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During prophase, the nucleus disappears, spindle fibers form, and DNA condenses into chromosomes ( sister chromatids ). During metaphase, the sister chromatids align along the equator of the cell by attaching their centromeres to the spindle fibers.
- What are the duplicated strands of DNA called in prophase?
- What is the replicated strand of DNA called?
- Is DNA replicated during prophase?
- Which prophase stage does DNA replication occur?
- Which are replicated during interphase?
- What is a circular strand of DNA?
- How do you replicate a strand of DNA?
- What happens during copying of DNA?
- What happens when a DNA molecule is replicated?
- What is the S phase called?
- Which of the following occurs during replication?
- Which of the following builds new strands of DNA?
- What happens during prophase?
- Does DNA replication occur during telophase?
- What is an organized strand of chromatin called?
What are the duplicated strands of DNA called in prophase?
During prophase, when cell chromosomes become visible, what are the duplicated strands of DNA called? What is the name for the area in which these duplicated strands are joined? Duplicated strands of chromosomal DNA are called chromatids, or sister chromatids, and they are joined by a centromere.
What is the replicated strand of DNA called?
One strand is synthesized continuously in the direction of the replication fork; this is called the leading strand. The other strand is synthesized in a direction away from the replication fork, in short stretches of DNA known as Okazaki fragments. This strand is known as the lagging strand.
Is DNA replicated during prophase?
A common misconception is that DNA copies itself during prophase, but this is not true. In prophase, the DNA has already been copied while the cell was in interphase. The chromosome number is the same in the daughter cells as it was in the parent cell.
Which prophase stage does DNA replication occur?
The division cycle of most eukaryotic cells is divided into four discrete phases: M, G1, S, and G2. M phase (mitosis) is usually followed by cytokinesis. S phase is the period during which DNA replication occurs.
Which are replicated during interphase?
During interphase, the cell grows and DNA is replicated. During the mitotic phase, the replicated DNA and cytoplasmic contents are separated, and the cell divides.
What is a circular strand of DNA?
Circular DNA is DNA that forms a closed loop and has no ends. Examples include: Plasmids, mobile genetic elements. cccDNA, formed by some viruses inside cell nuclei.
How do you replicate a strand of DNA?
DNA replication occurs through the help of several enzymes. These enzymes "unzip" DNA molecules by breaking the hydrogen bonds that hold the two strands together. Each strand then serves as a template for a new complementary strand to be created. Complementary bases attach to one another (A-T and C-G).
What happens during copying of DNA?
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.
What happens when a DNA molecule is replicated?
DNA replication is the process by which a double-stranded DNA molecule is copied to produce two identical DNA molecules. ... Once the DNA in a cell is replicated, the cell can divide into two cells, each of which has an identical copy of the original DNA.
What is the S phase called?
S phase, or synthesis, is the phase of the cell cycle when DNA packaged into chromosomes is replicated. This event is an essential aspect of the cell cycle because replication allows for each cell created by cell division to have the same genetic make-up.
Which of the following occurs during replication?
What happens during replication? During replication, the DNA molecule separates into two strands and then produces two new complementary strands following the rules of base pairing. Each strand of the double helix of DNA serves as a template, or model, for the new strand.
Which of the following builds new strands of DNA?
DNA polymerase builds a new strand by adding DNA nucleotides one at a time.
What happens during prophase?
During prophase, the complex of DNA and proteins contained in the nucleus, known as chromatin, condenses. The chromatin coils and becomes increasingly compact, resulting in the formation of visible chromosomes. ... The sister chromatids are pairs of identical copies of DNA joined at a point called the centromere.
Does DNA replication occur during telophase?
During the G1 phase the cell grows and also carries out normal cellular functions. In the synthesis (S) phase the DNA is replicated, resulting in two copies of each of the chromosomes. ... During the last phase of mitosis, telophase, the two sets of chromosomes reach the opposite poles of the cell.
What is an organized strand of chromatin called?
Chromosomes are made up of a DNA-protein complex called chromatin that is organized into subunits called nucleosomes.
