What structures make up a chromosome?
Chromosomes are thread-like structures located inside the nucleus of animal and plant cells. Each chromosome is made of protein and a single molecule of deoxyribonucleic acid (DNA). Passed from parents to offspring, DNA contains the specific instructions that make each type of living creature unique.
What cell structures are responsible for moving the chromosomes?
Duplicated centrioles are responsible for moving chromosomes during mitosis. They are involved in the formation and organization of spindle during cell division (mitotic phase) and also in the process of cytokinesis. It is composed of nine triplets of microtubules that are the proteins of cytoskeleton.
Which of the following is responsible for chromosome movement?
Powering chromosome movement (microtubules) The most prominent structure in a mitotic cell is the bipolar spindle (made up of microtubules and associated motor proteins), which provides the force to move chromosomes and thereby bring about their segregation.
What is the structure and function of chromosomes?
Chromosomes, the thread-like structures are located inside the nucleus of all animal and plant cells. These are responsible to pass on genetic information from the parent cell to the daughter cells.
Which are the two main parts that make up a chromosome?
Chromosomes mainly constitute DNA and histone proteins. DNA is wrapped around a core of histone octamer to form a nucleosome. Nucleosomes are the repeating unit present in the chromatin.
What structures are responsible for the movement of chromosomes during mitosis?
The centromere holding the two identical strands of DNA/chromosome is responsible for the movement of chromosomes during mitosis. During the anaphase, this centromere releases the two strands separating them to two sister chromatids. These chromatids move to opposite ends of the cell.
Which structure is responsible for guiding and pulling the chromosomes during mitosis?
Centromeres are chromosomal regions that mediate kinetochore assembly and spindle attachment during cell division. Serving as the attachment points of microtubules, they are responsible for guiding the movement of chromosomes during mitosis and meiosis, assuring accurate chromosome segregation.
What structure helps separate chromosomes during mitosis?
The chromosomes are separated by a structure called the mitotic spindle. The mitotic spindle is made of many long proteins called microtubules, which are attached to a chromosome at one end and to the pole of a cell at the other end. The sister chromatids are separated simultaneously at their centromeres.
Which structure is responsible for chromosome movement during cell division quizlet?
Microtubles are responsible for the movement of chromosomes during cell division.