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Various protein-coding genes in bacteria are clustered both in operons that serve as transcriptional units which are co-ordinately regulated. It was Jacob and Monod in year of 1961 who proposed the operon model for the regulation of transcription. The operon model proposes 3 parts that are as follows:
? A group of structural genes instance example genes encoding the proteins to be regulated;
? An operator site, that is a DNA series which regulates transcription of the structural genes;
? Aregulator gene that will encodes a protein which recognizes the operator sequence.
Operons: an overview
Intermediate filaments - Role of Cytoskeleton Structures These filaments are intermediate in size among microtubules and microfilaments and are 10 nm in diameter. Five classes
Leptontene: The chromosomes becomes visible, shorten and thick. The size of the nucleus increase. The homologous chromosomes start getting closer to each other. Z
Elaborate Extracorporial in detail. Outside of the body. An example is extracorporial digestion found in some animals where digestive enzymes are regurgitated into food. Once i
Q. What is the kind of circulatory system present in arthropods? Do these animals have respiratory pigments and heart? In arthropods the respiratory system is open (lacunar). B
Q. Investigations process of acute pericarditis? 1) Blood Examination Erythrocyte sedementaion rate (ESR) may be elevated in tuberculous; collagen and purulent pericarditis.
1. FIBROU S OR IMMOVABLE JOINTS - Occur between the bones of cranium & in the tooth suckets commonly in the form of sutures. 2 . CARTILAGINOUR OR SLIGHTLY MOVAB
A 37-year old woman is admitted to the hospital after complaining of chest pains. She admits to having had severe headaches for several days prior to seeking medical help. She is a
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Cryptorchidism Cryptorchidism or incomplete descent of testis or retention of testis in the abdominal cavity occurs in all domestic species but is seen most commonly in stalli
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