Molecular Basis of Inheritance
DNA as the Genetic Material
DNA wo molecule hai jo inherited information rakhta hai. Do classic experiments ne prove kiya ki traits DNA se paas hoti hain, protein se nahi.
Kuch samay tak scientists sure nahi the ki genes DNA ke bane hain ya protein ke. Dono cell me the. Jawab un experiments se aaya jinhone dono ko alag kiya aur poochha ki asal me instructions kaun rakhta hai.
Avery, MacLeod aur McCarty ke experiment ne dikhaya ki sirf purified DNA harmless bacteria ko harmful bana sakta hai. Hershey aur Chase ke experiment me viruses use hue: sirf DNA bacteria me gaya, protein coat bahar reh gaya. Dono ka ek hi jawab tha, DNA.
Yahaan students galti karte hain
Students aksar isse zyada kheench lete hain aur sochte hain DNA hi ekmatra genetic material ho sakta hai. Bahut se viruses me RNA genes rakhta hai. Experiments ne prove kiya ki in organisms me DNA genetic material hai, ye nahi ki RNA kabhi ye kaam kar hi nahi sakta.
Yaad rakho
DNA genes rakhta hai. Kuch viruses me RNA yahi kaam karta hai.
Exam me kaise kaam aata hai: yaad rakho kaunsa experiment kya prove karta hai. Hershey-Chase ne radioactive labels use kiye, DNA ke liye 32P aur protein ke liye 35S, aur yahi sabse zyada conclusive proof ke roop me poochha jaata hai.
Ye kahaan jud'ta hai
Jab ye maan lo ki message DNA me hai, to agla sawaal khud ban jaata hai: har cell division par ek message poori tarah do me kaise copy hota hai? Yahi copying poore replication ka topic hai.
Ek quick check
DNA genetic material hai, iska conclusive proof kahaan se aaya?
- AGriffith ke transformation experiment se
- BHershey aur Chase ke experiment se
- CMendel ke pea crosses se
- DWatson aur Crick ke model se