The type of proteins that can function as the chemical messengers or as the receptors in the plasma membrane is a communication proteins; option A.
Proteins are large macromolecules composed of chains of amino acid units linked together by peptide bonds.
Proteins serve various functions such as:
communication
transport
defensive
enzyme
Communication of proteins such as the hormones can be function as the chemical messengers or as receptors in the plasma membrane.
Proteins are made up of hundreds or the thousands of the smaller units called as amino acids, which are attached to one another in the long chains. There are about 20 different types of amino acids that can be combined to make a protein.
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Answer:
A. Phospholids and B. Steroids.
Explanation:
Lipids are fatty waxy molecules which are smaller than proteins that completes a lot of basic structures in both animals and plants inclusive.
They are been used by the body alongside proteins, sugars, and minerals. They can be found in many parts of a human: cell membranes, cholesterol, blood cells, and in the brain, to name a few ways the body uses them. The commonest of lipids are the steroid lipids which are seen in female oestrogen and in the male testosterone.
The best and most correct answer among the choices provided by your question is the first choice or letter A.
<span>The promotion of companies’ sustainably harvested rainforest products is intended to produce cheaper poduets. </span>
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Constant means non-changing, so constant would refer to something that stays the same, does not change.
So the correct answer is this one: the quantity that must remain the same