Does DNA replicate in mitosis?
no DNA replicates before mitosis. It replicates in the S phase of inter phase
The DNA replicates before mitoses begins DNA replication occurs in the S phase of interphase (before mitosis)
In a cell, DNA replication must happen before cell division can occur. DNA synthesis begins at specific locations in the genome, called "origins", where the two strands of DNA are separated. RNA primers attach to single stranded DNA and DNA polymerase extends from the primers to form new strands of …DNA, adding nucleotides matched to the template strand. The unwinding of DNA and synthesis of new strands forms a replication fork. In addition to DNA polymerase, a number of enzymes are associated with the fork and assist in the initiation and continuation of DNA synthesis by joieman04 (MORE)
Replication of DNA
In both mitosis and meiosis DNA replication only occurs once, during Interphase and Interphase 1, for mitosis and meiosis, respectively.
\n \n\n \n\n \nunwinding: the old stands that make up the parent molecule are unwound or unzipped. a special enzyme called helicase unwinds the molecule.complementary base pairing:new complimentary nucleotides(A to T, and C to G) are positioned by base pairing. joining:the complimentary nucleotides …join to form new strands. each daughter strand contains one old strand and one new strand. (MORE)
The first step in DNA replication is the binding of DNA helicase, which unwinds the double helix of DNA. Single-stranded binding proteins attach to the separated strands to hold them apart. DNA gyrase, a type of topoisomerase, binds further down the strands. Gyrase breaks, twists, and rejoins the DN…A strands to relieve the strain placed upon them by the unwinding of the helicase. Replication always occurs 5' to 3'. Because of DNA's antiparallel structure, the two strands replicate in slightly different ways. The first strand, the leading strand, extends from the 3' end where the helicase first unwound the strands, to the 5' end, where the two strands are still attached. RNA primase binds to the 3' end and lays down an RNA primer of a small number of nucleotides. Once the primer is laid, DNA polymerase III (in prokaryotes) binds to the leading strand and begins the synthesis of the new strand of DNA, proceeding along 5' to 3'. Once the strand is complete, DNA polymerase I (again, in prokaryotes) replaces the RNA primer with DNA and ligase joins the gap from where the primer was. The other strand, called the lagging strand, has an immediately apparent problem. It proceeds 5' to 3', from the origin of replication to the edge of the replication bubble - but the new strand must be synthesized from 5' to 3' as well. Therefore, the lagging strand is replicated in segments called Okazaki fragments, proceeding 5' to 3'. Each time a new fragment begins, they require an RNA primer. These primers will also be eventually replaced with DNA by DNA polymerase I and the gaps between the fragments are joined by ligase. (MORE)
DNA molecules undergo replication during interphase of the cell cycle. In this way, each newly formed cell receives a copy of the pre-existing cell's genetic information so that the new cell can synthesize the proteins necessary to maintain life functions, build and repair cell parts, and pe…rform other metabolic functions. (MORE)
DNA first unwinds by the polymerase into two strands, then polymerases run over the two strands, replace a new strand on each old strand, forming two new DNA with one new strand and one original strand in each. (The polymerase is the enzyme)
Because mitosis needs new DNA to continue If you think about the order mitoses goes throw it makes more since.
Because with mitosis, you are copying the original organism exactly. Meaning you can't take cells directly from the original without losing cells or DNA. By replicating them, they are copying the original without compromising it. It's spelled LOSE not LOOSE
In Mitosis, DNA replication begins in stage 3 after the DNA has grown, it begins to split. It then splits and replicates into two cells, where it continues to replicate.
DNA has to replicate before mitosis to keep the number of chromosomes and DNA in the cell consistent. Mitosis is the process of reproducing cells by splitting one cell in half to make two. If the DNA didn't replicate, the two daughter cells wouldn't be able to have a complete strand. DNA replicates …by dividing in half, then creating a mirror image of itself. Replication gives both strands of DNA an EXACT copy. For instance, say a cell contains 46 chromosomes (a human body cell). Before dividing in half, it has to double its amount of chromosomes. That way, each offspring cell has the same amount of chromosomes that a normal body cell has. If there weren't the same amount of chromosomes inside all of your body cells, you would have a disability. So, the amount doubles to 92 chromosomes. Then, when the cell splits, each of the offspring again have 46 chromosomes. This is because the chromosomes split equally between the two cells. If it didn't duplicate, the number of chromosomes in each cell would decrease by half each time. This would lead to some cells having a small amount of chromosomes and some cells still having 46. If this occurred, the body would not function properly. This is the same concept with DNA. *REMEMBER* Chromosomes replicate along with the DNA before mitosis begins. Hope that this helped! :D (MORE)
DNA replication occurs once during mitosis. Replication also occursonce during meiosis even though there are 2 divisions that happen.
DNA replicates as part of cell division, during which it is (obviously) replicating itself in the process known as mitosis.
\nAll cells need a copy of the DNA in order to work and function properly, and if DNA wasn't replicated, all of the cells would have to keep going back to the brain for instructions on what to do next, and the veins to the brain would clog, and the person would die.
DNA replicates itself. What happens is, with the help of enzymes, the nitrogenous bases of DNA break away from each other, then copy themselves and re-attach. This process forms 2 strands of identical DNA.
Activites within the cell cycle are monitered and controlled at specific stages, or checkpoints. Checkpoints in the life of a cell are like checkpoints during a mountain bike race. Officials monitor racers to ensure that competitors have enough water and food and that no one is hurt. If an official …thinks a racer cannot compete the race because of injury, the racer will be removed from the race. Checkpoints during the cell cycle have a similar function. Special proteins at these checkpoints monitor cell activities and send this information to the nucleus. The nucleus then instructs the cell whether or not to divide. Cellsb will not divide if: - There are not enough nutrients to support cell growth. - DNA within the nucleus has not been replicated. - DNA ia damaged. Overall, it could create some uncontrolled cell division and mutations which could create huge problems. (MORE)
DNA replication is technically not part of mitosis. Mitosis is simply the splitting of the nucleus. DNA replication however is part of the interphase, which is part of the cell cycle. The DNA replication is also known as the S phase in the interphase. In this part, the DNA is replicated creating two… sets of all genetic information. (MORE)
In Mitosis - the events that prepare the Eukaryotic Cell for division and the division process itself constitute a complex cell cycle. Interphase is the 1st phase of the cycle and is made-up of 3 phases (G1, S, & G2). It is during the S-phase (the "Synthesis" Phase), that the DNA replicates, produci…ng 2 copies of each chromosome. (MORE)
DNA polymerase attaches (polymerizes) nucleotides together to make polynucleotides using a strand of DNA that has already been unzipped by DNA helicase.
DNA replication , the basis for biological inheritance, is a fundamental process occurring in all living organisms to copy their DNA. This process is "semiconservative" in that each strand of the original double-stranded DNA molecule serves as template for the reproduction of the complementary stran…d. Hence, following DNA replication, two identical DNA molecules have been produced from a single double-stranded DNA molecule. Cellular proofreading and error-checking mechanisms ensure near perfect fidelity for DNA replication.. In a cell, DNA replication begins at specific locations in the genome, called "origins" Unwinding of DNA at the origin, and synthesis of new strands, forms a replication fork. In addition to DNA polymerase, the enzyme that synthesizes the new DNA by adding nucleotides matched to the template strand, a number of other proteins are associated with the fork and assist in the initiation and continuation of DNA synthesis.. DNA replication can also be performed in vitro (outside a cell). DNA polymerases, isolated from cells, and artificial DNA primers are used to initiate DNA synthesis at known sequences in a template molecule. The polymerase chain reaction (PCR), a common laboratory technique, employs such artificial synthesis in a cyclic manner to amplify a specific target DNA fragment from a pool of DNA. (MORE)
Because without DNA, the cells will not be able to reproduce or perform any other function.
Two daughter cells that are genetically identical are formed during the process of mitosis. DNA hence needs to be replicated so that there are two copies of each chromosome for each daughter cell.
Mitosis is asexual reproduction. DNA replication occurs in the S phase of Interphase and this is necessary for the production of the two new Daughter Cells. A human skill cell has 46 chromosomes. The cell is a parent cell. After Mitosis ends, then each Daughter Cell will still have 46 chromosomes …because the DNA replicated and now those two Daughter Cells can begin to replicate as new parent cells. They are exact replications of the parent cell. (MORE)
in order for the daughter cells to carry exactly the same copy of it :)
The cell cycle consists of interphase followed by cell division (in this case mitosis). it's true that DNA replication occurs during interphase, however interphase itself has 3 phases: 1. G1(=gap1): when the cell grows and fuctions 2. S (=Synthesis) when DNA replication occurs (as synthesizing an…ew DNA copy) 3. G2 (gap2): when the cell accumulates nutrients before the division itself. (MORE)
Chromatin (DNA in loose form) is replicated in the S phase of interphase. Interphase follows prophase and is comprised of a G1 phase, S phase, and G2 phase.
mitosis this is the type of cell division which take place during growth and development of a living organism prominent in asexual living organism which does not require for cell division of gamete cells with stages and comes into relationship with DNA replication by multiple division of it's cells.… (MORE)
DNA replication mus occur before mitosis starts. Mitosis is anotherword for cell division and so there must be two copies of DNA foreach cell at the end stage.
Before the cell divition cell needs to double its genetic meterial then the DNA is replicated.;
DNA must replicate before mitosis can begin. Mitosis is anotherword for cell division and so there needs to be two copies of theDNA for the two new cells.
The new cell that forms won't have any DNA in it if it isn't replicated first.
it depends upon number of chromosomes by the way DNA can replicate many times or countless times in mitosis
Replication forks hold the two separated strands of DNA apart preventing them from assuming their double helic shape.
DNA transcription is the process of copying a DNA template onto a messenger RNA. This mRNA is then translated into an amino acid sequence (polypeptide/protein). DNA replication is the copying of DNA to make more copies of DNA.
No, mitosis is the replication of a cell. There are specific phases of mitosis which can be associated with specific stages of cell replication. During Interphase and early Prophase, the cell unwinds its DNA and begins to replicate it.
No, mitosis is the process of cell division. DNA replication is only one part of this process.
yes, it is exactly the same as the parent. the asexual reproduction makes two identical 'babies.'
DNA replication replicates the DNA. It results in two identical copies of DNA in preparation for the process of mitosis.
During DNA replication, all your chromosomes produce a duplicate copy of themselves with identical genetic information. This is so that when they divide, in the case of mitosis, each daughter cell will have the exact same genetic information as the parent cell.
Because mitosis produces 2 genetically identical cells, each cell must have an equal amount of DNA as the parent cell had. Because of this, the DNA makes a duplicate copy of itself before mitosis begins, so that when the chromosomes separate each cell that forms will have as much DNA as the parent c…ell. (MORE)
Because mitosis must create an exact copy of the cells, the DNA is duplicated. For meiosis, the resulting diploid zygote (offspring of two gametes) contains 46 chromosomes before becoming haploid (23 chromosomes.) When it splits, this enables the zygote to have the proper chromosomes.
DNA replication does occurs in the S-phase of interphase (synthesis). This is before mitosis, where meiosis takes place in which the DNA is replicated once.
Each daughter cell must have a copy of the full cellular genetic material or there would be no reason for mitosis. Once the cell gives rise to two daughter cell it is too late to replicate the genetic material then.
No - DNA replication occurs before prophase, during S phase. This is between the G1 and G2 phases (the middle of interphase). Prophase is when DNA condenses and chromosomes become visible.
because the DNA cannot leave the nucleaus. so it creates a duplicate of the DNA so the process of mitosis can carry out
There is no DNA of mitosis. Before mitosis, the DNA must be replicated, which occurs during interphase of the cell cycle.
DNA replication actually precedes mitosis and occurs during the S phase of interphase. The DNA is duplicated but the two copies (sister chromatids) are still attached at one point called a centromere. At this point it resembles the familiar X shaped of the chromosome. During metaphase of mitosis tho…se chromosomes are lined up at the metaphase plate. The spindle fibers attach to the centrosome pulling the sister chromatids to opposite end of the cell (anaphase). When the cell starts to pinch off, each new cell will then have a complete copy of the DNA. (MORE)
During which stage is DNA replication evaluated to see if the cell is ready to move on with mitosis?
The cell cycle is controlled by three internal checkpoints thatevaluate the cell to the next stage in the cycle can be halteduntil conditions are favorable.
DNA replication begins with the "unzipping" of the parent moleculeas the hydrogen bonds between the base pairs are broken.