Describe a catalyst as a substance that increases the rate of a chemical reaction and is not changed by the reaction
1 Answer Describe and be able to do chemical tests for: (a) starch (iodine solution) (b) glucose and maltose (Benedict’s solution) (c) protein (biuret test) (d) lipids (ethanol emulsion test)
1 Answer State that large molecules are made from smaller molecules, limited to: starch, cellulose and glycogen from glucose; proteins from amino acids; lipids from fatty acids and glycerol; DNA from nucleotides
1 Answer Explain the importance of active transport in ion uptake by root hair cells
1 Answer Describe active transport as the movement of molecules or ions into or out of a cell through the cell membrane, from a region of their lower concentration to a region of their higher concentration (i.e. against a concentration gradient), using energy released during respiration
1 Answer Investigate osmosis using materials such as dialysis tubing
1 Answer Investigate and explain the effects on plant tissues of immersing them in solutions of different concentrations, using the terms turgid, turgor pressure, plasmolysis and flaccid
1 Answer Describe the effects of osmosis on plant and animal tissues and explain the importance of water potential gradient and osmosis in the uptake and loss of water
1 Answer Understand that plants are supported by the pressure of water inside the cells pressing outwards on the cell wall
1 Answer Investigate the factors that influence diffusion, limited to: surface area, temperature, concentration gradient and distance
1 Answer
Sourav Pan
Sourav Pan
Sourav Pan
Sourav Pan
Sourav Pan
Sourav Pan
Sourav Pan
BNO Team