IB Biology Topic B1.2 Proteins Questionbank (SL/HL)

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IB Biology Topic B1.2 Proteins Questionbank (SL/HL) | RevisionDojo

Paper

Level

Difficulty

Question

SLPaper 1AFoundational

Which of the following occurs during hydrolysis of a polypeptide?

Question

SLPaper 1AStandard

A linear 80-amino-acid polypeptide is hydrolysed into five peptide fragments. Which bond counts are correct?

Question 3SLPaper 1A

An enzyme was incubated for 20 minutes, then returned to pH 7 and 25 °C. Which inference is supported? Incubation pH Incubation temperature / °C Activity during final minute / % Activity after return / % 725100100225189478081228025 \dots

Incubation pH	Incubation temperature / °C	Activity during final minute / %	Activity after return / %
7	25	100	100
2	25	18	94
7	80	8	12
2	80	2	5

Question 4SLPaper 1A

A meal contains 20 g lentil protein and 10 g grain protein. Which conclusion follows? Essential amino acid Lentil / mg g⁻¹ protein Grain / mg g⁻¹ protein Minimum / mg g⁻¹ protein Lysine 702545 Methionine 153522 \dots

Essential amino acid	Lentil / mg g⁻¹ protein	Grain / mg g⁻¹ protein	Minimum / mg g⁻¹ protein
Lysine	70	25	45
Methionine	15	35	22

SLPaper 1AStandard

IB Biology Topic B1.2: Proteins Questionbank