Meselson and Stahl transferred few bacteria grown in N15 medium to N14 medium for replicating their DNA. What would be the result after two rounds of replication?
Correct answer: D. 50% hybrid duplex and 50% light duplex
- A. 100% heavy duplex
- B. 100% hybrid duplex
- C. 50% hybrid duplex and 50% heavy duplex
- D. 50% hybrid duplex and 50% light duplex
Explanation
After two rounds of replication, half of the duplexes will be hybrid i.e. contain one N15 strand and one N14 strand, while the other half will contain only N14 or light strands.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Chromosomes
Chromosomes are DNA-protein structures that carry genes and become visible during cell division. Coverage includes chromatin, centromeres, sister chromatids, homologous chromosomes, chromosome number, and the distinction between diploid and haploid cells, with links to DNA replication, mitosis and meiosis.
Practise Cell Structure and Function
2,478 free Cell Structure and Function MCQs from Biology, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Biology questions like this
Biology is on 8 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Chromosomes questions
Complementary DNA molecule is:
A trait determines by a gene on the X chromosome is said to be
In humans the sequence TTAGGG is repeated how many times?
If sequence in DNA is CCCTAGAG, then what would be the sequence in messenger RNA after transcription?
Which one is an example of a Nucleotide?
The nitrogen-containing bases in nucleotide are of two types; Purines and Pyrimidines. The purines bases are: