Science Re take :-)

Identify parts of the cell and describe their function?

State that the coded information is carried in the form of DNA in genes on chromosomes?

State that one gene codes for one protein and that most have their effect by the production of enzymes?

Chloroplasts to absorb light energy for photosynthesis. A cell wall to help support the plant. A large vauole that stores cell sap and also provides support. DNA is found in the nucleus.

Proteins are made by reading the code in DNA. DNA controls the production of proteins in a cell. A gene is a section of DNA that codes for a particular protein. Proteins are made up of chains of molecules called amino acids.

We get amino acids from our diet. If we don't take in all the amino acids in the right amounts, our body can change some of them into others. This is called transamination & it happens in the liver.

Describe diffusion and it's effect on movement of molecules into and out of cells

Describe the movement of substances such as digested food and gases into the blood stream and acorss the placenta in terms of diffusion

Describe the the movement of gases into and out of leaves and explain their loss of water in terms of diffusion.

Explain the diffusion of transmitter substances across synapses.

Diffusion is the passive movement of particles from an area of higher concentration to an area of lower concentration.

It happens in liquid and gases.

The rate of diffusion depeends on distance, gradient and surface area.

Diffusion happens in synapses..

When a nerve impulse arrives at synapse it triggers the release of a transmitter substance from the end of the next neurone.