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olya-2409 [2.1K]
3 years ago
7

What is exposed to antigen (virus) hoping to trigger an immune response? (The second letter is C the fourth letter is I and the

seventh letter is I. Yes this is a crossword)
Biology
1 answer:
guapka [62]3 years ago
4 0
U can do it your self its a cross word for crying out loud
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DNA wrapped around histone proteins forms a material called ____ which condenses tightly to form _____ that can be seen with a l
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Answer:

The correct answer will be-

1. Nucleosomes

2. Chromatin

3. Sister chroamtid

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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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the Coriolis effect

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