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Eukaryotic Cell -Receptors Transcription Translation

Eukaryotic Cell -Receptors Transcription Translation

 

Eukaryotic Cell -Receptors Transcription Translation
Image Number: 185-009
Dimensions: 6 x 8.1 @ 310 DPI
Media Used: Digital
Formats Available: Digital
Title: Eukaryotic Cell -Receptors Transcription Translation
Customization: Available
Image Description:  Eukaryotic cell signaling a complex series of protein pathways involving legands, receptors, endocytosis, exocytosis, protein synthesis and ior channels.

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Eukaryotic Cell -Receptors Transcription Translation


  View Image #185-009 Eukaryotic Cell -Receptors Transcription Translation #185-009  
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Eukaryotic cell signaling a complex series of protein pathways involving legands, receptors, endocytosis, exocytosis, protein synthesis and ior channels.


  View Image #185-008 Eukaryotic Cell - Cell Signaling Puzzle, Receptors, Transcription,Translation #185-008  
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Cell Signaling Puzzle, Receptors, Transcription, Translation. Eukaryotic cell signaling a complex series of protein pathways involving legands, receptors, endocytosis, exocytosis, protein synthesis and ior channels.


  View Image #185-002 Retroviral Vector - Gene Insertion, DNA Transcription, Translation #185-002  
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Gene insertion, DNA transcription, translation. Retrovirus used as vector to insert gene encoding granulocyte-macrophage CSF into tumor cell nucleus. Transcription, translation, gene espression.


  View Image #118-114 Meiosis, Cells #118-114  
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Meiosis, Cells. Meiosis and cell division is the process by which one diploid eukaryotic cell divides to generate four haploid cells often called gametes. The word "meiosis" comes from the Greek meioun, meaning "to make smaller," since it results in a reduction in chromosome number in the gamete cell. Among fungi, spores in which the haploid nuclei are at first disseminated are called meiospores, or more specifically, ascospores in asci (Ascomycota) and basidospores on basidia (Basidiomycota). Meiosis is essential for sexual reproduction and therefore occurs in all eukaryotes (including single-celled organisms) that reproduce sexually. A few eukaryotes, notably the Bdelloid rotifers, have lost the ability to carry out meiosis and have acquired the ability to reproduce by parthenogenesis. Meiosis does not occur in archaea or bacteria, which reproduce via asexual processes such as mitosis or binary fission. During meiosis, the genome of a diploid germ cell, which is composed of long segments of DNA packaged into chromosomes, undergoes DNA replication followed by two rounds of division, resulting in haploid cells called gametes. Each gamete contains one complete set of chromosomes, or half of the genetic content of the original cell. These resultant haploid cells can fuse with other haploid cells of the opposite sex or mating type during fertilization to create a new diploid cell, or zygote. Thus, the division mechanism of meiosis is a reciprocal process to the joining of two genomes that occurs at fertilization. Because the chromosomes of each parent undergo genetic recombination during meiosis, each gamete, and thus each zygote, will have a unique genetic blueprint encoded in its DNA. In other words, meiosis and sexual reproduction produce genetic variation. Meiosis uses many of the same biochemical mechanisms employed during mitosis to accomplish the redistribution of chromosomes. There are several features unique to meiosis, most importantly the pairing and genetic recombination between homologous chromosomes.


  View Image #118-110 Meiosis, Cells #118-110  
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Meiosis Cells. Chromatid separation forming four daughter cells, also called the Equational Division. In biology, meiosis (pronounced mi-o-sis or me-o-sis) is the process by which one diploid eukaryotic cell divides twice to generate four haploid cells. In animals, meiosis always results in the formation of gametes. The word "meiosis" comes from the Greek meioun, meaning "to make smaller," since it results in a reduction in chromosome number in the gamete cell. Meiosis is essential for sexual reproduction and therefore occurs in all eukaryotes (including single-celled organisms) that reproduce sexually. During meiosis, the genome of a diploid germ cell, which is composed of long segments of DNA packaged into chromosomes, undergoes DNA replication followed by two rounds of division, resulting in four haploid cells. Each of these cells contain one complete set of chromosomes, or half of the genetic content of the original cell. If meiosis produces gametes, these cells must fuse during fertilization to create a new diploid cell, or zygote before any new growth can occur. Thus, the division mechanism of meiosis is a reciprocal process to the joining of two genomes that occurs at fertilization. Because the chromosomes of each parent undergo genetic recombination during meiosis, each gamete, and thus each zygote, will have a unique genetic blueprint encoded in its DNA. Together, meiosis and fertilization constitute sexuality in the eukaryotes, and generates genetically distinct individuals in populations.

 
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