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
SVETLANKA909090 [29]
3 years ago
15

E. coli cells grown on 15N medium are transferred to 14N medium and allowed to grow for two more generations (two rounds of DNA

replication). DNA extracted from these cells is centrifuged. What density distribution of DNA would you expect in this experiment?
a. one high-density and one low-density band
b. one intermediate-density band
c. one high-density and one intermediate-density band
d. one low-density and one intermediate-density band
Biology
1 answer:
White raven [17]3 years ago
8 0

Answer:

Option (d).

Explanation:

DNA is the genetic material of all the organism except some viruses. DNA is composed of nitrogenous base, deoxyribose pentose sugar and the phosphate group.

DNA replicatese by semi-conservative mode of replication in which one the daughter DNA consists of one newly synthesized strand and one parental strand. This mode of replication was explained by Messelson and Sthal experiment. The cells from 15N medium are transferred to 14N medium the band of intermediate density was observed. The daughter DNA consists of one 15N DNA strand and one 14N DNA strnd. This strand undergo replication in the 14N medium. This time one low density DNA band ( contains 14N - 14N DNA strand) and one intermediate density band ( 14N-15N DNA).

Thus, the correct answer is option (d).

You might be interested in
As an infant, the ability to produce antibodies is
fiasKO [112]
A baby's immune system is not fully developed until he/she is about six months-old. In the meantime, pregnant mothers pass immunoglobulin antibodies from their bloodstream, through the placenta, and to the fetus. These antibodies are an essential part of the fetus's immune system. They identify and bind to harmful substances, such as bacteria, viruses, and fungi that enter the body. This triggers other immune cells to destroy the foreign substance.
4 0
3 years ago
Read 2 more answers
What is the natural pH of the ocean? below 7 above 7 exactly 7 different depending on the location
Semmy [17]
I'll say it's above 7
7 0
3 years ago
Read 2 more answers
How does monitoring environmental parameters affect policies regarding resource use?
sergiy2304 [10]
Environmental parameters indicate whether or not resource use is harming the environment and this way monitoring environmental parameters affect policies regarding resource use. The correct option among all the options that are given in the question is the last option or option "d". By watching these indicators, it is possible to preserve the natural balance.
5 0
3 years ago
Are herbivores or omnivores better adapted for ecosystems
horrorfan [7]

Answer:

I think its omnivores

Explanation:

oninvores can better adapt to developments than herbivores and carnivores. because they have a better time finding food, they are better at adapting to new environments

5 0
3 years ago
The human body can properly function only within a certain temperature range. This tendency toward maintaining a stable internal
ANTONII [103]
If that's a true or false question the answer is true
6 0
3 years ago
Other questions:
  • homeo- comes from a greek word means still the suffix stasis comes from "stoppage" or "standstill" how does this relate to homeo
    12·1 answer
  • Which statement accurately describes the relationship between the brain and addiction?
    12·1 answer
  • The actions involved in the process of digestion are
    15·1 answer
  • Chemical runoff from fields, oil spills, and erosion is the major source? A.Air pollution.
    12·2 answers
  • Tall height is dominant to short height in pea plants. You have a tall pea plant that you cross with a short pea plant. What is
    9·1 answer
  • What effect would hypotension have on the capillary hydrostatic pressure gradient and net filtration pressure?
    8·1 answer
  • Q: A: Which of these best describes what occurs during cytokinesis?
    7·1 answer
  • Enzymes are involved in DNA replication except
    11·1 answer
  • Which of the following demonstrates an organ providing a force?
    11·1 answer
  • PLEASE ANSWER ILL GIVE YOU BRAINLIEST
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!