Frequent question: When a chromosome is replicated the two identical molecules of DNA are called?

What is it called when a chromosome is replicated two identical copies?

Because each chromosome was duplicated during S phase, it now consists of two identical copies called sister chromatids that are attached at a common center point called the centromere.

When DNA is replicated the two identical strands of DNA are called?

In both cases, replication occurs so quickly because multiple polymerases can synthesize two new strands at the same time by using each unwound strand from the original DNA double helix as a template. One of these original strands is called the leading strand, whereas the other is called the lagging strand.

What is identical DNA called?

In replication, the DNA molecule is copied, and the two molecules are known as chromatids. During the later stages of cell division these chromatids separate longitudinally to become individual chromosomes. Chromatid pairs are normally genetically identical, and said to be homozygous.

What happens when DNA 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.

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Which of the following strands of DNA is are copied during DNA replication?

During DNA replication, one new strand (the leading strand) is made as a continuous piece. The other (the lagging strand) is made in small pieces. DNA replication requires other enzymes in addition to DNA polymerase, including DNA primase, DNA helicase, DNA ligase, and topoisomerase.

What is a DNA molecule?

Deoxyribonucleic acid (DNA) is a molecule that encodes an organism’s genetic blueprint. … DNA is a linear molecule composed of four types of smaller chemical molecules called nucleotide bases: adenine (A), cytosine (C), guanine (G), and thymine (T). The order of these bases is called the DNA sequence.