<span>Amino acids are
weak acids that have at least 2 pka values. They have two titratable protons
that composed of alpha carboxyl (-COOH) and alpha amino (-NH3+), but some amino
acids have a third titratable protons with ionizable groups in the R side chain.
In addition, the structure of amino
acids in peptides and proteins are determined by the charges of the titratable
group and by the R group. </span>
Q. The contraction cycle is triggered by the rise in ________ released from the sarcoplasmic reticulum (SR).
A. Ca2+
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Any more questions, please feel free to ask me and I will gladly help you out!!
~Zoey
Answer:
it gives a visual representation about the data collected and makes it easier to read
Answer: B. They are a first line of defense that can begin killing pathogens immediately.
Explanation:
B-lymphocytes are not the first line of defense. On the contrary, innate immune cells such as basophils, dendritic cells, eosinophils, Langerhans cells, mast cells are the body's first line of defence.
