- B1 ✏︎ Molecules -
B1.1 - Carbohydrates
LECTURE VIDEO
DESCRIPTION
They’re not just pasta—they’re your body’s primary fuel source and a structural marvel. Unwrap the sweet science of carbohydrates for A-Level Biology. This video breaks down the sugars, from the simplest monosaccharides to the complex polymers. We’ll make it crystal clear:
- How a glucose molecule is structured (and why its isomerism matters).
- The difference between glycogen, starch, and cellulose(and why you can digest one but not the other).
- Why cellulose is the ultimate plant superhero.
Stop cramming and start understanding the energy of life.
TIMESTAMPS
STUDY RESOURCES
00:00 – The Macromolecules
01:21 – Monosaccharide, Disaccharide, & Polysaccharide
03:52 – Digestion Of Glycogen/Starch To Glucose
10:01 – Alpha Glucose Use Overview
11:50 – Hydrolysis & Condensation
14:58 – Alpha Glucose Structure
19:46 – Properties Of Glucose
21:20 – Beta VS Alpha Glucose Structure
23:10 – Quick Recap
23:51 – Ribose
26:06 – Glucose Use: ATP Formation
27:36 – Glycogen Formation (Animals)
34:11 – Starch Formation (Plants)
35:51 – Quick Recap
36:36 – Lactose
39:06 – Sucrose
40:16 – Quick Recap
41:12 – Cellulose
46:07 – Conjugated Molecules
47:28 – Glycoproteins & Function
52:43 – Questions & Answers
54:19 – Summary
NOTES – All you need to know in one place!
QUESTIONS – Test your Big Brain!
B1.1 - Lipids
LECTURE VIDEO
DESCRIPTION
They’re not just fats (that give you a triple chin)—they’re insulation, protection, and a powerhouse of energy storage. Dive into the hydrophobic world of lipids for A-Level Biology. This video cuts through the grease to explain:
- The structure of a triglyceride and why it’s so efficient for storage.
- The undeniable difference between saturated & unsaturated fats (no confusion!).
- The amazing dual-nature of the phospholipid and why it’s the foundation of every cell membrane.
Understand the molecules that shape your cells and store your energy.
TIMESTAMPS
STUDY RESOURCES
00:00 – The Macromolecules
01:21 – What Are Lipids?
04:19 – Adipose Tissue
05:14 – Functions Of Lipids
13:53 – Basic Chemistry Knowledge
17:01 – The Fatty Acid
19:57 – Saturated, Mono & Poly Unsaturated
24:24 – Properties Of Fatty Acids
25:31 – Triglycerides Explained (Lipid)
33:11 – Condensation + Hydrolysis
34:23 – Solvent Property Of Lipids
36:06 – Eating & Digesting Triglycerides
38:43 – Phospholipids Explained (Lipid)
43:58 – Cholesterol & Steroid Hormones Explained (Lipid)
49:29 – Questions & Answers
NOTES – All you need to know in one place!
QUESTIONS – Test your Big Brain!
B1.2 - Proteins
LECTURE VIDEO
DESCRIPTION
They’re the most diverse molecule in your body. From enzymes to antibodies, proteins do it all. Decode the complexity of proteins for A-Level Biology. This video is your guide to the building blocks of life. We’ll make sure you understand:
- The 4 levels of protein structure (primary to quaternary) and the bonds that hold them together.
- How a single amino acid change can cause a disease like sickle cell anemia.
- Why shape is everythingfor enzyme function.
Learn the language of life, one amino acid at a time.
TIMESTAMPS
STUDY RESOURCES
00:00 – Intro To Macromolecules
02:02 – DNA Codes For Proteins
03:45 – Examples Of Proteins
09:21 – Amino Acids Form Proteins
12:33 – Essential VS Non-Essential Amino Acids
16:31 – Amino Acid STRUCTURE
22:36 – Linking 2 Amino acids (Peptide Bond)
28:42 – Condensation & Hydrolysis
29:58 – Polypeptide Structure
30:47 – Protein Digestion & Absorption
34:11 – Denaturation & Renaturation
40:17 – IB Questions & Answers
NOTES – All you need to know in one place!
QUESTIONS – Test your Big Brain!
B1.2 (HL) - Proteins
LECTURE VIDEO
DESCRIPTION
They’re the most diverse molecule in your body. From enzymes to antibodies, proteins do it all. Decode the complexity of proteins for A-Level Biology. This video is your guide to the building blocks of life. We’ll make sure you understand:
- The 4 levels of protein structure (primary to quaternary) and the bonds that hold them together.
- How a single amino acid change can cause a disease like sickle cell anemia.
- Why shape is everythingfor enzyme function.
Learn the language of life, one amino acid at a time.
TIMESTAMPS
STUDY RESOURCES
00:00 – DNA Codes For Proteins
01:39 – Diversity In Proteins
02:26 – Amino Acids Structure
04:51 – R-Groups
09:19 – Primary, Secondary, Tertiary & Quaternary Structure
16:04 – Primary Structure Explained
17:36 – Secondary Structure Explained
23:15 – Tertiary Structure Explained
30:55 – Primary Structure determines folding
31:39 – Protein Solubility (Eg Lipase & Glycoprotein)
37:49 – Quaternary Structure Explained
38:21 – Insulin (Unconjugated Protein)
41:01 – Collagen (Unconjugated Protein)
42:08 – Hemoglobin (Conjugated Protein)
44:41 – Globular VS Fibrous Protein
46:07 – Quick Recap
47:08 – Questions & Answers
NOTES – All you need to know in one place!
QUESTIONS – Test your Big Brain!