Table of Contents
What happens to the structure of DNA during mitosis?
During mitosis, a eukaryotic cell undergoes a carefully coordinated nuclear division that results in the formation of two genetically identical daughter cells. Then, at a critical point during interphase (called the S phase), the cell duplicates its chromosomes and ensures its systems are ready for cell division.
How does the structure of the nucleus relate to its function?
The cell nucleus is a membrane-bound structure that contains the cell’s hereditary information and controls the cell’s growth and reproduction. As the nucleus regulates the integrity of genes and gene expression, it is also referred to as the control center of a cell.
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.
How does the nucleus dictate the structure and function of the cell?
The Nucleus The nucleus is the control center of the cell. The nucleus of living cells contains the genetic material that determines the entire structure and function of that cell. The nucleus sends “commands” to the cell via molecular messengers that translate the information from DNA.
What is the structure and function of 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.
How does DNA fit into a cell?
DNA is tightly packed up to fit in the nucleus of every cell. As shown in the animation, a DNA molecule wraps around histone proteins to form tight loops called nucleosomes. These nucleosomes coil and stack together to form fibers called chromatin.
What is unique about the DNA of eukaryotes?
Eukaryotes contain organelles surrounded by a membrane like a nucleus and mitochondria. They also have ribosomes, cytoplasm, cell membrane, cell walls, and cilia/flagella. What is unique about the DNA of eukaryotes? The DNA of eukaryotes is surrounded by a nucleus and is a double helix or twisted ladder.