Which of the following membrane components is found in the greatest abundance on the inner leaflet of eukaryotic vesicles produced for secretion by the Golgi apparatus? phosphatidylethanolamine glycolipids phosphatidylinositol cholesterol phosphatidylserine

the structure of the plasma membrane is best described as: two layers of phospholipids stacked on top of each other, with proteins embedded in the phospholipids Oa single layer of proteins and polysachharides mixed together two layers of proteins stacked on top of each other O many sheets of peptidoglycan stacked on top of each other O one layer of triglycerides on top of a layer of proteins

Which of the following proteins is categorized as an integral, lipid-linked membrane protein? band 3.0 protein the Ras protein glycophorin A cytochrome c COX-1

The plasma membrane has a hydrophobic interior due to the two present in each phospholipid found in the phospholipid bilayer of the cell membrane. The plasma membrane allows some molecules to cross but not all. Therefore, the plasma membrane is said to be Molecules that are nonpolar and hydrophobic will cross the membrane with ease by Does this process require energy? When molecules move across the plasma membrane by passive transport, they will move down or with the_ from an area of concentration to an area of. concentration. Polar, hydrophilic molecules and charged ions will move across the plasma membrane by the process of_ This does not require energy, but it does require a A special case of diffusion is known as which is the movement of water across the plasma membrane. If a cell is placed into a solution that is hypertonic compared to the inside of the cell, the cell would If a cell is placed into a hypotonic solution compared to the inside of the cell, the cell water. would…

Cholesterol has which of the following effects on the plasma membrane of an animal cell? it makes the membrane more rigid at low temperatures, and more fluid at high temperatures it makes the membrane more rigid at both low temperatures and high temperatures it makes the membrane more fluid at high temperatures, and more rigid at low temperatures it makes the membrane more fluid at both high temperatures and low temperatures it makes the membrane more fluid at low temperatures, and more rigid at high temperatures

Peripheral membrane proteins O may noncovalently interact with phospholipid heads O contain many hydrophobic amino acid residues if found on the cytosolic leaflet but contain hydrophilic residues if found on the extracellular leaflet O contain only alpha helical membrane spanning domains O have covalently attached lipid or fatty acid anchors All of the other are true

Proteins are transported from the cytoplasm into the nucleus as well as mitochondria / chloroplasts. There is also a transport that goes via vesicles. Describe these three different transport systems and explain how the cell knows which protein should end up in which organelle.

Proteins that possess a signal sequence of substantially non-polar amino acids, but do not possess a signal sequence of several positively-charged amino acids, are destined for which cellular location? the peroxisome the endoplasmic reticulum the chloroplast the mitochondrion the cytosol