Muscle contraction is the activation of tension-generating sites within muscle fibers. In physiology, muscle contraction does not necessarily
Kelly, who is blind, switches on the fan in her room without anyone's help. she is able to do this because the Somatic nervous system relays the relevant information to her brain.
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Nervous system :</h3>
According to the classical doctrine of the nervous system, an animal's nervous system is a highly sophisticated component that coordinates its movements and sensory data by sending and receiving signals to and from various regions of its body.
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Somatic nervous system :</h3>
The somatic nervous system, also known as the voluntary nervous system, is the area of the peripheral nervous system responsible for the voluntary control of skeletal muscle movement.
A part of the peripheral nervous system called the somatic nervous system is responsible for the voluntary control of skeletal muscle movement.
<h3>Example somatic nervous system</h3>
The cranial nerves, which transmit information from the brain to the head and neck region, are an illustration of the somatic nervous system. In this area, conscious motor functions are under the control of the somatic nervous system.
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Answer:
(C) Aminoacyl-tRNA synthetases have an additional active site that binds to non-cognate tRNAs. The tRNAs that bind to this second active are hydrolyzed and released from the enzyme.
Explanation:
In case of translation, proof reading is done by aminoacyl-tRNA synthetases only. Aminoacyl-tRNA synthetases have two mechanisms to avoid error during translation which are mentioned as under:
<u>(1) Chemical proof reading:</u> Incorrect amino acids rather than being hydrolyzed in catalytic pocket get hydrolyzed in editing pocket and thus they hardly get attached to tRNA.
For example: For distinguishing similar amino acids like isoleucine and valine, isoleucyl-tRNA synthetase uses a second active site which is meant for only valine not for isoleucine. In this particular site, valine which had entered the enzyme is cleaved away with the help of editing reaction after which the enzyme is well prepared to process isoleucine which is the correct amino acid for this enzyme.
<u>(2) Kinetic proof reading: </u>Even if an incorrect amino acid has entered a particular aminoacyl-tRNA synthetase, it does not cause appropriate conformational change in the enzyme because of which the incorrect amino acid loosens from the enzyme and does not get incorporated.
Note: In this example, only chemical proof reading is mentioned not kinetic proof reading.
It is potential energy is converted into apt energy for use in living things.
