Exposure to ultraviolet light darkens the skin by stimulating production of

Which symptoms is a short term effect of tobacco use

Diseases may arise when proteins fail to fold correctly in their last stages of processing and/or are directed towards the lysosome rather than towards the cell membrane. cystic fibrosis is an example of this type of disease. in cystic fibrosis, a functional ion channel is sent to the lysosome for destruction rather than being sent to the plasma membrane. given this observation, the cellular component that is most likely the cause of the disease is the

Poliovirus is an rna virus of the picornavirus group, which uses its rna as mrna. at its 5' end, the rna genome has a viral protein (vpg) instead of a cap. this is followed by anontranslated leader sequence, and then a single long protein-coding region (~7000 nucleotides), followed by a poly-a tail. observations were made that used radioactive amino acid analogues. short period use of the radioactive amino acids result in labeling of only very long proteins, while longer periods of labeling result in several different short polypeptides. what conclusion is most consistent with the results of the radioactive labeling experiment? a) host cell ribosomes only translate the viral code into short polypeptides.b) the rna is only translated into a single long polypeptide, which is then cleaved into shorter ones.c) the rna is translated into short polypeptides, which are subsequently assembled into large ones.d) the large radioactive polypeptides are coded by the host, whereas the short ones are coded for by the virus.