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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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What are the internal and external regulators?
photoshop1234 [79]
Internal means its on the inside 
external means its on the outside 

so an internal regulator is when the proteins respond to events on the inside of a cell 
and an external regulator is when the proteins respond to events outside the cell
8 0
3 years ago
Read 2 more answers
Student provides an explanation for carbon dioxide fluctuations for different seasons of the year. ( 2 points)
jeka57 [31]

Carbon dioxide fluctuations occur for different seasons of the year due to the presence of plants in an area.

<h3>Why carbon dioxide fluctuations occur for different seasons of the year?</h3>

The carbon dioxide levels in the atmosphere moves up and down every year when plants use carbondioxide gas through the process of photosynthesis and respiration. Plants take up the carbondioxide gas in the spring and summer season and release it in fall and winter season. In this modern world, the level of carbon cycle is increasing because more carbon dioxide is emitted from burning fossil fuels and other human activities.

So we can conclude that carbon dioxide fluctuations occur for different seasons of the year due to the presence of plants in an area.

Learn more about season here: brainly.com/question/15734021

#SPJ1

3 0
1 year ago
Both lysozyme and penicillin disrupt the bacterial cell wall peptidoglycan, leading to cell lysis. However, their mechanisms of
Crazy boy [7]

Answer:

sucidal bags

Explanation:

sucides themselves

3 0
3 years ago
Humans have<br> chromosome pairs.<br> DONE
dmitriy555 [2]

Answer:

True

Explanation:

Humans have 23 pairs of chromosomes, for a total of 46 chromosomes.

7 0
3 years ago
How long will it take a cross country runner to cover a distance of 350 meters at a speed of 17.5 m/min?
kherson [118]

Answer:

20 minutes

Explanation:

Divide distance by speed to get time

D/S = t

350/17.5 = 20

(Just an fyi you posted this in biology)

3 0
3 years ago
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