a hydrophobic interior
C. the extracellular leaflet is rich in glycolipids and glycoproteins
D. many transmembrane proteins can rotate and move laterally in the plasma membrane
B. the phospholipid lipid bilayer has a hydrophobic interior
You might also like to view...
Winogradsky columns ________.
A. are used in the process of isolating nanobacteria B. are typically used to isolate aquatic protozoa C. are used in the process of isolating aquatic viruses (virioplankton) D. are used as a model system for studying microbial interactions
The fungi that cause serious plant disease, such as Dutch elm disease and chestnut blight, belong to the phylum
A. Ascomycota. B. Zygomycota. C. Imperfect fungi. D. Basidiomycota. E. Actinomycetes.
Where would you expect to find the Ca2+-activated form of gelsolin in cells crawling by amoeboid movement?
A) in and around focal adhesions B) at a pseudopodium tip where endoplasm is converting to ectoplasm C) at a pseudopodium base where ectoplasm is converting to endoplasm D) in the primary cilium E) at the cell trailing edge where force is produced to drive endoplasm forward streaming
Each time a molecule of glucose (C6H12O6) is completely oxidized via aerobic respiration, how many oxygen molecules (O2) are required?
A) 1 B) 2 C) 6 D) 12 E) 38