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Gene repressor proteins which inhibit the transcription of particular genes in eukaryotes also exist. They may act by binding either to control parts within the promoter region near the gene or at sites located a long distance away from the gene, called as silencers. The repressor protein should inhibit transcription directly. One instance is the mammalian thyroid hormone receptor that, in the absence of thyroid hormone represses transcription of the goal genes. Furthermore, other repressors inhibit transcription by blocking activation. This can be get in one of several ways: by blocking the DNA binding site for an activator protein, through binding to and masking the activation domain of the activator factor, or by forming a non-DNA binding complex with the activator protein. Several instance of every mode of action are known.
Roots have no chlorophyll and grow in darkness. So how do roots obtain their food? Food made in the leaves is transported to the roots in the phloem of the vascular bundles.
what is example of class,genus and species of platyhelminthes?
Potato type: Potato A: Beginning displacement (ml)= Ending displacement (ml) = Potato B: Beginning displacement (ml)= Ending displacement (ml) = Potato type: Potato A: Beginn
What is an example of animal coming from the phylum arthropoda?
Leptospirosis It is a bacterial disease that occurs in many domestic and wild animals, is endemic worldwide, but the highest incidence is in tropical and subtropical areas. Tr
what is the mode of nutrition of ascaris
Global Air Circulation The major wind systems of the earth result because large masses of air around the earth's equator are forced to rise from the bottom due to surface heati
Protoplasmic - Level of body organization Organisms which are made of just one cell are the simplest and the most primitive creatures called unicellular organisms. Their level
In a properly functioning negative feedback system, the A. value of the controlled variable will always be very close to the threshold value when the system is in steady state.
Gum Arabic Gum Arabic or Gum Acacia is the oldest and best known of the natural gums. Gum Arabic is the natural exudate produced by various species of the thorny Acacia trees
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