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
Len [333]
4 years ago
8

In planet Aggieus DNA replication is known to be conservative. Researchers kept replicating alien bacteria in media supplied wit

h 15N and then isolated a single bacteria and placed it into 14N containing media.
After three divisions how many bacterial cells would contain 15N DNA?
Biology
1 answer:
Scilla [17]4 years ago
4 0

Answer:

1 bacterial cell would contain 15N DNA

Explanation:

According to conservative model of DNA replication, the two DNA strands do not separate from each other and direct the synthesis of entirely new DNA molecule.

Here, a single bacteria had 15N DNA strands and then it was placed in N14 media. All the subsequent divisions would utilize 14N.

After one division: One 15N DNA and one 14N DNA

After two divisions : One 15N DNA and three 14N DNA

After three divisions: One 15N DNA and seven 14N DNA

Hence only one bacterial cell will contain 15N DNA  

You might be interested in
1) The density of a substance is the ratio of its mass to its volume. The formula for density is: D = mass/volume. If the densit
Agata [3.3K]
Yes d =the mass value and
6 0
3 years ago
How does gel electrophoresis relate to dna fingerprinting?
yanalaym [24]
Gel electrophoresis<span> is basically the process by which we take the </span>DNA<span>, and run an electric charge through it. The </span>DNA<span>, being negatively charged by default, will move towards the positive side.</span>
5 0
3 years ago
2. Name 2 parasitic flatworms.
Tju [1.3M]

Explanation:

Both flukes and tapeworms are parasites with vertebrate hosts, including human hosts. Flukes live in the host's circulatory system or liver. Tapeworms live in the host's digestive system.

7 0
3 years ago
Read 2 more answers
Biologists notice that a population of ferrets introduced into a reserve begins to show exponential growth. The figures represen
sesenic [268]

Answer:

A. 50, 88, 145, 227

Explanation:

The correct option would be option A.

<u>When something grows exponentially, it means the growth increased at a high rate. More specifically, each rate of increase results in more or less doubling of the preceding rate. For example, if the current value of growth rate is 2 for a substance that is growing exponentially, the next growth rates will be 4, 8, 16, etc.</u>

<em>In this particular illustration, the only option that best fit into an exponential system is option A in which the growth rate more or less doubles each time from 50 to 88, from 88 to 145, and then from 145 to 227.</em>

8 0
3 years ago
Which of the following methods results in active acquired immunity?
tatyana61 [14]
The answer is Vaccination. 
Acquired or adaptive immunity is the body's third line of defense. This is protection against specific types of pathogens. Acquired immunity may be either natural or artificial in nature. Both natural and artificial immunity have passive and active components. Active immunity results from an infection or an immunization, while passive immunity comes from naturally or artificially gaining antibodies.
4 0
3 years ago
Other questions:
  • A common symptom of pharyngitis is swelling of the anterior cervical lymph nodes. why might lymph nodes swell in the presence of
    13·1 answer
  • A frog lays thousands of eggs because many eggs die. This behavior is an example of
    14·1 answer
  • Describe at least two ways in which some factories pollute the environment.
    8·2 answers
  • Two scientists observe sparrows singing in the wild. Based on the investigation, scientist A says that the sorrows sing to keep
    8·1 answer
  • when consuelo struck a tuning fork and held it close to a string on a guitar the string began to vibrate on its own and make a s
    15·1 answer
  • Regulation of isoleucine synthesis is an example of feedback inhibition of an anabolic pathway. With that in mind, explain how A
    6·1 answer
  • A nurse is ambulating a patient who has had a stroke. the patient has paresis on the right side of the upper body. where would t
    12·2 answers
  • Some bacteria live in the roots of plants like soybeans and
    6·2 answers
  • The circulatory system is composed of the blood, blood vessels and the heart.
    9·2 answers
  • A new phenotype of mouse has been discovered – short-tails. You have been given a short-tailed mouse and do not know anything ab
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!