Question:
Bioassay is based on
Bioassay is based on
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The word "bioassay" itself gives a strong hint: "bio" means living, and "assay" means to measure or estimate. The question asks what a bioassay actually relies on to estimate a drug's strength.
Updated On: Jun 24, 2026
- Chemical structure
- Biological response
- Molecular weight
- Spectral absorption
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The Correct Option is B
Solution and Explanation
Concept:
The word "bioassay" itself gives a strong hint: "bio" means living, and "assay" means to measure or estimate. The question asks what a bioassay actually relies on to estimate a drug's strength.
Step 1: A bioassay (biological assay) estimates the strength or potency of a drug or substance by observing its effect on a living system — this could be a whole animal, an isolated tissue, an organ, or microorganisms.
Step 2: The measurement is based on the biological response produced, such as a change in blood pressure, muscle contraction, or growth of bacteria. The size of this response is compared with that of a known standard to work out the potency of the test sample.
Step 3: Bioassays are especially useful for substances that are hard to measure by ordinary chemical means. They do not rely on chemical structure, molecular weight or spectral absorption, which are physico-chemical properties used in other types of analysis.
Answer: Option (2) — Biological response.
The word "bioassay" itself gives a strong hint: "bio" means living, and "assay" means to measure or estimate. The question asks what a bioassay actually relies on to estimate a drug's strength.
Step 1: A bioassay (biological assay) estimates the strength or potency of a drug or substance by observing its effect on a living system — this could be a whole animal, an isolated tissue, an organ, or microorganisms.
Step 2: The measurement is based on the biological response produced, such as a change in blood pressure, muscle contraction, or growth of bacteria. The size of this response is compared with that of a known standard to work out the potency of the test sample.
Step 3: Bioassays are especially useful for substances that are hard to measure by ordinary chemical means. They do not rely on chemical structure, molecular weight or spectral absorption, which are physico-chemical properties used in other types of analysis.
Answer: Option (2) — Biological response.
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