• Wrong document? Swap it for free
  • Written by students who passed
  • Immediately available after payment
  • Read online or as PDF
  • 4.6 TrustPilot
0
Sell
Where do you study
Your language
Start selling Create your account
  • Other
  • Biology AS level
To add items to your wishlist, you must be logged in
Document preview thumbnail
Preview 1 out of 2 pages
Interview

Cambridge AS level Biology Notes: Lipids explained by an A* student

0.0
(0 reviews)
- sold
2 pages
2020/2021 Written for academic year
Institution
Other
Course
Biology AS level
Document preview thumbnail
Preview 1 out of 2 pages

Cambridge AS level notes from unit 2 Biological molecules- Lipids. I achieved an A* for the Cambridge AS and A-Level Biology examination and an A* for the Cambridge GCSE Biology examination. I have summarized all the important points and included diagrams to aid understanding.

Content preview

LIPIDS
FATTY ACIDS ALCOHOLS AND ESTERS TRIGLYCERIDES

Contains the group -COOH Contains a -OH group (hydroxyl) attached The most common lipids
(carboxyl) to a carbon atom
Also called “fats and oils”
Large molecules have long Glycerol: 3 -OH groups
Insoluble in water/ hydrophobic
hydrocarbon tails attached to the
head ACID + ALCOHOL = ESTER Soluble in organic solvents (ether)

Unsaturated fatty acids:

• Contain double bonds(-
C=C-)
• Contains a lower amount
of hydrogen
• Form unsaturated lipids

Contains 1 double bond:

Monounsaturated fat

Contains more than 1 double
bond:

Polyunsaturated fat

Eg: Oil, plant lipids

Saturated fatty acids:
ROLES:
• Doesn’t have double
bonds • Acts as an energy reserve
• Because they have more
Eg: Animal lipids C-H bonds than
carbohydrates
• Acts as an insulator
against heat loss
• Acts as a metabolic
source of water (during
respiration)
• Acts as phospholipids

PHOSPHOLIPIDS
• One of the 3 fatty acid
molecules is replaced by
a phosphate group
• Phosphate head:
hydrophilic
• 2 fatty acid tails:
hydrophobic
Connected book
image
Mary Jones, Matthew Parkin Cambridge International AS and A Level Biology Workbook with CD-ROM
Publisher: 2016 ISBN: 9781107589476 Edition: Unknown

Document information

School year
200
Uploaded on
June 4, 2021
Number of pages
2
Written in
2020/2021
Type
Interview
Company
Unknown
Person
Unknown
Report Copyright Violation
$3.99
Wrong document? Swap it for free Within 14 days of purchase and before downloading, you can choose a different document. You can simply spend the amount again.
Written by students who passed
Immediately available after payment
Read online or as PDF
Seller avatar
akshanacooray
Sold
0
Followers
0
Items
6
Last sold
-

Browse related subjects

Subjects

  • cambridge
  • as and a level
  • as level
  • a level
  • highschool
  • international
  • examination
  • year 11
  • year 12
  • biology
  • diagrams
  • easy
  • biological molecules
  • lipids
  • notes
  • summary
  • a
  • a student

Why students choose Stuvia

Created by fellow students, verified by reviews

Quality you can trust: written by students who passed their tests and reviewed by others who've used these notes.

Didn't get what you expected? Choose another document

No worries! You can instantly pick a different document that better fits what you're looking for.

Pay as you like, start learning right away

No subscription, no commitments. Pay the way you're used to via credit card and download your PDF document instantly.

Student with book image

“Bought, downloaded, and aced it. It really can be that simple.”

Alisha Student

Working on your references?

Create accurate citations in APA, MLA and Harvard with our free citation generator.

Learn more Create citation
Working on your references?

Frequently asked questions