Question 19 – Proteins - AQA A Level Biology Questions

Two enzymes, $P\mathbf{P}$ and $Q\mathbf{Q}$ , are proteins with quaternary structure that catalyse the same reaction, but they have different primary structures.

Describe what is meant by the tertiary structure of a protein.

Explain how two enzymes with different primary structures can catalyse the breakdown of the same substrate.

Scientists investigated the effect of pH ( $4.5\text{pH } 4.5$ and $8.0\text{pH } 8.0$ ) on the activity of enzymes $P\mathbf{P}$ and $Q\mathbf{Q}$ .

Figure 1 shows their results.

Figure 1: Product concentration over time at different pH values.

Describe what the scientists should place in the control tubes in this investigation.

State three conclusions you can make from the results in Figure 1.

Two enzymes, $P\mathbf{P}$ and $Q\mathbf{Q}$ , are proteins with quaternary structure that catalyse the same reaction, but they have different primary structures.

Describe what is meant by the tertiary structure of a protein.

Explain how two enzymes with different primary structures can catalyse the breakdown of the same substrate.

Scientists investigated the effect of pH ( $4.5\text{pH } 4.5$ and $8.0\text{pH } 8.0$ ) on the activity of enzymes $P\mathbf{P}$ and $Q\mathbf{Q}$ .

Figure 1 shows their results.

Figure 1: Product concentration over time at different pH values.

Describe what the scientists should place in the control tubes in this investigation.

State three conclusions you can make from the results in Figure 1.

Proteins

Question 16

Proteins

Question 16

Proteins

Question 16

Proteins Questions

Proteins

Question 16

Proteins Questions