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Genetic material – DNA and RNA

By | 2014-07-18T08:01:29+00:00 June 12th, 2013|Molecular Biology|

     Nucleic acids contains information regarding the amino acid sequence that results in protein of functional importance.DNA - Deoxy ribo Nucleic Acid act as cellular library that contains necessary information for building cells and tissues of an organism. RNA – Ribo Nucleic  Acid has pivotal role in protein synthesis.Structure of DNA and RNA composed of multiple chemical units(polymer) of single chemical units(monomers) called Nucleotides. Length:DNA : composed of several Read more [...]

Chromosome

By | 2015-07-05T17:37:23+00:00 June 7th, 2013|Genetic material|

What is Chromosome? Chromosomes are thread like structures which are located inside nucleus of all plant and animal cells. Each chromosome comprises of protein and a single molecule of deoxyribonucleic acid (DNA). DNA are passed from parents to offspring. DNA contains those specific instructions that build each type of living creatures unique among themselves.Chromosomes are a key part of the important process that ensures if DNA is accurately copied and distributed in vast majority of cell Read more [...]

Meiosis

By | 2014-07-21T13:32:43+00:00 May 29th, 2013|Cell cycle|

Meiotic cell division occurs in reproductive cells of plants and animals.Meiotic cell division is also known as "Reduction division" where diploid number of chromosomes are reduced to haploid(number of chromosomes reduced to half).Meiosis consists of two complete division.Meiosis I or heterotypic division(no.of.chromosomes reduced to half) Meiosis II or homotypic division (mitotic or equational)During sexual reproduction two gametes(male and female) each having same set of chromosomes(n) Read more [...]

Mitosis

By | 2014-07-18T08:06:25+00:00 May 29th, 2013|Cell cycle|

Mitotic cell division is first described by W.flemming in 1882(in plant cell by Strasburger).Karyokinesis(DNA duplication followed by nuclear division) followed by cytokinesis(cytoplasm of single eukaryotic cell is divided to form daughter nuclei).Amitosis: This type cell division is usually occurs in prokaryote. Its a simple type of cell division.All the cell contents including nucleus divide into two equal halves by means of inwardly growing constriction in the middle of the cell.In Read more [...]

Cell division

By | 2015-08-23T15:38:10+00:00 May 29th, 2013|Cell Biology, Cell cycle|

Cell division is a special biological process by which a cell gets divided into two or more new cells. During cell division, a cell’s nucleus splits up and the DNA is replicated. There are broadly two types of cell division : mitosis and meiosis.Most of the time when we refer to “cell division”, we mean mitosis, a process of making new body cells. Where meiosis is the separate type of cell division that only creates eggs and sperm cells. Because this mitosis cell division is so critical, Read more [...]

Chloroplast

By | 2015-08-23T15:42:54+00:00 March 26th, 2013|Cell organelles|

Chloroplast are the structure within the cells of plants and green algae which is the site of photosynthesis, a process by which sunlight energy gets converted into chemical energy, resulting in production of oxygen and energy-rich organic compounds. So, Chloroplasts can be considers as food producers of the cell. Animal cells do not have chloroplasts. Plants are the basis of entire life on Earth. They are classified as the producers of world. During the process of photosynthesis, Read more [...]

Plastids

By | 2015-08-23T16:11:58+00:00 March 26th, 2013|Cell organelles|

                  Plastids are the largest cell organelles bounded by double membrane. These are found in most of the plants cells. These are absent in prokaryotes and animal cells. It’s of three types.1.Chloroplasts 2.Chromoplasts and 3.Leucoplasts.                                             Plastids by LadyofHatsPlastids are huge cytoplasmic organelles. Plastids are major organelles and are found in the cell of plants and in algae. Plastids Read more [...]

Ribosomes

By | 2015-08-23T16:25:02+00:00 March 26th, 2013|Cell organelles|

            In every living being, cells need to make proteins. Enzymes that are made of proteins are used to help seed up the biological processes. Other proteins do support other cell functions and are found embedded in membranes. Proteins even builds up most of your hairs. When a cell requires to make proteins, it looks for ribosomes. Ribosomes are basically the proteins builders or we can say protein synthesizers. They can be thought just like construction guy, who connects one Read more [...]

Mitochondria

By | 2015-08-23T16:04:01+00:00 March 26th, 2013|Cell organelles|

 Mitochondria are known as powerhouse of a cell. They are nothing, but organelles that acts like a digestive system of the cell, which takes in nutrients, breaks them up, and creates energy rich molecules to get utilized by the cell. The biochemical processes of a cell are called as cellular respiration. Many of the reactions that are involved in the cellular respiration happens into the mitochondria. Thus, we can say that mitochondria are the working organelles that keep its cell Read more [...]

Nucleus Structure and Functions

By | 2015-08-24T14:48:32+00:00 March 24th, 2013|Cell organelles|

          The cell nucleus acts like brain of the cell. It helps control eating, in movement and reproduction. If anything of them happens in the cell, chances are that nucleus knows about it. It is not necessary for the nucleus to be in the center of the cell. It can be spotted as a big dark spot somewhere in middle of all the cytoplasm (cytosol). One will not probably find it near the edge of cell because that might be dangerous.NucleusStructure of Nucleus by Read more [...]