Answer:
The ability of sequences within the leader mRNA to pair with one another and form stem-lopp structures
Explanation:
A form of feedback regulation controls the trp operon by regulating transcription termination, a mechanism referred to as Attenuation.
-In the presence of high concentrations of tryptophan, RNA polymerase ceases transcription shortly after initiation in a region called the leader sequence.
-If the concentration of tryptophan is low, transcription does not terminate until the entire operon is transcribed. The mechanism of attenuation links alternative RNA secondary structures to transcription termination.
-Immediately after transcription, RNA from the leader region folds into one of two alternative secondary structures.
-One of these structures is a transcription termination signal that stops RNA polymerase from continuing to the end of the operon.
-The alternative structure does not contain a transcription termination signal and allows transcription of a single mRNA that encodes all the structural genes.
-The decision as to which of the two alternative RNA structures formed is regulated by the concentration of tryptophan.
<span>Human genetic disorders can be caused largely by the change of the DNA sequence from its normal sequence. This can also be caused by a monogenic disorder, a mutation in a gene. So the best answer to this question would be letter B since nondisjunction causes chromosomal abnormalities.</span>
Under normal conditions, some interstitial fluids slowly escape through the epidermis via a process called epidermis/trans-epidermal water loss.
Interstitial fluids are the fluids filled between the spaces present around the cells. This fluid is present due to the leakage of substances from the blood capillaries. It also aids in transport of oxygen, nutrients and removal of waste product from the cell.
Epidermis/trans-epidermal water loss is the passive evaporation of water from the skin. This is the reason why skin sometimes may feel very dry after a person wakes up. This evaporation happens de to the presence of water vapor gradient across both sides of the skin.
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Giraffes have a compensatory precision in their movements, so that although it takes longer for them to respond to stimuli, they might do it more accuracy. The move fiber in a given nerve, the more fine-tunes a response to stimuli.
Mutualism is the symbiosis when both are benefited !!
