What does the nucleus do?
The nucleus is the data storage center of the cell, and it's head command. Basically, it houses the DNA, which contains the instructions for everything about you. Sections of DNA are copied in the nucleus, and these copies are called mRNA, which are able to leave the nucleus to further assist in Protein development, and from there the proteins do a variety of functions. Basically, if a part of the DNA is copied, it elicits a cellular response after a change of events, that could change how your body functions or is.
In which stage of the cell cycle do the nucleus and it's contents divide?
If you are referring to mitosis (which is the division of the nucleus), then it is in the "M phase" ("M" stands for "Mitotic") that the nucleus divides (as in its contents, such as its chromosomes). However, the "M phase" is a part of Interphase--which is NOT a part of mitosis. Interphase consists of four phases: G1 phase (newly made cell goes through growth, such as developing organelles), S phase (DNA is replicated here), G2 phase (cell makes additional preparations for cell division), and finally M phase (made up of mitosis [division of the nucleus] and cytokinesis [separate from mitosis because it is the division of the cell's cytoplasm to create two individual cells from one]).
Diseases of the cell nucleus?
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What is the nucleus of an atom?
In layman, the nucleus of the atom is a dense cluster of protons and neutrons (and some other sub - atomic particles but they aren't too big of a deal :)) The nucleus makes up virtually all of an atom’s mass, but is small in comparison to the atom (over 99% of an atom is empty space).You may wonder what keeps the protons together if they are all positively charged? Well friend, the nucleus is held together by the Strong Force (brilliant right?), and it keeps the protons from fighting.Nuclei are very strong, it requires much energy to alter them, this is where nuclear energy and even nuclear weapons are developed. This is called fission and fusion.Overall if this universe is made up of approximately 10^82 atoms (10 followed by 82 zeros) it is only logical to state nuclei are most of this protean and impermanent universe!
What evidence can you cite that the nucleus of the galaxy contains a supermassive black hole?
There are numerous stars with orbital motions consistent with the presence of a SMBH. Check out any number of Universities or Astronomical Research institutions or even magazines like "Astronomy" or "Sky & Telescope". The quality of the answers you may receive here will pale in comparison to the quality of information you can find even at your local Astronomy Club. Go ahead, give it a try. Contact your local Astronomy Club (not Astrology) and talk to some of those folks. I hope this helps. Good luck.
Where is the nucleus in an animal cell?
The nucleus is known as the heart of the cell which contains the genetic material that almost all of the cell’s DNA is confined, replicated and transcribed. The nucleus controls all the metabolic as well as hereditary activities of the cell.Image Source : GoogleThe nucleus is found in all the eukaryotic cells of the plants and animals. Also certain eukaryotic cells such as mature seive tubes and mature mammalian erythrocytes lack nucleus. In such cases, the nucleus are present during the early stages of development.POSITION :The position of nucleus in a cell is characteristic of the cell type and also it is often variable. Usually the nucleus remains in the center, but it may change according to the metabolic activities of the cell. In Embryonic cells the nucleus generally occupies the Geometric position of the cell but once when the cells start to differentiate and the rate of metabolism increases, the position of the nucleus displaces. For example in Glandular cells the nucleus is located in the Basal portion of the cell.
Why does an electron move around the nucleus? Where does it get energy?
Why does an electron move around the nucleus? Where does it get energy?The most important question is, “Where does it get energy?” And where does anything get its energy.This could be explained if we discard the Singularity Theory and assume the Big Separation Theory where from Nothingness, (+) gravitons and (-) anti-gravitons were created to explain the Big Bang. In other words, the power source was gravity acting against repulsive gravity.So now we have a (+/-) Binary Universe System where there is a potential difference created between our universe of regular matter and the anti-universe of dark matter.This is similar to a charged battery where (-) electrons of the negative terminal want to unite with the (+) positive terminal. And in the process create energy in the form of a voltage. And that would explain the energy needed for an (-) electron to move around the (+) nucleus.Think of an (+/-) atom as a Fractal of our (+/-) Universe. And if you train your mind to think in terms of Fractals, it's amazing how problem solving can be so easy. In other words, seeing relationships on both small and large levels, and using a known relationship and extrapolating it to another.It has been noted that Nature keeps repeating itself all throughout the Cosmos, and then it’s simply a matter of identifying one relationship that solved a problem, and applying it to another relationship.And this “Fractal type voltage” that is created at the time of the Big Separation/Big Bang, is still continuing today, and explains EM + the strong/weak nuclear forces. If you think of our (+/-) universe as a charged battery then all the laws of physics and chemistry can easily be explained.The first part of the question, “Why does an electron move around the nucleus?”This can be explained if an electron is viewed not so much of a particle, but more of an EM wave that circles the nucleus in quantized orbits. And yes, the electron does radiate energy in the process, but then this energy that is lost is absorbed when the electron circles back on itself in a wavelength or 1/2 wavelength pattern, creating a resonance and thus forming a standing wave which prevents the electron from crashing into the nucleus.
What is function of nucleus?
The nucleus is an organelle found in eukaryotic cells. Inside its fully-enclosed nuclear membrane, it contains the majority of the cell's genetic material. This material is organized as DNA molecules, along with a variety of proteins, to form chromosomes. The nucleus is made up of a double membrane nuclear envelope that keeps the entire organelle encased, isolating its contents from the rest of the cell, and the nucleoskeleton which supports the cell as a whole. The nucleus maintains the security of the genes and controls the functions of the entire cell by regulating gene expression. This is why the nucleus is sometimes referred to as the control center, or the "brain," of the cell. Since large molecules cannot get inside the nucleus through the nuclear membrane, small holes called nuclear pores dot the surface area of the envelope. These pores regulate the transport of those molecules by carrier proteins embedded in the double layer of the membrane. Small molecules and ions are able to pass through the membrane freely, however. The nucleus is the site for genetic transcription, while keeping it separated from the cytoplasm. This means gene regulation is taking place in eukaryotic cells that have a nucleus, but that this gene regulation isn't available to prokaryotes. That means the main function of the nucleus is to govern gene expression and facilitate DNA replication during the cell cycle.
Do cells need a nucleus to function?
not necessarily, however it may depend on the cell stage in which you ask the question. for example, erythrocytes (Red blood cells) first develop with a nucleus to produce all of the proteins and enzymes needed to function, of which include hemoglobin. after the red blood cell matures, the nucleus disintegrates and hemoglobin dictates the activity of the cell with the cooperative binding to oxygen. so, it just depends on the cell state when you ask the question
What force keeps electrons moving around the nucleus of an atom?
Electrostatic force. And its a conservative force like gravity. However they are not moving in the usual sense. At these very tiny dimensions things cannot be localised as accurately as we like. Heisenberg uncertainty dominates.From Feynman's Lectures on PhysicsThe Feynman Lectures on PhysicsWe calculate the size of atomic shells based on momentum uncertaintyFeynman answers your question best:Pauli and Dirac take this and calculate the size of shells when ekectrons interact and from that stationary energy states and energy levels. From this we can predict the periodic tableThink about thatThe Periods used by Mendelev to classify the elements is predicted from the uncertainty associated with interaction of protons and neutrons!The physicists have taken over chemistry!Thats why Heisenberg became so famous!If Drexler has his way engineers will take chemistry from the physicists as we reach the singularity but not before they take over biology first!Videos I like: that address this issue: