Complete the sentences by putting a cross (X) in the box next to your answer - Edexcel - GCSE Biology - Question 5 - 2012 - Paper 1
Question 5
Complete the sentences by putting a cross (X) in the box next to your answer.
(i) Enzymes are
A cells
B hormones
C proteins
D sugars
(ii) An enzyme is a bi... show full transcript
Worked Solution & Example Answer:Complete the sentences by putting a cross (X) in the box next to your answer - Edexcel - GCSE Biology - Question 5 - 2012 - Paper 1
Step 1
Enzymes are
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Answer
Choose 'C' proteins. Enzymes are biological molecules that catalyze chemical reactions. They are largely composed of proteins, which allow them to have a specific structure and function.
Step 2
An enzyme is a biological catalyst that
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Answer
Choose 'B' speeds up a chemical reaction. Enzymes lower the activation energy needed for reactions to occur, thus increasing the rate at which these reactions proceed.
