Biology HL Review from test 1

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  • Created by: Foxic
  • Created on: 13-05-15 08:06
List the functions of membrane proteins
1. Hormone binding sites 2. Immobilized enzymes with active site on outside 3. Cell adhesion to form tight junctions between cells in tissues/organs 4. Cell-to-cell communication 5. Pumps for active transport that use ATP
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What are examples of membrane proteins with the functions listed?
1. Insulin receptor 2. In small intestine 3. 4. Neurotransmitter at synapses 5. Sodium-potassium pump
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Define an organic substance
Substances with carbon covalently bonded to N,O, andH atoms
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What is the role of the rER?
To produce/translate proteins
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Outline the significance to organisms of the different properties of water
1. Solvent: chemical rxns 2. Many substances dissolve in water and can be transported 3. Coolant (sweat) 4. Transport in plants (cohesion water molecules) 5. High SHC (stable internal/external environment)
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Outline differentiation of cells in a multicellular organism
1. Cells have all genes, some are expressed 2. Position/hormones/cell to cell signals/chemicals determine development 3. Differentiation is development in specific ways 4. Cells carry out specialized functions
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Discuss possible exceptions to cell theory
1. Skeletal muscle fibres (larger, multinucleated) 2. Unicellular organisms considered acellular (carry out all life functions) 4. Fungal hyphae sometimes not divided into individual cells
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Card 2

Front

What are examples of membrane proteins with the functions listed?

Back

1. Insulin receptor 2. In small intestine 3. 4. Neurotransmitter at synapses 5. Sodium-potassium pump

Card 3

Front

Define an organic substance

Back

Preview of the front of card 3

Card 4

Front

What is the role of the rER?

Back

Preview of the front of card 4

Card 5

Front

Outline the significance to organisms of the different properties of water

Back

Preview of the front of card 5
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