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In general, amino acids are chiral molecules that act as building blocks for proteins. In addition, amino acids and amino acid derivative can act as extracellular messenger molecules such as hormones or neurotransmitters. a. How many different amino acids can be incorporated into proteins during translation? b. Do ribosomes use L or D amino acids for protein synthesis?

One small box on ECG graph paper equals:    

Select all that apply. All cells have:

Spontaneous processes are characterized by a change in Gibbs free energy that is  positive

At a pH above its pKa, the phenolic group of tyrosine is _____.

Zwitterions are _____.

Which of the following glands can be palpated during the extraoral examination by the dental hygienist?

Which of the following lesions is due to an enlarged thyroid gland?

The following equation is an example of a ________ reaction. Ca + 2HCl → H2 + CaCl2

If , what is the steady state (final) value  of ?