Biology homework help PlEaSe?

Question

Distinguish among interphase, mitosis and cyrokinesis.
(what does each accomplish)

Distinguish between the structure of a duplicated chromosome before mitosis and the chromosome produced by seperation of 2 chromatids during mitosis.

I don't understand please help!!!

Answer 1

Interphase: absence of cell replication, so the cell world be absorbing nuterients

Mitosis: Duplicates DNA to form two exact copies, ready to the cell to split into two

Cytokinesis: Is when the cell actually physically splits into the two new daughter cells

Hope that helps, I'm not sure what your teacher wants for the last part of the question.

Answer 2

The cell cycle has three main parts: interphase, mitosis, and cytokinesis. Here's what they do.
1. Interphase is the part that is the normal life of the cell. The cell grows and carries on its normal activities. Most cells spend their entire lives in interphase and never go on to divide. If they are going to divide, then the cell copies the DNA and grows a little larger in the end of interphase.
2. Mitosis is the process of dividing the copied DNA into two equal nuclei to put in the daughter cells. The DNA can't be just hacked into two piles, it has to be divided evenly so the daughter cells each have a complete set of DNA. Mitosis takes care of that in prophase, metaphase, anaphase, and telophase.
3. Cytokinesis divides the cytoplasm or the rest of the cell into two daughter cells. If cytokinesis didn't happen, then there would just be one big cell with two nuclei. Cytokinesis splits the original cell into two cells.

For your second question, a duplicated chromosome before mitosis has two sister chromatids held together at the centromere. It looks like a clothespin or a butterfly. One of the sister chromatids is the original DNA and one of them is the exact copy of the original. During mitosis these double-stranded chromosomes line up on the equator of the spindle and then are pulled apart with one sister chromatid going to each pole of the spindle. So then the chromosomes just have the one sister chromatid and are single-stranded.

Answer 3

Interphase, the longest portion of the cell cycle, is when the cell is carrying out normal activities and preparing to divide. The cell grow, the DNA is replicated, then organelles are replicated. In mitosis, the nuclear membrane breaks down, the chromosomes migrate to opposite poles of the cell, and the nuclear membranes reform. Cytokinesis finishes the process as the cytoplasm separated and two new identical cells are now complete.
Google mitosis animation and watch a few clips of the process in action