Imagine that you repeat the tRNA Selection experiment with modifications as follows: 1. Synthesize mRNA containing A's and G's only (poly-AG in random order). 2. Convert the amino acid Glutamic acid (Glu) on its tRNA to the amino acid Glutamine (Gln) as shown below. 3. Mix your poly-AG RNA, your artificial TRNA, and cell extract (contains ribosomes, amino acids, all normal tRNAS, and the energy source for translation). Glu Gln CỤC CUC Glutamic acid (Glu) is encoded by GAA and GAG, while Glutamine (GIn) is encoded only by CAA and CAG. Given this, and based on what you know about tRNA selection, will Glutamine (Gln) be found in the resulting polypeptides? (Assume translation will happen even without a start codon.) O Yes, because the amino acid is selected based on the TRNA anticodon sequence. O No, because the ribosome selects the TRNA based on the attached amino acid. Yes, because all of the normal RNAS, including tRNA Gln are present in the assay. O None of the above
Anatomy and Physiology of Special Sensory Organs
Sensory organs can be labeled as special sensory structures that permit sight, hearing, odor, and flavor. Sensory structures permitting proprioception, touch, thermal, and pain perception can be classified as more advanced sensory organs. The sensory neurons are trained to find out modifications in the external and internal conditions so that a person's body can react to that change. A stimulus is the first signal that is recognized by any sensory receptor of the body. Stimulus is an impulse generated when there is a change in the surroundings of a person. For example, a heated environment will alert the brain through the thermal sensory organs and generate a reflex accordingly.
Sensory Receptors
The human sensory system is one of the most complex and highly evolved structures, which processes a myriad of incoming messages. This well-coordinated system helps an organism or individual to respond to external stimuli, appropriately. The sensory receptors are an important part of the sensory system. These receptors are specialized epidermal cells that respond to external environmental stimuli. These receptors consist of structural and support cells that form the peripheral unit of the receptor and the neural dendrites which receive and detect the external stimuli.
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