Shinya Inoue was born in 1921, and is primarily a biophysicist (although he is currently a researcher at the Marina Biological Laboratory) and a member of the National Academy of Sciences. His research field is the visualization of dynamic processes within living cells using the light microscope. He has both a Ph. D. and an M.A. in biology from Princeton University. He also has something known as a “Rigakushi”, in zoology from the Tokyo University in 1944. Inoue is considered to be the father in the field of cytoskeleton dynamics. By using polarization microscopy in the 1940s and 1950s, he’s proven for the first time ever that the mitotic spindle is composed of aligned protein fibers (the fibers are now known as microtubules). He also went on to working even further with the spindle fibers, and discovered that artificial polymerization and deploymerization of spindle fibers can generate forces within the cell, and he proposed that chromosomes are normally moved by such forces during mitosis. In addition, during his work with the Marine Biological Laboratory (M.B.L.), he was honored by the government of Japan with the Order of the Sacred Treasure, Gold Rays with Neck Ribbon award. The mentioned award “recognizes Inoue’s contributions to science and the development of technologies, and the promotion of research cooperation between Japan and the United States”. Inoue’s greatest contribution was to pioneer the microscopic imaging of live cells by inventing new ways of using light to investigate the details of the cellular structure and dynamics. According to one article by an anonymous author, Dr. Shinya Inoue presented the 2003 International Prize for Biology on December 1 by the emperor of Japan and the Prime Minister Koizumi Junichiro. It was given to him for the promotion of science and to commemorate the 66 year reign of emperor Showa and his longtime interest in biological research. Dr. Inoue was actually chosen from 41 other scientists, whom were nominated from 14 different countries to receive this remarkable prize in the area of cell biology. Dr. Shiya…
Mitosis vs. Meiosis
The dividing of cells is an important bodily function for an organism to survive. The way our bodies work is very delicate and precise. Therefore the ways our body has to function to sustain life then must be handled in such ways there are two main ways cells divide in an organism; mitosis and meiosis. And they are similar in the way they divide cells, but they do have their differences
First the big main difference between the two is that mitosis is for asexual reproduction…
Exercise 1: Mitosis in Animal and Plant Cells
9. Think back to the pre-lab questions about the differences in plant and animal cell mitosis. Were your predictions correct? What, if any, differences did you actually see?
“If the division of plant and animal cells is observed, the plant cells will not change shape during division while the animal cells will form cleavage, morph and form two rounded cells.” Because this was my prediction, it was correct. The animal cells…
Title of Article: A mitosis mystery solved: How chromosomes align perfectly in a dividing cell
Source of the Article: Whitehead Institute for Biomedical Research
Date of the Article: February 12, 2012
20 Significant Ideas
1. The process of mitotic cell division has been studied intensely for more than 50 years.
2. Using fluorescence microscopy, today's scientists can see the tug-of-war cells undergo as they move through mitosis.
3. Thread-like proteins, called microtubules, extend…
Mitoses are a type of cell division whereby the chromosomes in a cells nucleus are separated into two identical sets of chromosomes each in its own nucleus. Mitoses usually results in two genetically identical daughter cells developing from a single parent cell, and is immediately followed by cytokinesis, which in turn divides the cytoplasm, organelles, cell membrane and karyokinesis. Mitosis is used by unicellular (an organism consisting of only one cell i.e., bacteria) organisms to reproduce;…
is called interphase where the cell grows and develops before dividing; within this, there are three phases: G1, S, and G2. The next stage is called mitosis where the division of the cell actually occurs. During this duplicating process, two identical cells containing the same number of chromosomes and the same generic information are created. Mitosis is broken down into four phases: prophase, metaphase, anaphase, and telophase and cytokinesis.
During prophase, four major things happen. Chromosomes…
All new cells come from previously existing cells. New cells are formed by the process of cell division, which involves both division of the cell’s nucleus (called mitosis) and division of the cytoplasm (called cytokinesis).
Dividing cells experience both of these events along with a period of time between divisions called interphase. During interphase, the nucleus appears normal and the cell is performing its usual cellular functions. Also, the cell is increasing…
What is the difference between Mitosis and Meiosis?
What is the difference between Mitosis and Meiosis? Mitosis self produces cells asexually in single celled organisms. The counterpart of Mitosis is Meiosis. Meiosis occurs in multi-cellular organisms such as plants and animals. The process involves the use of gametes from two organisms such as the egg and sperm for example. In the process of fusion, the gametes combine two different sets of genetic material into one new…
The purpose of mitosis, otherwise known as Cell or Nuclear division, is cell regeneration,
growth, and asexual reproduction,while the purpose of meiosis is the production of gametes
for sexual reproduction. Mitosis is a single nuclear division that results in two nuclei that are
usually partitioned into two new daughter cells. One such cell is blastula, or an animal embryo
at the early stage of development when it is a hollow ball of cells. There are various
differences in how mitosis works with animals and plants cells…
Case Analysis: Dr. Jack Perry, D.D.S.
Dr. Jack Perry had a meeting with one of his employees who suggested that there were several problems in the office. Some of the problems were low morale among the staff, lack of motivation to grow the business, filling cancellations, following up on collections, and engaging in cross-sell procedures. Dr. Perry had noticed these problems previously but felt unsure about his personnel and business management skills. Using his notes from a presentation…