What are the proteins that DNA wraps around?
What are the proteins that DNA wraps around?
The proteins that DNA wraps around are called histones.
What is the loose combination of DNA and proteins called?
Chromatin
How is the DNA structure organized in a chromosome?
In the nucleus of each cell, the DNA molecule is packaged into thread-like structures called chromosomes. Each chromosome is made up of DNA tightly coiled many times around proteins called histones that support its structure. DNA and histone proteins are packaged into structures called chromosomes.
What is the role of DNA in a cell that is not dividing?
All known cellular life and some viruses contain DNA. The main role of DNA in the cell is the long-term storage of information. It is often compared to a blueprint, since it contains the instructions to construct other components of the cell, such as proteins and RNA molecules.
Which event most accurately describes cytokinesis quizlet?
Cytokinesis is the process wherein actual division of the cell, including the cell membrane and the cytoplasm, from the parent cell to two daughter cells. The correct answer in this question is “the metaphase plate is the beginning area for cytokinesis” as the metaphase plate dictates the midpoint of the cell.
Which is the end result of cytokinesis quizlet?
The end result of mitosis and cytokinesis is two genetically identical cells where only one cell existed before.
What results from the end of meiosis?
In contrast to a mitotic division, which yields two identical diploid daughter cells, the end result of meiosis is haploid daughter cells with chromosomal combinations different from those originally present in the parent. In sperm cells, four haploid gametes are produced.
Can mitosis occur in the absence of cytokinesis?
Mitosis Can Occur Without Cytokinesis Although nuclear division is usually followed by cytoplasmic division, there are exceptions.
In which phase of mitosis do sister chromatids separate?
anaphase
What do spindle fibers do in mitosis?
Spindle fibers form a protein structure that divides the genetic material in a cell. The spindle is necessary to equally divide the chromosomes in a parental cell into two daughter cells during both types of nuclear division: mitosis and meiosis. During mitosis, the spindle fibers are called the mitotic spindle.
What are 2 reasons why cells undergo the process of mitosis?
The main functions of mitosis are growth and repair. Some cells once fully formed do not undergo cell division, such as nerve cells and muscle cells. Since you can never re-grow or repair these types of cells once they are mature, you must take care of the ones you have.
What does 2N mean?
Humans have 46 chromosomes in each diploid cell. Among those, there are two sex-determining chromosomes, and 22 pairs of autosomal, or non-sex, chromosomes. The total number of chromosomes in diploid cells is described as 2n, which is twice the number of chromosomes in a haploid cell (n).
What products are made in mitosis?
Mitosis is used to produce daughter cells that are genetically identical to the parent cells. The cell copies – or ‘replicates’ – its chromosomes, and then splits the copied chromosomes equally to make sure that each daughter cell has a full set.
What is the end product of mitosis quizlet?
What is the end product of Mitosis? Two identical daughter cells.