1.1: Introduction to biological molecules Flashcards
1
Q
A polar molecule
A
A polar molecule is a molecule that:
- Does not have the same charge across the molecule
- Has opposing charges
SAJID A Level AQA Biology (69 decks)
- 1.1: Introduction to biological molecules
- Transport Across Cell Membranes
- Homeostasis - blood glucose
- Recombinant DNA Technology
- Transport across Membranes
- 1.4: Starch, glycogen and cellulose
- 1.5: Lipids
- 1.6: Proteins
- 1.7: Enzyme action
- 1.8: The factors affecting enzyme action
- 1.9: Enzyme inhibition
- 2.1: The structure of RNA and DNA
- 2.2: DNA replication
- 2.3: Energy and ATP
- 3.1: The methods of studying cells
- 3.2: The electron microscope
- 3.3: Microscopic measurements and calculations
- 3.4: Eukaryotic cell structure
- 3.5: Cell specialisation and organisation
- 3.6: Prokaryotic cells and viruses
- 3.7: Mitosis
- 3.8: The cell cycle
- 4.1: The structure of the cell surface membrane
- 4.2: Diffusion
- 4.3: Osmosis
- 4.4: Active transport
- 4.5: Co-transport and absorption of glucose in the ileum
- 5.1: Defence mechanisms
- 5.2: Phagocytosis
- 5.3: T lymphocytes and cell mediated immunity
- 5.4: B lymphocytes and humoral immunity
- 5.5: Antibodies
- 5.6: Vaccination
- 5.7: Human immunodeficiency virus (HIV)
- 6.1: Exchange between organisms and their environment
- 6.2: Gas exchange in single-celled organisms and insects
- 6.3: Gas exchange in fish
- 6.4: Gas exchange in the leaf of a plant
- 6.5: Limiting water loss
- 6.6: The structure of the human gas-exchange system
- 6.7: The mechanism of breathing
- 6.8: The exchange of gases in the lungs
- 6.9: Enzymes and digestion
- 6.10: The absorption of the products of digestion
- 7.1: Haemoglobin
- 7.2: The transport of oxygen by haemoglobin
- 7.3: The circulatory system of a mammal
- 7.4: The structure of the heart
- 7.5: The cardiac cycle
- 7.6: Blood vessels and their functions
- 7.7: The transport of water in the xylem
- 7.8: The transport of organic molecules in the phloem
- 7.9: Investigating transport in plants
- 8.1: Genes and the triplet code
- 8.2: DNA and chromosomes
- 8.3: The structure of ribonucleic acid
- 8.4: Protein synthesis - transcription and splicing
- 8.5: Protein synthesis - translation
- 9.1: Mutations
- 9.2: Meiosis and genetic variation
- 9.3: Genetic diversity and adaptation
- 9.4: The types of selection
- 10.1: Species and taxonomy
- 10.2: Diversity within a community
- 10.3: Species diversity and human activity
- 10.4: Investigating diversity
- 10.5: Quantitative investigations of variation
- 6.1 Exchange
- 6.1 - Exchange with environment
