Chapter 7 Quiz Review

Question 1

How does steroid (CHOLESTROL) effect membrane at cooler & warmer temperature?

Answer 1

At warm temperature cholesterol restrains movement of phospholipids and at cool temperatures it maintains fluidity by preventing tight packing

Question 2

Integral proteins that span the membrane

Answer 2

Transmembrane proteins

Question 3

When molecules move down their conc. gradient without involving ATP, the process is called…

Answer 3

Passive transport

Question 4

When water moves across selectively permeable membrane from a region of lower to a higher solute concentration, the process is called……………………

Answer 4

Osmosis

Question 5

Diffusion of water is called………………

Answer 5

Osmosis

Question 6

What is the normal tonic condition for a plant cell?

Answer 6

Hypotonic

Question 7

An animal cell immersed in hypertonic solution will…….

Answer 7

crenate(shrivel)

Question 8

The channel protein that facilitates diffusion of water is called…..

Answer 8

Aquaporins

Question 9

Give an example of a pump that requires active transport system

Answer 9

Sodium/Potassium pump

Question 10

Vesicles are involved in what type of transport?

Answer 10

Bulk transport

Question 11

Cellular drinking is another name for…..

Answer 11

Pinocytosis

Question 12

Binding of ligands to receptors trigger vesicle formation in what kind of Bulk transport?

Answer 12

Receptor-mediated endocytosis

Question 13

What are the 3 types of Endocytosis

Answer 13

Phagocytosis, Pinocytosis, and Receptor-mediated endocytosis

Question 14

Movement of molecules across the cell membrane with the help of carrier proteins

Answer 14

Carrier mediated diffusion

Question 15

Give an example of carrier mediate diffusion

Answer 15

Glucose

Question 16

Proteins that penetrate the hydrophobic core

Answer 16

Integral proteins

Question 17

What is the function of Glycolipid and Glycoprotein on Plasma membrane

Answer 17

Glycolipids ad Glycoproteins help in cell to cell recognition

Question 18

Allowing some substances to cross it more easily that others

Answer 18

Selective permeability

Question 19

Molecules containing hydrophobic and hydrophilic regions?

Answer 19

Amphipathic molecules

Question 20

Proteins that are bound to the surface of the membrane

Answer 20

Peripheral proteins

Question 21

Name the six major functions of membrane proteins

Answer 21

Transport
Enzymatic activity
Signal transduction
Cell-cell recognition
Intercellular joining
Attachment to the cytoskeleton and extracellular matrix (ECM)

Question 22

Proteins that allow passage of hydrophilic substances across the membrane

Answer 22

Transport proteins

Question 23

Proteins that have a hydrophilic channel that certain molecules or ions can use as a tunnel

Answer 23

Channel proteins

Question 24

Proteins that bind to molecules and change shape to shuttle them across the membrane

Answer 24

Carrier proteins

Question 25

The difference in concentration of a substance from one area to another

Answer 25

Concentration gradient

Question 26

The ability of a solution to cause a cell to gain or lose water

Answer 26

Tonicity

Question 27

A solution in which solute concentration is the same as that inside the cell and no net movement of water across the plasma membrane

Answer 27

Isotonic solution

Question 28

A solution in which solute concentration is greater outside the cell; cell loses water

Answer 28

Hypertonic solution

Question 29

A solution in which solute concentration is greater inside the cell; cell gains water

Answer 29

Hypotonic solution

Question 30

The control of water balance

Answer 30

Osmoregulation

Question 31

Swelled plant cell

Answer 31

Turgid

Question 32

Plant cell in isotonic solution

Answer 32

Flaccid

Question 33

Plant cell in hypertonic solution

Answer 33

plasmolysis

Question 34

In what kind of diffusion does transport proteins speed the passive movement of molecules across the plasma membrane?

Answer 34

Facilitated diffusion

Question 35

What kind of proteins provide corridors that allow a specific molecule or ion to cross the membrane?

Answer 35

Channel proteins

Question 36

Name an example of a disease caused by malfunctions I specific transport systems (FROM POWERPOINT)

Answer 36

Cystinuria

Question 37

In what kind of transport does the transport vesicles migrate to the membrane, fuse with it, and release their contents?

Answer 37

Exocytosis

Question 38

In what kind of transport doe the cell takes in macromolecules by forming vesicles from the plasma membrane?

Answer 38

Endocytosis

Question 39

In what kind of transport does a cell engulf a particle in a vacuole?

Answer 39

Phagocytosis

Question 40

In what kind of transport does the molecules are taken up when extracellular fluid is “gulped” into tiny vesicles?

Answer 40

Pinocytosis

Question 41

Any molecule that binds specifically to a receptor site of another molecule

Answer 41

Ligand