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Three theories for DNA replication at the time: Conservative replication: When DNA was replicated, entirely new molecules of DNA were made, meaning a newly replicated DNA molecule ...

Think of them as a flow chart.

Stimulus (a change)
    |
Sensor (detects the change)
    |
Control (sends a signal about t...

A copy of the gene to be coded in DNA is made from messenger RNA (mRNA). mRNA travels out of the nucleus and attaches to a ribosome. The ribosome joins amino acids together in the order determined by mRNA...

Explain the use of proteins as enzymatic catalyats - including examples.

Enyzmes control metabolic pathways - such as in the Krebs cycle.

Proteins/enzymes in photosynthesis - with examples.<...

Extracellular digestion is a process in which an organism feeds by secreting enzymes through its cell membrane and on to the food. These enzymes then catalyse the breakdown and the digestion of the food. ...