To determine the correct arrangement of biomolecules in increasing order of their molecular weight, we need to analyze each molecule provided in the question:
1. **AMP (Adenosine Monophosphate)**: This molecule consists of one phosphate group. As a result, it has the lowest molecular weight among the given options.
2. **ADP (Adenosine Diphosphate)**: This molecule contains two phosphate groups. Therefore, its molecular weight is higher than that of AMP but lower than ATP.
3. **ATP (Adenosine Triphosphate)**: This molecule has three phosphate groups, making it heavier than both AMP and ADP.
4. **DNA (Deoxyribonucleic Acid)**: DNA is a complex molecule made up of many nucleotides, each containing a sugar, a phosphate group, and a nitrogenous base. Due to its larger structure and multiple components, DNA has the highest molecular weight among the listed biomolecules.
Now, let's arrange these molecules in order of increasing molecular weight:
- **First**: AMP (lowest molecular weight)
- **Second**: ADP
- **Third**: ATP
- **Fourth**: DNA (highest molecular weight)
Thus, the correct arrangement of these biomolecules in increasing order of their molecular weight is:
**AMP < ADP < ATP < DNA**
Now, let's check the options provided in the question:
(a) ATP, ADP, AMP, DNA
(b) ADP, ATP, AMP, DNA
(c) AMP, ADP, ATP, DNA
(d) DNA, ATP, ADP, AMP
The correct answer is **(c) AMP, ADP, ATP, DNA**.
