What Is RNA?
Jun 26, · Differences between Prokaryotic and Eukaryotic cells. Depending on the internal structure of cell, organisms are divided into two types i.e. prokaryotic and facetimepc.coyotic organism are those which lacks true nucleus and membrane bound cell organelles. Dec 13, · The Nucleolus is located inside the nucleus. The main function of the nucleolus is to make ribosomal RNA (rRNA). rRNA then combines with special proteins to form the basic units of ribosomes. Once these units are formed the nucleolus releases them out of the nuclear envelope where they will be fully assembled into ribosomes.
Depending on the internal structure of cell, organisms are divided into two types i. Prokaryotic organism are those which lacks true nucleus and membrane bound cell organelles.
Eukaryotic organisms are those organisms which have true nucleus with nuclear and nucleolus and also contain all membrane bound cell organelles. Contain part of respiration and in some photosynthetic machinery. Sterol and carbohydrate is present that serve as receptors. What is the job of a nucleolus not carry out respiration and photosynthesis. Glycocalyx Present as a capsule or slime layer.
Present in some cells that lack cell wall. Cell wall Usually present. Chemically complex typical bacterial cell wall includes peptidoglycan. When present, chemically simple includes cellulose and chitin. Extrachromosomal plasmid Present. Nonessential prokaryotic genes are encoded on extra chromosomal plasmid. Absent Transcription and translation Occur simultaneously.
Transcription occurs in nucleus and then translation occurs in cytoplasm. Respiration Many strict anaerobes. All aerobic, but some facultative anaerobes by secondary modification. Photosynthetic enzymes Bound to plasma membrane as composite chromatophores. Enzymes packed in plastids bound by membrane. Nitrogen fixation Some possess this ability. None possess this ability. Metabolic mechanism Wide variation Glycolysis, electron transport chain, Krebs cycle. Duration of cell cycle Short, takes minutes to complete.
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True nucleus is absent. Nucleus lack nuclear membrane and nucleolus. Such nucleus is called nucleoid. Performs the function of Golgi bodies and mitochondria and also help in the separation of chromosome during cell division.
Larger size 80s, found on membranes as in endoplasmic reticulum; 70s present in organelles such as chloroplast and mitochondria. Generally lack sterol and no carbohydrate. Usually present.
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Apr 22, · The liver of a dog has been found to have higher than normal cell death because the DNA is damaged. What part of the cell failed to do its job of protecting the DNA of the cell? A. Chromosomes B. Nucleus C. Nucleolus D. Nuclear envelope. Jan 17, · Nucleolus. It is the small oval body which is rich in protein and RNA (Ribonucleic acid). Ribosome formation occurs in nucleolus. Ribosome is an organelle which is present in cell and directly or indirectly helpful in survival of cell. Nuclear material. It contains chromosome and made up of DNA (Deoxyribonucleic acid) and protein. Ribosomes are produced in the nucleolus. Ribosomes translate information encoded in mRNA and link specific amino acids to form polypeptides. This process is called protein translation. Specific interactions between mRNA, ribosome, and tRNA take place at A, P, and E .
What was the total cost to ship this particular item? Search for an answer or ask Weegy. There are no new answers. There are no comments. Add an answer or comment. Log in or sign up first. Mi Ming. The liver of a dog has been found to have higher than normal cell death because the DNA is damaged. The nuclear envelope part of the cell failed to do its job of protecting the DNA of the cell.
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