Principles of Biomedical Technology (Principles of Biomedical Science)
Biomolecule indicator chart
Biomolecule indicator chart
Unit 1: Unit 1.1 to 1.2 Evidence & BiomoleculesPBS 1.1-1.2Biotechnology Research and Experiments
Identify Biomolecules From Indicator Data
Use indicator color changes to identify carbohydrates, proteins, and lipids in evidence samples.
Builds on (2 levels back)inferred · high confidence
- Use a reference chart: Indicators and microscope features must be compared to a known guide.
- Structure and function: Students connect visible features to what tissues or molecules do.
Prerequisites are inferred: pending teacher review.
Re-learn the skill with worked practice and clear examples.
Use indicator color changes to identify carbohydrates, proteins, and lipids in evidence samples.
Step 1: Learn the key
Match the indicator [blank] to the chart before naming the biomolecule present in the [blank].
| Indicator | Positive result | Biomolecule |
|---|---|---|
| Benedict after heat | orange | reducing sugar |
| Iodine | blue-black | starch |
| Biuret | purple | protein |
| Brown paper | translucent spot | lipid |
Step 2: Use the model
Read the figure, table, control, range, or protocol before choosing an answer.
Step 3: Name the limit
Say what the evidence can support and what it cannot prove yet.
Practice
Use the biomolecule chart. Which positive result identifies protein?
Reviewed| Indicator | Positive result | Biomolecule |
|---|---|---|
| Benedict after heat | orange | reducing sugar |
| Iodine | blue-black | starch |
| Biuret | purple | protein |
| Brown paper | translucent spot | lipid |
- A.Biuret turns purple
- B.Iodine turns blue-black
- C.Benedict turns orange
- D.Brown paper turns translucent
Show the worked solution ▾
Answer: A. Biuret turns purple
- Step 1: Find protein row: The chart links protein to Biuret.
- Step 2: Read result: Biuret positive is purple.
Why it's right: Purple Biuret indicates protein.
Why the others miss:
- B: Blue-black iodine indicates starch.
- C: Orange Benedict indicates reducing sugar.
- D: Translucent spot indicates lipid.
Aligned to Biotechnology Research and Experiments · reading level ~grade 9
Where you'd see this
- In Unit 1.1 to 1.2 Evidence & Biomolecules, this skill turns class evidence into a result another person can check.
Video library
Watch: Identify Biomolecules From Indicator Data
Food tests - Glucose test, Benedict test, Starch test, Biuret test, Sudan III test
Science A Plus Global
Guided notes
Fill these in as you work through the lesson.
Big idea: Use indicator color changes to identify carbohydrates, proteins, and lipids in evidence samples.
Key terms: write the meaning
- Indicator (chemical test that changes if target is present):
- Starch (large carbohydrate):
- Protein (macromolecule made of amino acids):
- Lipid (fat or oil molecule):
The rule
Match the indicator to the chart before naming the biomolecule present in the .
Check yourself
- Which indicator was used?
- What color did the sample turn?
- Which biomolecule matches that color?
Work one example
Iodine turns an unknown blue-black. Use the chart to identify the biomolecule.