GCSE BIOLOGY AQA Organization EXAM REVISION QUESTIONS
WITH VERIFIED SOLUTIONS LATEST 2025 UPDATE.
Metabolism - ANSWER- The sum of all reactions in the body
biological catalyst - ANSWER- What is an enzyme?
active site - ANSWER- What part of an enzyme binds to substrates?
salivary glands and pancreas - ANSWER- Where in the body is amylase produced?
starch into sugars - ANSWER- What does amylase break down?
stomach and pancreas - ANSWER- Where are proteases produced in the body?
proteins (into amino acids) - ANSWER- What do proteases break down?
salivary glands and pancreas - ANSWER- Where are lipases produced?
lipids (fats) into glycerol and fatty acids - ANSWER- What do lipases break down?
small intestine - ANSWER- Where are nutrients absorbed into the blood
enzymes chemically digest food, teeth and tongue physically digest food - ANSWER- What
happens at the mouth?
, chemicals in food being broken down by enzymes - ANSWER- What is chemical digestion?
crushing and churning food to break it into small chunks - ANSWER- What is physical
digestion?
To make smaller chunks which have a larger surface area for enzymes to break down. - ANSWER-
Why do we physically digest for?
To convert food into small, soluble molecules that can be absorbed into the blood - ANSWER-
Why do enzymes need to chemically digest food?
The walls churn it - ANSWER- How does the stomach physically digest food?
To provide an optimum environment for the enzymes and to kill pathogens. - ANSWER- Why
is the stomach acidic?
pH 2 - ANSWER- What pH is the stomach approximately?
pancreas - ANSWER- What organ produces lots of enzymes and releases them in pancreatic
juices?
small intestine - ANSWER- Where are pancreatic juices released into?
liver - ANSWER- Where is bile made?
gall bladder - ANSWER- Where is bile stored and released from?
Slightly alkaline - ANSWER- What pH is in the small intestine
WITH VERIFIED SOLUTIONS LATEST 2025 UPDATE.
Metabolism - ANSWER- The sum of all reactions in the body
biological catalyst - ANSWER- What is an enzyme?
active site - ANSWER- What part of an enzyme binds to substrates?
salivary glands and pancreas - ANSWER- Where in the body is amylase produced?
starch into sugars - ANSWER- What does amylase break down?
stomach and pancreas - ANSWER- Where are proteases produced in the body?
proteins (into amino acids) - ANSWER- What do proteases break down?
salivary glands and pancreas - ANSWER- Where are lipases produced?
lipids (fats) into glycerol and fatty acids - ANSWER- What do lipases break down?
small intestine - ANSWER- Where are nutrients absorbed into the blood
enzymes chemically digest food, teeth and tongue physically digest food - ANSWER- What
happens at the mouth?
, chemicals in food being broken down by enzymes - ANSWER- What is chemical digestion?
crushing and churning food to break it into small chunks - ANSWER- What is physical
digestion?
To make smaller chunks which have a larger surface area for enzymes to break down. - ANSWER-
Why do we physically digest for?
To convert food into small, soluble molecules that can be absorbed into the blood - ANSWER-
Why do enzymes need to chemically digest food?
The walls churn it - ANSWER- How does the stomach physically digest food?
To provide an optimum environment for the enzymes and to kill pathogens. - ANSWER- Why
is the stomach acidic?
pH 2 - ANSWER- What pH is the stomach approximately?
pancreas - ANSWER- What organ produces lots of enzymes and releases them in pancreatic
juices?
small intestine - ANSWER- Where are pancreatic juices released into?
liver - ANSWER- Where is bile made?
gall bladder - ANSWER- Where is bile stored and released from?
Slightly alkaline - ANSWER- What pH is in the small intestine
