The expression of gene can be controlled at different levels in the eukaryotes. Transcriptional Control of Gene Expression The RNA synthesis depends on RNA polymerase enzymes. Numerous proteins called transcription…
TERMS DEFINITIONS Respiration The series of oxidation reduction reactions in which substances (glucose) are oxidized to carbon dioxide and oxygen and energy is releasedis called respiration. Aerobic respiration Aerobic respiration…
IN PROKARYOTES (LAC OPERON) In bacteria, expression of gene is controlled at transcription level. Operon model of control of gene expression was described by Francois Jacob and Jacques Monod in…
The organic substances of the cells used up in the respiratory process are called respiratory substrate. There are following respiratory substances. I. Carbohydrates: Simple carbohydrates are the chief respiratory material.…
The synthesis of protein at the ribosomes form mRNA is called translation. Role of tRNA in Translation Transfer RNA (tRNA) plays an important role in translation. It reads codes on…
The respiration which takes place in absence of oxygen is called anaerobic respiration. There are two views about the origin of fermentation: (a) It is an evolutionary bypass. Some organisms…
The synthesis of messenger RNA from DNA is called transcription. The genetic information in DNA is not translated directly into proteins. These information are first transcribed into mRNA. Many enzymes…
The synthesis of ATP molecule in the presence of oxygen is called oxidative phosphorylation. Oxidative phosphorylation takes place during respiratory chain. Three ATP molecules are formed during three steps of…
The genetic code is a sequence of three bases—a triplet code. DNA must code for the 20 different amino acids. DNA has information carrying capabilities. These information are present in…
The collection of electron carrier molecules embedded in the inner membrane Of the mitochondrion is called electron transport chain. -I -he folding of the inner membrane forms cristae. These cristae…
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