Answer:
Option B
The plicae circulares, villi, and microvilli
Explanation:
The plicae circulares are the folds of mucous membrane on the inside of the small intestine. They are covered with tiny hair-like structures called the villi, and microvilli. The purpose of those folds is to increase the surface area for the absorption of food nutrients to take place in the small intestine before the food finally moves on to the large intestine for excretion.
The tiny hair-like projections (villi, and microvilli) further increase the surface area available for nutrient absorption by providing extra surfaces in which the nutrients can diffuse into the small intestine through.
This makes option B correct.
Answer:
An amino acid activates the repressor so that the repressor binds to the operator and prevents transcription.
Explanation:
In an operon, promoter is followed by operator which is finally followed by the structural genes to be transcribed. RNA Polymerase binds to the promoter and initiates transcription. A repressor can negatively control the transcription process by binding to the operator so that the RNA Polymerase is not able to move forward and transcription is halted.
For example: in trp operon, tryptophan amino acid binds to the repressor molecule which leads to change in repressor's shape. The repressor is now able to bind to the operator and prevent transcription.
The most forward two teeth in the upper or lower mouth are incisors
Thermoreceptor ensory receptors would most likely have been damaged by the burn.Pain receptors (officially called nociceptors) receptors were responsible for alerting your brain to the burn.
Nociceptors are nerve endings located all over your body. They’re found on your skin, muscles, internal organs, and more. Their job is to detect any damage done to your body and to report it to your brain by sending a message.Signals from skin thermoreceptors are relayed via separate but parallel neural pathways from cold and warm sensors whose sensory nerve endings in the skin have cell bodies in dorsal root ganglia that project to neurons in the dorsal horn of the spinal cord.
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Without water in the mitochondria, the cell would be unable to hydrolyze unstable ATP into usable, and more stable, ADP, thus there would be no production of usable energy for cellular processes.
