LABORATORY REVIEW
MOLECULAR BIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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DNA that segregates during mitosis
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DNA that segregates during mitosis 2
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DNA that segregates either in mitosis or meiosis 1
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DNA that segregates during meiosis 2
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Detailed explanation-1: -So during a mitotic cell cycle, the DNA content per chromosome doubles during S phase (each chromosome starts as one chromatid, then becomes a pair of identical sister chromatids during S phase), but the chromosome number stays the same. A chromatid, then, is a single chromosomal DNA molecule.
Detailed explanation-2: -Definition. Following DNA replication, as part of cell division, each chromosome consists of two full length DNA molecules joined at the centromere. These two DNA molecules are sister chromatids.
Detailed explanation-3: -Explanation: DNA replication involves the separation of the two original DNA strands. Both of these strands are then replicated using DNA polymerase. This results in two DNA double helices, each with a new strand and an original strand.
Detailed explanation-4: -In general, DNA is replicated by uncoiling of the helix, strand separation by breaking of the hydrogen bonds between the complementary strands, and synthesis of two new strands by complementary base pairing.