Match List-I with List-II.List I List II A. Alfred Hershey and Martha I. Streptococcus pneumoniae B. Euchromatin II. Densely packed and dark-stained C. Frederick Griffith III. Loosely packed and light-stained D. Heterochromatin IV. DNA as genetic material confirmation
Choose the correct answer from the options given below:
| List I | List II |
|---|---|
| A. Alfred Hershey and Martha | I. Streptococcus pneumoniae |
| B. Euchromatin | II. Densely packed and dark-stained |
| C. Frederick Griffith | III. Loosely packed and light-stained |
| D. Heterochromatin | IV. DNA as genetic material confirmation |
Answer: (A) A-IV, B-III, C-I, D-II. Answer: (A) A-IV, B-III, C-I, D-II.
- A.A-IV, B-III, C-I, D-II✓
- B.A-III, B-II, C-IV, D-I
- C.A-II, B-IV, C-I, D-III
- D.A-IV, B-II, C-I, D-III
Correct Answer
(A) A-IV, B-III, C-I, D-II
Solution & Explanation
Answer: (A) A-IV, B-III, C-I, D-II. Hershey and Chase gave unequivocal proof that DNA is the genetic material (IV); euchromatin is loosely packed and light-stained (III); Griffith worked with Streptococcus pneumoniae (I); heterochromatin is densely packed and dark-stained (II). NCERT Ch 5, p.85, lines 029-030: "The unequivocal proof that DNA is the genetic material came from the experiments of Alfred Hershey and Martha Chase"; p.84, lines 004-006: "some region of chromatin are loosely packed (and stains light) and are referred to as euchromatin. The chromatin that is more densely packed and stains dark are called as Heterochromatin"; p.84, line 019: "Frederick Griffith, in a series of experiments with Streptococcus pneumoniae".