In Pickles, jams and jellies, the invaded bacteria die due to

Options

A. Endosmosis
B. Lack of aeration
C. Deplasmolysis
D. Plasmolysis

Answer

**Step-by-Step Solution:**

1. **Understanding the Context**: The question refers to the preservation of food items like pickles, jams, and jellies, where bacteria are present.

2. **Identifying the Key Factors**: These food items typically contain high concentrations of sugar or salt.

3. **Defining Hypertonic Solutions**: A solution with a higher concentration of solutes (like sugar or salt) compared to the inside of a bacterial cell is termed hypertonic.

4. **Explaining Plasmolysis**: When bacteria are placed in a hypertonic solution, water moves out of the bacterial cells to balance the concentration of solutes. This process is called plasmolysis.

5. **Describing the Effects of Plasmolysis**: During plasmolysis, the protoplasm (the living part of the cell) shrinks and pulls away from the cell wall due to loss of water.

6. **Concluding the Outcome**: As a result of plasmolysis, the bacterial cells become dehydrated, leading to their death.

7. **Final Answer**: Therefore, in pickles, jams, and jellies, the invaded bacteria die due to the process of plasmolysis caused by the hypertonic environment created by high sugar or salt concentrations.

---