1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
katrin [286]
3 years ago
8

Matthew Meselson and Franklin Stahl demonstrated that DNA replication is semiconservative in bacteria.Choose the correct descrip

tion of their experiment.A. Meselson and Stahl initially cultured E. coli in medium containing only 15N until all cells contained only 15N/15N DNA. They then cultured the 15N/15N E. coli in normal medium (14N) and collected samples after one, two, and three rounds of DNA replication.B. Meselson and Stahl initially cultured E. coli in medium containing both 14N and 15N until all cells contained only 14N/15N DNA. They then cultured the 14N/15N E. coli in normal medium (14N) and collected samples after one, two, and three rounds of DNA replication.C. Meselson and Stahl initially cultured E. coli in medium containing both 14N and 15N until all cells contained only 14N/15N DNA. They then cultured the 14N/15N E. coli in medium containing only heavy nitrogen (15N) and collected samples after one, two, and three rounds of DNA replication.D. Meselson and Stahl initially cultured E. coli in medium containing only 15N until all cells contained only 15N/15N DNA. They then cultured the 15N/15N E. coli in medium containing both 14N and 15N and collected samples after one, two, and three rounds of DNA replication.
Biology
1 answer:
Makovka662 [10]3 years ago
8 0

Answer:

Option-A

Explanation:

Meselson and Stahl are known for their experiment which proved that DNA replicates by semiconservative mode of replication.

They selected the E.coli bacteria and grew them in the heavy isotope of Nitrogen that is N¹⁵ and later into the N¹⁴ isotope. Since nitrogen is the constituent of the DNA, therefore, is incorporated into the DNA.

They used the CsCl density centrifugation technique and observed the bands according to the density of nitrogen and reached the conclusion after the third generation that DNA replicates by semiconservative mode.

Thus, Option-A is correct.

You might be interested in
tropical rain forest tend to have soils that are nutrient poor, and most of the nutrient are found in the top few inches of the
Sliva [168]

Answer:

They either get their source of nutrients from something else. Or, they could also have shorter roots so that they only reach the top of the soil. They probably won't need as much nutrients to survive either.

Explanation:

5 0
3 years ago
Read 2 more answers
How do organisms inherit traits
Genrish500 [490]

Traits are inherited trough the parents genes that are passed to the offspring trough both parents reproductive cells, that contain genes in their nucleus.

Hope it helped,

Happy homework/ study/ exam!

8 0
3 years ago
Read 2 more answers
Juan is making a chart to organize his notes about centipedes.
maria [59]

Answer:

inject poison

Explanation:

edge2021

8 0
3 years ago
If a cell with six chromosomes undergoes mitosis, it will produce____________ (number) daughter cells that contain _____________
Leni [432]

Answer:

hii dear your answer is here

2 daughter cells with 6 chromosomes each.

Explanation:

If a cell with six chromosomes undergoes mitosis, it will produce 2 (number) daughter cells that contain 6 (number) chromosomes.

7 0
3 years ago
What equals to 12 g into mg and 12 grams into ng? <br><br> Same for the second question?
lions [1.4K]
I think that 12g are 1200mg and 12g are 12000000
5 0
3 years ago
Other questions:
  • How does the surface area of a mitochondrion or chloroplasts affect its energy output?
    8·2 answers
  • Which of the following statements is true about a current carrying wire in a magnetic field
    8·2 answers
  • what is a gamete A. a diploid cell that split during meiosis B.the number of chromosomes in a cell C. a haploid cell produced by
    9·1 answer
  • What are ways we can preserve renewable energy and non-renewable energy.
    5·1 answer
  • What do scientists use to describe the climate of an area?
    7·1 answer
  • The part of Earth that supports life is a(n) ____.
    15·2 answers
  • )) If deer are not hunted legally every season, a potential result is(1 point)
    14·1 answer
  • When looking through the spectrascope, the sunlight looks like ?
    12·1 answer
  • Which of the following plants bear flowers? acadia,moss,fern,liverwort​
    11·1 answer
  • Show you work here using the data table 1 to calculate the energy consumed by this female sea otter.
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!