BIO 264 5.1

Oligosaccharide

A person has type A blood. Which of the following would be found as a membrane marker to determine this type of blood? Phospholipid Glycogen Monosaccharide Oligosaccharide

protein and lipid

Cell membranes are primarily made of which of the following? cytoskeleton and lipid Protein and lipid Elastin and collagen Dense fibrous connective tissue

are carbohydrate-binding lipids

Glycolipids __________.

none of the above

How does the phospholipid bilayer maintain separation between the spaces inside and outside the cell? The negative charge outside the cell keeps positively charged molecules inside the cell The polar portion of the phospholipid membrane does not allow water to move across the membrane Proteins in the membrane can only move atoms and molecules in one direction None of the above

phospholipids, cholesterol, proteins

In the plasma membrane, _________ form(s) the lipid bilayer, __________ determine(s) the fluid nature of the membrane, and _________ mainly determine(s) the function of the membrane.

glycoprotein

Blood types are the results of __________specific markers.

Fluid mosaic model

The best description of the modern model of the cell membrane is termed the ________.

peripheral proteins

The cells at the base of your skin layers have proteins called hemi desmosomes that attach to the collagen rich tissue just deep to the basal cells. Given what you have learned about proteins in cell membranes, hemi desomosomes sound like ______________.

all of the above

The different types of proteins in the plasma membrane include _____________. integral proteins peripheral proteins receptor proteins all of the above none of the above

provide stability to the plasma membrane by limiting the movement of phospholipids

The function of cholesterol in the plasma membrane is ____________________________.

Regulation of transportation in and out of the cell

Which of the following is a function of the cell membrane? Regulation of cell division Regulation of transportation in and out of the cell Production of ATP Production and packaging of proteins

Regulation of cell division

Which of the following is not a function of the cell membrane? Regulation of cell division Regulation and site of exchange with the environment Structural support of the cell Recognition of substances outside of the cell

Stability of the plasma membrane

Which of the following is not one of the functions of the membrane proteins? Marker molecules Receptor proteins Stability of the plasma membrane Enzymes

The phospholipid tails are hydrophobic, meaning they dislike water and turn away from it

Which of the following is true concerning phospholipids? The phosphate head is hydrophobic, meaning it dislikes water and turns away from it. A single layer of phospholipids is sufficient to make a cell membrane. The phospholipid tails are hydrophobic, meaning they dislike water and turn away from it. All of the above are true.

GTP = necessary for alpha subunit dissociation from G protein coupled receptor

Which of the following word or phrase pairs are correctly matched? Alpha subunit = binds to the G protein coupled receptor ligand Beta subunit = binds ATP to activate cellular response Gamma subunit = inactivates the alpha subunit G protein coupled receptor = a ligand gated ion channel GTP = necessary for alpha subunit dissociation from G protein coupled receptor

Glycogen

Which of the following words does not belong with the other three? Glycolipid Glycogen Glycoprotein Glycocalyx

Integral proteins

Which type of protein extends through the full width of the cell membrane? Peripheral proteins Glycoproteins Integral proteins Phosphoproteins

Cholesterol helps regulate the fluidity of a cell membrane by limiting lateral movement of the phospholipids.

Why is cholesterol important to a cell membrane?

a bilayered phospholipid structure

he basic structure of the plasma membrane is formed by __________________.