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Reaction specificity
Some enzymes catalyze only one reaction acting on a specific substrate. Example: urease and catalase acts only on urea and hydrogen peroxide, respectively. This is also called absolute specificity.
Many enzymes can catalyze same type of reactions (phosphate transfer, oxidation-reduction, hydrolysis etc.) in several structurally-related compounds. Example: carboxypeptidase acts on protein chains and removes one amino acid at a time from the C-terminal, irrespective of the nature of zimino acid.
A substrate caa undergo many reactions but in a specific reaction, an enzyme will catitlyze only one of these reactions. Example: citrate synthase converts oxaloacetate to citrate in the presence of acetyl-CoA. But, in absence of acetyl- CoA, oxaloacetate is acted upon by a different enzyme malate dehydrogenase with the formation of malate.
CONTRACTI L E CELLS In addition to above mentioned three types of muscular tissue, there are contractile cells. These are as follows. 1. Myoepithelial Cells (= M
Difference between Artificial selection and natural selection - S.No Artificial selection Natural selection 1. It
The holoenzyme is denatured by heat at very high temperature. It is found that two polypeptides, although denatured, contains chains that remain together as a unit, while two other
Do the genes of the X and Y chromosomes determine only sex characteristics? Moreover sex genes the sex chromosomes have also autosomal genes, genes that codify several proteins
Species Diversity Species diversity means the differences between species (both domesticate d and wild). It is the most visible component of biodiversity as implied by the word
Explain the Composition of MacConkey Agar? Bactopeptone - 17.0 gm Protease Peptone - 3.0 gm Lactose - 10.0 gm Bile salt mixture - 1.5 gm Sodium chloride - 5.0 gm
a) Which region of the retina gives the most accurate interpretation of the image? b) What type of light-sensitive cell is present in this region? (a) The fove
1. In chickens rose comb ( R ) is dominant over single comb ( r ). A rose-combed male is mated to a rose-combed female. Eighteen chicks are produced, ten of which are rose-combed,
Uterine Torsion Incidences of uterine torsions in cattle and buffaloes are not common. However, they are very common in heavy breeds and buffaloes and animals in slopy terrain
Q. What are biopolymers? Ans. Polymers are macromolecules made by the union of several smaller identical molecules, called monomers. Biopolymers are polymers present in th
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