Customer Service Chat
Get quote & make Payment
Largest component of the cell.
Nucleus is double membrane bound dense protoplasmic body that controls cellular metabolism, enclose all the genetic information, and is able to transmit the same to the next generation.
first seen nucleus in fish R.B.C.
coined the name nucleus. Robert Brown observed nucleus in pollen grain and stigma cells.
indicated significance of nucleus in heredity.
while working on unicellular alga
proved that nucleus regulates the activity of cytoplasm and also heredity.
Except mature mammalian R.B.C. and Sieve cell of phloem every living cell has a nucleus.
Procaryotes have incipient nucleus devoid of nuclear membrane, nucleolus and histone. Such type of nucleus is called
Details of nuclear structure, come to be known only after its study under electron microscope.
Nucleus of undividing cell is called
NUMBER, SIZE, POSITION & SHAPE
Normally a cell has single nucleus, this condition is called Uninucleate / Mononucleate / Monokaryotic.
Sometimes a cell may have two nuclei called Binucleate / Dikaryotic cell e.g.
has one macronucleus and one micronucleus, macronucleus controls metabolic activities and micronucleus controls genetic information. Paramaecium aurelia is
with one macronucleus and two micronuclei.
Multinucleate condition found in striated muscle cells, latex vessels, Opalina, Ascaris, polycaryoctes of bone marrow, fungi (Rhizopus) and algae (Vaucheria), which are formed by free nuclear divisions.
Multinucleate condition in plants is called Coenocyte (coenocytic) whereas multinucleate condition in animals is called
Multinucleate condition present in
Cell wall less fungi is called plasmodium.
condition is formed by repeating karyokinesis and
condition is formed by fusion of cells.
Nucleus usually occupies 20% of cells mass. Its size depend upon ploidy, cell maturity and cell function.
Nucleus lies near the geometric centre of the cell, peripharal nucleus present in adipocytes & plant cells.
Nucleus is rounded in young plants and polygonal in animal cells, oval or elliptical in mature plant cells.
Posted Date: 10/5/2012 7:54:22 AM | Location : United States
Ask an Expert
Nucleus, Assignment Help, Ask Question on Nucleus, Get Answer, Expert's Help, Nucleus Discussions
Write discussion on Nucleus
Your posts are moderated
Write your message here..
Electroconvulsive therapy, ELECTROCONVULSIVE THERAPY: 1) ConceptlMean...
ELECTROCONVULSIVE THERAPY: 1) ConceptlMeaning of Electroconvulsive Therapy (ECT) Electroconvulsive Therapy (ECT) is a painless form of electric therapy. It is called as ph
Mass dispersal - population dispersal, Mass Dispersal - Population Dispersa...
Mass Dispersal - Population Dispersal A population is inherently dynamic in nature since individuals are always leaving or entering the populations. But such changes normally
Determination of the age of fossil, DETERMIN A TIO N OF THE AGE OF FOSSI...
DETERMIN A TIO N OF THE AGE OF FOSSIL - Radioactive clock (Boltwood -1907) - Half life of uranium is 4.5 billion years. This means half of total uranium disintegrates
Characteristics of the digestive system of earthworm, Q Which are the organ...
Q Which are the organs and characteristics of the digestive system of earthworms related to the kind of diet of these animals? Small organisms ingested together with soil parti
What is resting membrane potential of an axon, Action potentials include ch...
Action potentials include changes in the membrane potential of an axon, as shown in the schematic below. During the refractory period, sodium channels are inactivated and
Penetrating injury, Penetrating Injury Open pneumothorax (sucking c...
Penetrating Injury Open pneumothorax (sucking chest wound) Hemothorax Tracheobrochiaf injury Pulmonary contusion Mediastinal injury
What is class crinoidea, What is Class Crinoidea? This Class includes t...
What is Class Crinoidea? This Class includes the sea lilies and the feather stars. What makes them different from the other Echinoderms is the placement of their mouth and anus
Sterility assurance, All the efforts that go into the preparation of instru...
All the efforts that go into the preparation of instruments are futile if the sterilization process itself is not successful. There is no way of seeing that instruments are sterile
Explain glomerular filtration in human nephrons, A horticulturist keeps Chr...
A horticulturist keeps Chrysanthemum plants in short-day conditions during long-day season. State its effect on flowering. Specify the role of phytochrome included. Explain glom
Integumentary system - claws, CL A W S - In rabbit and other animals...
CL A W S - In rabbit and other animals claws present, made up of keratine or S. corneum. Dorsal plate is unguise & ventral plate is sub unguise . Helpful in digging
Accounting Assignment Help
Economics Assignment Help
Finance Assignment Help
Statistics Assignment Help
Physics Assignment Help
Chemistry Assignment Help
Math Assignment Help
Biology Assignment Help
English Assignment Help
Management Assignment Help
Engineering Assignment Help
Programming Assignment Help
Computer Science Assignment Help
Why Us ?
~24x7 hrs Support
~Quality of Work
~Time on Delivery
~Privacy of Work
Human Resource Management
Literature Review Writing Help
Terms & Conditions
Copyright by ExpertsMind IT Educational Pvt. Ltd.