term 2- lec 2

• Are the building blocks of the nuclear lamina
• . They are mutated the premature aging disease Hutchinson-Gilford progeria syndrome
• Localise exclusively in the nucleus
• Regulate the electrical potential across the membrane (correct)

• Hold transmembrane adhesion proteins that anchor the cell to the extracellular matrix
• Membranes are the compartmentalization unit for cells and organelles.
• . Undergo steps of exocytosis and endocytosis and different fusion events around the cell and are involved in cell-cell fusion and viral entry
• They have receptors on other cells, they transmit forces to the cytoskeleton and holds Adenosine triphosphate (ATP)-driven enzymes or all of the above (correct)

• Can form the plasma membrane but only in eukaryotes.
• It is behind the plasma membrane and it is amphipathic
• Is the main constituent of the plasma membrane with a key characteristic of being amphiphilic. (correct)
• It is hydrophobic unless an electron gradient provides energy

<p>Have hydrophobic transmembrane domains (C)</p> Signup and view all the answers

<p>Pumps are enzymes that use energy from adenosine triphosphate (ATP), light, or (rarely) other sources to move ions (generally, cations) and other solutes across membranes at relatively modest rates (D)</p> Signup and view all the answers

<p>Carriers are ion-specific pores that typically open and close transiently in a regulated manner. b. Translocation of an ion down its concentration gradient can drive another ion or solute up a concentration gradient c. Carriers are also called secondary transporters d. An example of a carrier is the glucose transporter (A)</p> Signup and view all the answers