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valkas [14]
3 years ago
14

In the beginning of prophase the DNA coils back up and​

Biology
2 answers:
Nataly [62]3 years ago
8 0

Answer:

Explanation:

When prophase is complete, the cell enters prometaphase — the second stage of mitosis. During prometaphase, phosphorylation of nuclear lamins by M-CDK causes the nuclear membrane to break down into numerous small vesicles. As a result, the spindle microtubules now have direct access to the genetic material of the cell.

Each microtubule is highly dynamic, growing outward from the centrosome and collapsing backward as it tries to locate a chromosome. Eventually, the microtubules find their targets and connect to each chromosome at its kinetochore, a complex of proteins positioned at the centromere. The actual number of microtubules that attach to a kinetochore varies between species, but at least one microtubule from each pole attaches to the kinetochore of each chromosome. A tug-of-war then ensues as the chromosomes move back and forth toward the two poles.

Oksi-84 [34.3K]3 years ago
5 0

Answer:

Cells duplicate and condense their DNA prior to entering mitosis. ... Early microscopists were the first to observe these structures, and they also noted the ... forms of chromosomes leading up to and during cytokinesis, the ultimate division of one ... condensin forms rings that coil the chromosomes into highly compact forms.

Explanation:

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If you answer correctly i will award brainliest
earnstyle [38]
Second option/ the gametes produced by meiosis allow for closing organisms
5 0
3 years ago
Read 2 more answers
The endomembrane system includes ________. ribosomes, lysosomes, vacuoles, and the endoplasmic reticulum Golgi apparatus, nucleo
bearhunter [10]

Answer:

The endomembrane system includes Golgi apparatus, lysosomes, ribosomes, and the endoplasmic reticulum.

Explanation:

The endomembrane system has some very important function, but mostly it's on a charge of the internal transportation of "things" inside the cell. The system not only transports proteins or RNA or lipids, but it also transports what the cell no longer needs (waste). It starts with the endoplasmic reticulum close to the nucleus, where ribosomes are attached, so it receives molecules from inside the nucleus and also as proteins are synthesized in the ribosomes, therefore it also transports them to the next step which is the Golgi apparatus. The Golgi wraps molecules in a lipid layer and then they are taken to their final destination. Finally, lysosomes process big molecules and take them to a place in the endomembrane system so it can be treated as said before.

4 0
3 years ago
Which of the following is a molecule?<br> A. Argon<br> B. Water<br> C. Nitrogen<br> D. Uranium
san4es73 [151]

Answer:

Argon- a chemical element

Water- polar molecule

Nitrogen- chemical compound

Uranium- chemical element

Hope this helps! :)

Please give brainliest

:)

Explanation:

In conclusion B. water is a molecule

3 0
3 years ago
Choose the magma type which is most viscous: <br> basaltic <br> andesitic<br> rhyolitic
Leviafan [203]
The third option "Rhyolitic" would be your answer.
6 0
4 years ago
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Which molecule could he make that consist of long chains of red and black colored balls
inysia [295]

Answer:

The red balls here refers to the hydrogen and black balls refers to carbon.

4 0
4 years ago
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