Answer:
1. proteins are assembled on ribosomes
2. proteins targeted for export to the cell membrane, or to specialized locations within the cell. They complete their assembly on ribosomes bound to the rough ER
3. Newly assembled proteins are carried from the rough ER to the golgi apparatus in vesicles
4. the golgi apparatus further modifies proteins before sorting and packaging them in the membrane-bound vesicles
5. vesicles from the golgi apparatus are shipped to their final destination in or out of the cell
Explanation:
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Answer:
e. is under purifying selection
Explanation:
Purifying selection removes deleterious alleles that can arise through
random mutations
.
Mutations may or may not have consequences at the level of genetic expression depending on whether those mutations are synonymous or nonsynonymous. Synonymous mutations do not generate changes in the protein to be encoded while non-synonymous ones do.
Important genes for the development of the organism - such as those involved in the neural development- are very likely to be under purifying selection, eliminating individuals with deleterious alleles since those alleles (product of non-synonymous substitutions) do not allow the individuals to survive.
Carbon monoxide is the most common type of poisoning by gases
Answer:
There is about 6000 satellites surrounding our earth. A satellite orbits Earth when its speed is balanced by the pull of Earth's gravity. Without this balance, the satellite would fly in a straight line off into space or fall back to Earth. Satellites orbit Earth at different heights, different speeds and along different paths.
It could be the cell membrane which is a barrier, thinner than the cell wall, that protects the cell and controls transport from within and outside the cell.
