Topics:
Animal Physiology, Animal Refresher
Match: Cell Organelles and Cell Division Stages
Match the column:
| TABLE-I | TABLE-II |
|---|---|
| 1) Lysosome | a) Reductional division |
| 2) Ribosome | b) Crossing over |
| 3) Golgi bodies | c) Equational division |
| 4) Meiosis-I | d) Suicide bag |
| 5) Meiosis-II | e) Protein factory |
| 6) Pachytene | f) Transport and packaging of proteins |
- 1-d, 2-e, 3-f, 4-a, 5-c, 6-b — Correct Answer
- 1-d, 2-e, 3-f, 4-c, 5-a, 6-b
- 1-d, 2-f, 3-e, 4-a, 5-c, 6-b
- 1-e, 2-d, 3-f, 4-a, 5-c, 6-b
Explanation:
Correct Answer: 1-d, 2-e, 3-f, 4-a, 5-c, 6-b
Explanation of Each Match
- 1-d) Lysosome → Suicide bag: Lysosomes contain digestive enzymes (acid hydrolases). They are called 'suicide bags' because if they rupture, their enzymes digest the cell itself (autolysis). Named by Christian de Duve.
- 2-e) Ribosome → Protein factory: Ribosomes are the sites of protein synthesis (translation). Free ribosomes synthesize cytoplasmic proteins; those on rough ER synthesize secretory proteins. Called the 'protein factory' of the cell.
- 3-f) Golgi bodies → Transport and packaging of proteins: The Golgi apparatus (Golgi complex) receives proteins from the ER, modifies them (glycosylation, phosphorylation), packages them into vesicles, and routes them to their destinations (secretion, lysosomes, plasma membrane).
- 4-a) Meiosis-I → Reductional division: Meiosis-I is called the reductional division because homologous chromosomes separate, reducing the chromosome number from diploid (2n) to haploid (n).
- 5-c) Meiosis-II → Equational division: Meiosis-II resembles mitosis — sister chromatids separate without further change in chromosome number. The cell remains haploid (n → n), so it is 'equational.'
- 6-b) Pachytene → Crossing over: Pachytene is the substage of Prophase-I of meiosis where crossing over (chiasmata formation) occurs between non-sister chromatids of homologous chromosomes, generating genetic recombination.
