Chapter 5: 5.2

Question 1

How does temperature effect the shape and structure of the membrane?

Answer 1

If you increase temperature….

• As temp increases phospolipid will have more energy then move more
• As a result making the phospholipid move more and cause them to lose its structure. When temperature increase, the cell will begin to break down immediately
• This causes a weaker structure which increases the softness of the membrane = this allowing particles to easily cross it now the membrane stops controlling movement of substances

Question 2

What happen when a membrane loses its’ structure?

Answer 2

• they lose their ability to control of what substance can enter the cell cytoplasm and what substances cannot enter the cells cytoplasms
• it disrupts life processes

Question 3

What factors effect the structure of the membrane?

Answer 3

• Temperature
• if there is a presence of a solvent
• ph

Question 4

How does temperature effect the protein that is present in the membrane?

Answer 4

• Temperature will cause glyocprotein to denature

- As a result, this was will create an effect on membrane structure

Question 5

What type of solvents is effect the structure of membranes?

Answer 5

Many Organic solvents that are non-polar

Non polar molecules

Question 6

How is organic/non-polar solvents effect the structure of the membrane?

Answer 6

• Organic solvents dissolves with the membrane causing a disruption in the cells in the membrane. Were with polar molecules presence between the phospholipids in the exit the cause disruption membrane
• As a result, disruption of the membrane causes it to become fluid lost its structure. (as a result this might stop cells from functioning very well)

Question 7

Give examples of organic solvents?

Answer 7

Alcohols

Question 8

What is the structure of the phospholipid bilayer?

Answer 8

• Polar tails of the phospholipids are orientated inside/inwards from the water. This forms a bilayer with a hydrophilic core
• The charged phosphate heads share ions with water helping the bilayer intact.

Question 9

Why is alcohol used to kill bacteria?

Answer 9

this is because alcohols damage the membranes of the bacteria in the wound killing them and reducing their metabolism

Question 10

Why do alcoholic drinks don’t cause damage?

Answer 10

as they are in small quantities so does not dissolve mebranes