To what extent does the starch breakdown rate by 1% amylase solution differ between gluten-containing (wheat, rye, spelt) and gluten-free (white corn, rice, chickpea) flour samples?SL
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B
Official IB Result
IB Grade: B
Criteria A: Focus and Method
4/6
0
3
6
Criteria StrandsPro
A.1Topic communication and explanation
Good
A.2Research question formulation and focus
Moderate
A.3Methodology appropriateness and completeness
Moderate
Criteria Feedback
- The student communicates a recognisable and relevant investigation topic with clear scientific context.
- The student's research question is stated explicitly and gives the investigation a workable scope.
- The student includes a detailed procedure with repeated trials, controlled variables, and measurement details that make the method largely replicable.
- The investigation focus shifts between gluten and starch, which weakens conceptual clarity.
- Some key variables are not tightly controlled or measured, especially temperature, pH, and the homogeneity of flour suspensions.
- The sampling rationale is based more on availability than on a strong scientific justification.
Criteria B: Knowledge and Understanding
4/6
0
3
6
Criteria StrandsPro
B.1Application of source material
Moderate
B.2Use of terminology and concepts
Moderate
Criteria Feedback
- The student uses a relevant range of biological terminology, including enzyme action, absorbance, hydrolysis, and starch chemistry.
- The student draws on source material to build background context and connect it to the investigation.
- The student generally shows an understanding of how the colorimeter relates to the iodine-starch assay.
- Several important biological explanations are inaccurate or imprecise, especially around enzyme action and the relationship between gluten and starch.
- Some sources are used too loosely to support claims that go beyond what the evidence can show.
- The student's application of scientific language is weakened when they infer composition from flour type without direct measurement.
Criteria C: Critical Thinking
8/12
0
6
12
Criteria StrandsPro
C.1Research analysis
Poor
C.2Discussion and evaluation
Poor
C.3Argument development
Poor
Criteria Feedback
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- Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.
- Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur.
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Criteria D: Presentation
3/4
0
2
4
Criteria StrandsPro
D.1Structure appropriateness
Excellent
D.2Layout and formatting
Good
Criteria Feedback
- Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
- Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.
- Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur.
- Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.