Eukaryotic cells vs prokaryotic cells; plant cells vs animal cell; CM in eukaryotes

Question 1

plasmalemma is aka _____________

Answer 1

cell membrane

Question 2

how was the CM discovered?

Answer 2

electron microscope in RBC

Question 3

T/F
lipid molecule is called amphipathic molecule because it has both polar and non-polar regions

Answer 3

True

Question 4

T/F
In a lipid molecule, the hydrophilic head is polar whereas the tails are non-polar

Answer 4

TRUE

Question 5

T/F
In a lipid molc, the tail is hydrophilic

Answer 5

false

Question 6

In a lipid molc, the head is hydrophilic

Answer 6

truer

Question 7

carrier proteins are req. for ________

Answer 7

osmosis

Question 8

tunnel proteins are req. for ________

Answer 8

transportation

Question 9

what are the types of gen. lipids

Answer 9

1. lecithin
2. cephalin
   3.galactopipid

Question 10

T/F
a cholesterol molc is found in all types of cells

Answer 10

False
only in animal cells

Question 11

what is the comp. of CM in RBC

Answer 11

52% lipids
40% proteins
8% carbs

Question 12

What does the quasi-fluid model primarily describe?

a. The behavior of solid materials under stress

b. The dynamic properties of cell membranes

c. The flow of fluids in a vacuum

d. The interaction between gases and liquids

Answer 12

b. The dynamic properties of cell membranes

Question 13

Which component of the cell membrane is most associated with the quasi-fluid model?

a. Proteins
b. Lipids
c. Carbohydrates
d. Nucleic acids

Answer 13

b. Lipids

Question 14

What property of the lipid bilayer allows it to be described as quasi-fluid?

a. Its rigidity

b. Its ability to self-repair

c. Its lateral movement of molecules

d. Its impermeability to water

Answer 14

c. Its lateral movement of molecules

Question 15

What is the significance of the quasi-fluid model in biological systems?

a. It explains the rigidity of cell walls.

b. It helps understand membrane protein interactions.

c. It describes the process of DNA replication.

d. It predicts the behavior of enzymes in the cytoplasm.

Answer 15

b. It helps understand membrane protein interactions

Question 16

What is bulk transport in cells?

Transport using vesicles without energy

Transport from low to high concentration using ATP

Transport from high to low concentration without energy

Transport of charged molecules using carrier proteins

Answer 16

Transport using vesicles without energy

Question 17

Which type of transport requires ATP?

Bulk transport

Active transport

Passive transport

Diffusion

Answer 17

Active transport

Question 18

What is an example of active transport?

Diffusion of lipids

Osmosis of water

Na+ and K+ pump

Pinocytosis

Answer 18

Na+ and K+ pump

Question 19

What is passive transport?

Transport using vesicles without energy

Transport from low to high concentration using ATP

Transport from high to low concentration without energy

Transport of charged molecules using carrier proteins

Answer 19

Transport from high to low concentration without energy

Question 20

Which process is an example of passive transport?

Na+ and K+ pump

Diffusion of lipids

Pinocytosis

Phagocytosis

Answer 20

Diffusion of lipids

Question 21

How is water transported in passive transport?

By diffusion

By osmosis

By carrier proteins

By vesicles

Answer 21

By osmosis

Question 22

Which molecules are transported by carrier proteins?

Lipids

Water

Charged molecules

Non-charged molecules

Answer 22

Charged molecules

Question 23

What is endocytosis?

The process of expelling materials from the cell

The intake of materials into the cell using vesicles

The movement of water across a membrane

The transport of charged molecules using carrier proteins

Answer 23

The intake of materials into the cell using vesicles

Question 24

What is pinocytosis? Cell eating process Cell drinking process Transport of charged molecules Diffusion of lipids

Answer 24

Cell drinking process

Question 25

Where is pinocytosis commonly observed? White blood cells Small intestine Spleen Protozoans

Answer 25

Small intestine

Question 26

What is phagocytosis? Cell drinking process Cell eating process Transport of lipids Transport of water

Answer 26

Cell eating process

Question 27

Which cells perform phagocytosis? Small intestine cells White blood cells Liver cells Muscle cells

Answer 27

White blood cells

Question 28

What type of molecules are lipids and water? Charged molecules Non-charged molecules Ions Proteins

Answer 28

Non-charged molecules

Question 29

Which type of transport is used for charged molecules? Diffusion Osmosis Carrier proteins Pinocytosis

Answer 29

Carrier proteins

Question 30

What is the main difference between active and passive transport? Active transport requires ATP, while passive transport does not. Active transport moves substances from high to low concentration. Passive transport requires ATP, while active transport does not. Passive transport moves substances from low to high concentration.

Answer 30

Active transport requires ATP, while passive transport does not.