B1a Molecules Of Life

Molecules Of Life

Cell Structure:

Animal Cells Contain a....

• Nucleus which controls the cells activities.
• Cell Membrane which holds the cell together and controls what goes in and out of the cells.
• Cytoplasm where most of the cells reactions take place.
• Mitochondria where most of the reactions involved in respiration take place.
• Ribosomes where proteins are synthesised.

Plants Cell's Contain all the structures of an animal cell but also contain ....

• Chloroplasts where photosynthesis takes place.
• Cell Wall which contains cellulose which strengthens the cell. (Supports it).
• Vacuole filled with cell sap to support the cell.

DNA

The Nucleus contains genes. Each Gene:

• Is a section of a Chromosome made of DNA.
• Codes for a particular protein.

DNA is made of 2 strands coiled to form a double helix, each strand containing chemicals called bases. There are 4 different types of bases, with cross-links between the strands formed by pairs of bases. Each…