Topic 13 + 14: Enzymes in Synthesis and Nucleotides

What is one of the primary roles of enzymes in biological systems?

• To provide energy for cellular processes

• To act as catalysts and speed up chemical reactions

• To store genetic information

• To transport molecules across cell membranes

Which of the following is an advantage of using enzymes as catalysts in synthesis applications?

• Enzymes are highly specific and can reduce side reactions

• Enzymes are unstable and degrade quickly

• Enzymes require high temperatures to function

• Enzymes are non-selective and can catalyse any reaction

What is a disadvantage of using enzymes in industrial applications?

• Enzymes are highly specific

• Enzymes can be expensive to produce and purify

• Enzymes work at low temperatures

• Enzymes are biodegradable

Which of the following is NOT one of the six major types of enzyme-catalysed reactions?

• Oxidoreductases

• Transferases

• Polymerases

• Hydrolases

What is a common disadvantage of using whole cells instead of purified enzymes?

• Whole cells are more stable

• Whole cells can have unwanted side reactions

• Whole cells are easier to handle

• Whole cells are more specific

Which of the following is a type of biological catalyst other than enzymes?

• DNA

• RNA

• Lipids

• Carbohydrates

What is the role of thymidylate synthase in nucleotide metabolism?

• It synthesises ATP

• It converts dUMP to dTMP

• It breaks down nucleotides

• It synthesises CTP

Which nucleotide base pairs with adenine in DNA?

• Cytosine

• Guanine

• Thymine

• Uracil

What stabilising interaction is crucial for the structure of DNA?

• Ionic bonds

• Hydrogen bonds

• Covalent bonds

• Van der Waals forces

Which enzyme is responsible for the synthesis of CTP?

• DNA polymerase

• RNA polymerase

• CTP synthetase

• Thymidylate synthase