GCSE Biology Paper 1 Organisation

Reorder the following

• Cell

• Organ

• Organism

• Organ System

• Tissue

Label the Digestive System

e

f

g

h

a

b

c

d

Small intetine

Pancreas

Oesophagus

Liver

Salivary Glands

Large Intestine

Stomach

Gall Bladder

What organ produces bile?

Where is bile stored?

Where is hydrochloric acid produced?

Where are the majority of soluble nutrients absorbed?

Where are the majority of water absorbed from the faeces?

Which organ produces and secretes enzymes such as proteases, lipases and carbohydrases ?

Label the Diagram

b

c

d

e

a

Product

Active Site

Enzyme

Enzyme Substrate Complex

Substrate

In the "Lock and Key" theory the ​ (a)   is a the lock and the ​ (b)   is the key. The active site is on the ​ (c)   and has a specific shape that is complementary to the ​ (d)   .

• enzyme
• substrate