Describe the structure and function of the nucleus.
assembly of small and large ribosomal subunits. Singular is nucleolus. - Genes: hereditary units, control cellular structure and direct cellular activities - Chromatin: The threadlike mass of genetic material, consisting of DNA and histone proteins, that is present in the nucleus of a nondividing or interphase cell. - Genome: total genetic info carried in a cell or organism - Nucleosome: Structural subunit of a chromosome consisting of histones and DNA. - Chromatids: One of a pair of identical connected nucleoprotein strands that are joined at the centromere and separate during cell division, each becoming a chromosome of one of the two daughter cells. Look at table 3.2 Describe the sequence of events that occurs in protein synthesis. Protein synthesis Proteome: All of an organisms proteins Gene expression: In the process a gene's DNA is used as a template for synthesis of a specific protein 1. Transcription: the info encoded in a specific region of DNA is transcribed to product a specific molecule of RNA (The process of copying the information represented by the sequence of base triplets in DNA into a complementary sequence of codons.) 2. Translation: The RNA attaches to a ribosome, where the info contained in the RNA is translated into a corresponding sequence of amino acids to form a new protein molecule
Discuss the stages, events and significance of somatic and reproductive cell division.
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