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
iragen [17]
3 years ago
12

I’ll mark brainliest explain the sequence of events in the replication of DNA

Biology
1 answer:
salantis [7]3 years ago
5 0

Explanation:

Replication is the process by which a double-stranded DNA molecule is copied to produce two identical DNA molecules. DNA replication is one of the most basic processes that occurs within a cell. Each time a cell divides, the two resulting daughter cells must contain exactly the same genetic information, or DNA, as the parent cell. To accomplish this, each strand of existing DNA acts as a template for replication.

How is DNA replicated?:

Replication occurs in three major steps: the opening of the double helix and separation of the DNA strands, the priming of the template strand, and the assembly of the new DNA segment. During separation, the two strands of the DNA double helix uncoil at a specific location called the origin. Several enzymes and proteins then work together to prepare, or prime, the strands for duplication. Finally, a special enzyme called DNA polymerase organizes the assembly of the new DNA strands. The following description of this three-stage process applies generally to all cells, but specific variations within the process may occur depending on organism and cell type.

What triggers replication?

A schematic shows a double-stranded DNA molecule undergoing the replication process. The left side of the molecule is double-stranded. In the middle of the molecule, a globular yellow structure, representing the protein helicase, is bound to the ends of several nitrogenous bases on the lower strand. To the right of the helicase protein, the double helix has opened and the top strand has separated from the bottom. At right, a short segment of the newly replicated double-stranded DNA molecule is visible.

Helicase (yellow) unwinds the double helix.

The initiation of DNA replication occurs in two steps. First, a so-called initiator protein unwinds a short stretch of the DNA double helix. Then, a protein known as helicase attaches to and breaks apart the hydrogen bonds between the bases on the DNA strands, thereby pulling apart the two strands. As the helicase moves along the DNA molecule, it continues breaking these hydrogen bonds and separating the two polynucleotide chains.

A schematic shows a double-stranded DNA molecule undergoing the replication process. At right, the double helix has opened and the top strand has separated from the bottom. A globular yellow structure, representing the protein helicase, is bound to the ends of several nitrogenous bases on the lower strand. A red globular molecule, representing the enzyme primase, is bound to the lower DNA strand to the right of helicase.

While helicase and the initiator protein (not shown) separate the two polynucleotide chains, primase (red) assembles a primer. This primer permits the next step in the replication process.

Meanwhile, as the helicase separates the strands, another enzyme called primase briefly attaches to each strand and assembles a foundation at which replication can begin. This foundation is a short stretch of nucleotides called a prime

You might be interested in
How are the rings of the gas giants theorized to have formed
Alenkinab [10]
Dust and many other particles gathered up and formed around by a gravitational pull.
6 0
3 years ago
Can you plz answer this that will be lovely thank you (:
natta225 [31]

Answer:

helium, lithium, boron,

Explanation:

sorry these are all I can think of right now

4 0
3 years ago
What are two advantages of setting up instruments for measuring carbon dioxide on top of mauna loa​
kari74 [83]

So it's easier to understand how plants take in carbon-dioxide and how much carbon-dioxide is in the atmosphere

4 0
3 years ago
What determines the color of visible light
VikaD [51]

"Visible light is light that has wavelengths that can be detected by the human eye. The wavelength of visible light determines the color that the light appears. As you can see in the Figure below, light with the longest wavelength appears red, and light with the shortest wavelength appears violet."

3 0
3 years ago
Why does the human body maintain a constant pH of its blood
IRISSAK [1]
Because if there is a minimal variation of it the normal state of pH, it can cause severe effects in the brain, arteries, the heart, and other organs. 
In other words, it can have some serious effects on the body systems that can lead big diseases, like cancer. 
6 0
3 years ago
Other questions:
  • If water vapor continues to increase in our atmosphere, what changes would you expect in fresh water lakes?
    5·2 answers
  • Which structure transports water and nutrients from the roots of the rest of the plant
    10·2 answers
  • Which of the following conditions is most likely to result in changes in allele frequencies in a population. A. random mating. B
    9·1 answer
  • A new type of fish has been discovered. It has vibration receptors on its snout and virtually nonexistent eyes. Based on these c
    7·1 answer
  • The most effective way to reduce household waste would be to
    10·1 answer
  • A mature corn plant occurs when the plant reaches _____.<br><br> five feet<br> old age<br> adulthood
    13·1 answer
  • As you watch the introduction sequence, list three abiotie, or nonliving factors in this ecosystem.
    6·1 answer
  • Why was modern classification invented? A: traditional classification could not classify all living things. B:scientists realize
    6·2 answers
  • Ppppppppppppppppppppppppp
    11·1 answer
  • The binomial effect size display is a method for illustrating the size of:
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!