04 - Membrane Structure

Question 1

Phospholipid

Answer 1

Similar to fod molecule, has only 2 fatty acids attracted to glycerol

Question 2

Fatty acid

Answer 2

Long carbon skeleton

Question 3

Plasma membrane

Answer 3

Controls what goes into and out of cell

Question 3

Phospholipid bilayer

Answer 3

Forms boundary between cell and external environment

Question 4

Hydrophobic

Answer 4

Attracted to water

Question 5

Amphipathic

Answer 5

A phospholipid that is both hydrophilic and hydrophobic

Question 6

Integral membrane protein

Answer 6

Protein permanently attached to a membrane

Question 7

Transmembrane protein

Answer 7

A transmembrane protein is a type of protein that spans across the entire cell membrane. It has parts that stick out on both the inside and outside of the cell

Question 8

Peripheral membrane protein

Answer 8

A peripheral membrane protein is a type of protein that is attached to the surface of the cell membrane but does not go through it, not embedded in lipid bilayer

Question 9

Plasma membrane

Answer 9

selective barrier that allows passage of O, nutrients, and wastes

Question 10

Cytoplasm

Answer 10

Interior of cell

Question 10

Cytosol

Answer 10

all cells, semi-fluid jellylike substance

Question 11

Fluid mosaic model

Answer 11

Mosaic of protein molecules bobbing in a fluid bilayer of phospholipids

Question 12

Cholesterol

Answer 12

type of steriod, crucial molecule in animals

Question 13

Glycoproteins

Answer 13

Glycoproteins are proteins that have sugar molecules attached to them. Molecules, proteins, and carbohydrates chains

Question 14

Glycolipids

Answer 14

Glycolipids are molecules made up of fats (lipids) with sugar molecules attached to them

Question 15

Extracellular matrix

Answer 15

Complex network of proteins (glycoproteins) and other molecules secreted by cells that surrounds and supports them

Question 16

What does cholesterol do to membrane fluidity ?

Answer 16

Cholesterol helps regulate the fluidity of cell membranes. It makes the membrane less fluid at higher temperatures, preventing it from becoming too loose and unstable

Question 17

What do unsaturated phospholipids do to membrane fluidity ?

Answer 17

Unsaturated phospholipids increase membrane fluidity, more spacious

Question 18

Higher temperatures and membrane fluidity?

Answer 18

Higher temperatures increase membrane fluidity, less tightly packed

Question 19

Colder temperatures and membrane fluidity ?

Answer 19

Colder temperatures decrease membrane fluidity, more tightly packed