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just olya [345]
3 years ago
6

DNA wrapped around histone proteins forms a material called ____ which condenses tightly to form _____ that can be seen with a l

ight microscope, which duplicate during the S phase of the cell cycle to form identical _____ _____, which are bound together by a region called the ______, and which finally separate during the M phase of the cell cycle.
Biology
1 answer:
makkiz [27]3 years ago
5 0

Answer:

The correct answer will be-

1. Nucleosomes

2. Chromatin

3. Sister chroamtid

4. Centromere

Explanation:

The DNA is a very long molecule which if has to be passed on to the daughter cell as it is will cause problems. So, to reduce problems a cell form tightly packed structure of DNA so that they can be passed easily to the daughter cell.

The packaging of DNA begins with the wrapping of the DNA around histone proteins which forms the 11 nm basic structural units called nucleosomes. The nucleosomes start condensing each other and form 30 nm structure chromatin fibres.

The chromatin fibres undergo replication during S phase which produces an exact copy of the chromatin called sister chromatids bound to each other at a central point called centromere which helps the separation of the chromatids during M phase.

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