Cell And Molecular Biology

4. The Nucleolus
Nucleolus is present inwardly the nucleus.(It is a small thumping made of DNA, RNA & proteins) Metabolically active cells have spacious distinct nucleoli. Function: formation of ribosomal RNA, when ribosomal RNA is produced and joins with proteins to form ribosomes. ribosomes.
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When ribosomes atomic number 18 made they move out of the nucleus through pores in nuclear membrane to cytoplasm for further maturation.

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5. The Ribosomes
Ribosomes are organelles represent of proteins(histone 50%) proteins(histone 50%) and rRNA(50%). rRNA(50%). They are found on the bulge of rER (attached ribosomes) & also free in ribosomes) the cytoplasm. They are present in all cells especially where Protein synthesis is taking place (occurs at the ribosomes). ribosomes).
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Types of ribosomes: a-free ribosomes; not synthesis protein but act as obligate in cytoplasm as for hemoglobin in growing RBC. b-attached ribosomes; for synthesis of special proteins as hormones or enzymes, packaging within golgi apparatus.
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Ribosomes
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5. Mitochondria
Mitochondria (singular, mitochondrion) cigar shaped. They are called the powerhouse of the cell; they are the site of elan vital production (ATP). Mitochondria convert the chemical energy of glucose products into the chemical energy of ATP molecules.



Mitochondria use up oxygen and give finish up carbon dioxide and water. Oxygen in breath enters cells and then mitochondria. 33

mitochondrion has a double membrane. The inner(a) membrane is folded to form cristae The inner space is called the matrix.

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Mitodhondrion
http://www.modares.ac.ir/elearning/Dalimi/Proto/images/Lec tures/
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The matrix contains a gel-like fluid, and gelenzymes that metabolizes pyruvate from lay off down of glucose, and fatty acids. The respiratory chain is located in the inner membrane and produces ATP. ATP is used by cells for synthesis of molecules, contraction of muscles, conduction of nerve impulses.

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6. Endoplasmic Reticulum (ER)...If you want to ca-ca a full essay, order it on our website: Orderessay



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