1) The cell membrane surrounds the cytoplasm and prevents it from spreading out of the cell
2) Albumin which is a protein transport free fatty acids, which result from lipid digestion, in the blood stream by binding to it
3) The nucleus contains the chromosomes which carry the DNA on them
Sebaceous glands are present on all skin surfaces except on the palms, soles, lips, and parts of the external genitalia.
Sebaceous glands are part of the pilosebaceous unit. There are generally numerous sebaceous glands per each hair follicle. Sebaceous glands are true exocrine glands made up of lobules and ducts.
The lobules are made up of sebaceous cells which produce sebum, a fatty substance that lubricates hair and has bactericidal and fungicidal properties.
These sebaceous or oil glands are also classified as holocrine exocrine glands. It means that the entire sebaceous cell loses its cytoplasm and dies in the process of discharging its contents during the excretory process toward the middle of the gland into its lumen.
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Answer/Explanation:
A mutation alters the sequence of DNA. Therefore, the mRNA that is transcribed from the DNA has a different sequence.
This mRNA goes on to be read by the protein synthesis machinery in the cell. The protein synthesis machinery translates the sequence of the mRNA into an amino acid sequence, which makes up the protein.
If the sequence of the mRNA is different, due to a mutation in the DNA, then the cell will translate a different sequence into an amino acid. This alters the composition of the protein.
Mutations can be small, and affect only one amino acid, or they could be huge, and impact the entire protein.
Mutations have very different consequences in gametes vs non-gamete cells.
If a mutation occurs in a gamete, that means the mutation will be passed on to the next generation, as it is contained in the DNA in the egg or sperm that becomes fertilised to make a gamete.
However, mutations that occur in other cells are not passed on to the next generation. That does not mean they do not have effects. E.g. mutations in the skin caused by exposure to UV rays from the sun can contribute to cancer, but would not be passed on to the individual's children
