Which features make bacteria useful in biotechnology?
▶️ Answer/Explanation
Ans: C
Bacteria are widely used in biotechnology due to several key features:
- Rapid reproduction (allows quick production of desired products)
- Simple genetic structure (easy to modify)
- Plasmids (can be engineered to carry foreign genes)
- Ability to produce human proteins (when genetically modified)
Option C correctly identifies these essential characteristics that make bacteria valuable in biotechnological applications, unlike the other options which either list irrelevant features or omit critical ones.
The diagram shows a label found on a container of biological washing powder.
Which stains does the washing powder remove?
▶️ Answer/Explanation
Ans: C
Biological washing powders contain enzymes (e.g., proteases, lipases) that break down protein-based and fat-based stains. The label indicates the powder is effective against organic stains like blood (protein) and grease (fat).
Option C matches these stain types, while others (A, B, D) include inorganic or non-enzyme-targeted stains. Thus, the correct answer is C.