Biology IA Exemplar: How do different NESCORÉ® instant coffee… | RevisionDojo

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IB Biology HL Internal Assessment Example

How do different NESCORÉ® instant coffee (coffea arabica) concentrations (0.000%, 0.375%, 0.750%, 1.125%, 1.500%) affect the hydrolysis rate of chicken (gallus gallus domesticus) albumin protein by trypsin at 37°C, measured by absorbance changes per minute using the Biuret test, which indicates protein content in solution through color change?HL

Official IB Result

IB Grade: 6

Criteria A: Research Design

5/6

Criteria StrandsPro

A.1Research question context

Excellent

A.2Methodological considerations

Good

A.3Methodology description

Good

Criteria Feedback

The student sets up a focused, testable investigation with a clear biological context and defined variables.
The student's procedure includes enough operational detail for another reader to follow the basic method.
The student shows awareness of key controls such as temperature, pH, quantities, and repeat trials.

The investigation does not fully control the coffee’s own absorbance, which weakens the ability to isolate the effect being tested.
The sequence of adding the assay reagent before incubation creates a major validity problem for the enzyme reaction.
A few methodological details still need tightening, such as how mixing, sampling, and temperature were maintained during measurement.

Criteria B: Data Analysis

5/6

Criteria StrandsPro

B.1Communication of data recording and processing

Excellent

B.2Consideration of uncertainties

Moderate

B.3Data processing quality

Moderate

Criteria Feedback

The student's results are organized clearly in tables with units, repeats, and summary statistics.
The student includes a graph with error bars and regression analysis, which helps show the overall trend in the data.
The student makes a meaningful effort to quantify uncertainty using replicate data and spread measures.

The coffee solutions introduce baseline colour at the measurement wavelength, and that is not corrected for in the processing.
Some uncertainty labels and calculations are inconsistent or not clearly defined.
A few reported values do not fully agree with each other, which weakens confidence in the numerical processing.

Criteria C: Conclusion

4/6

Criteria StrandsPro

C.1Conclusion relevance and consistency

Moderate

C.2Scientific context comparison

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.

Criteria D: Evaluation

4/6

Criteria StrandsPro

D.1Methodological weaknesses

Good

D.2Improvements

Moderate

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.

Loading scores...

Official IB Result

IB Grade: 6

Criteria A: Research Design

5/6

Criteria StrandsPro

A.1Research question context

Excellent

A.2Methodological considerations

Good

A.3Methodology description

Good

Criteria Feedback

The student sets up a focused, testable investigation with a clear biological context and defined variables.
The student's procedure includes enough operational detail for another reader to follow the basic method.
The student shows awareness of key controls such as temperature, pH, quantities, and repeat trials.

The investigation does not fully control the coffee’s own absorbance, which weakens the ability to isolate the effect being tested.
The sequence of adding the assay reagent before incubation creates a major validity problem for the enzyme reaction.
A few methodological details still need tightening, such as how mixing, sampling, and temperature were maintained during measurement.

Criteria B: Data Analysis

5/6

Criteria StrandsPro

B.1Communication of data recording and processing

Excellent

B.2Consideration of uncertainties

Moderate

B.3Data processing quality

Moderate

Criteria Feedback

The student's results are organized clearly in tables with units, repeats, and summary statistics.
The student includes a graph with error bars and regression analysis, which helps show the overall trend in the data.
The student makes a meaningful effort to quantify uncertainty using replicate data and spread measures.

The coffee solutions introduce baseline colour at the measurement wavelength, and that is not corrected for in the processing.
Some uncertainty labels and calculations are inconsistent or not clearly defined.
A few reported values do not fully agree with each other, which weakens confidence in the numerical processing.

Criteria C: Conclusion

4/6

Criteria StrandsPro

C.1Conclusion relevance and consistency

Moderate

C.2Scientific context comparison

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.

Criteria D: Evaluation

4/6

Criteria StrandsPro

D.1Methodological weaknesses

Good

D.2Improvements

Moderate

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.