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National 5 Biology Unit 1 Proteins and Enzymes Questions and Answers | Latest Version | 2025/2026 | Correct & Verified
What type of bond links amino acids together in proteins?✔✔Peptide bonds
What determines the shape and function of a protein?✔✔The sequence of amino acids
What happens to an enzyme when it is denatured?✔✔Its active site changes shape and it no longer works
What name is given to the part of the enzyme where the substrate fits?✔✔Active site
What is meant by enzyme specificity?✔✔Each enzyme works with only one substrate 1 / 2
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What effect does high temperature have on enzyme activity?✔✔It can denature the enzyme and stop its activity
What is the optimum temperature for most human enzymes?✔✔Around 37°C
What happens to the rate of an enzyme reaction if the temperature is too low?✔✔It slows down because particles move less
What happens to enzymes at very high temperatures?✔✔They become denatured
What is the result of a synthesis reaction catalysed by an enzyme?✔✔A larger molecule is made from smaller molecules
What is the result of a degradation reaction catalysed by an enzyme?✔✔A larger molecule is broken down into smaller molecules
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