The anatomical structure identified with the
letter "D" in the figure above is the
a. myocardium.
b. pulmonary veins.
c. inferior vena cava.
d. right atrium.
e. heart apex
D
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Would a denatured antigen be expected to have the same epitopes as its native (non-denatured) counterpart? Why?
A. Yes-epitopes are just a sequence of amino acids in a row, so they do not change regardless of 3D shape of the protein molecule they lie within. B. No-ALL epitopes are dependent on being in the proper original 3D conformation in the protein they arise within. Denaturing them would destroy them by destroying that conformation. C. Yes AND No-SOME epitopes are dependent on 3D conformation (conformational epitopes), while some simply depend on the sequence of amino acids (linear epitopes). So, really, it depends on the particular epitope.
During the initiation of translation, the small ribosomal subunit binds mRNA, and then the initiator tRNA base-pairs with mRNA. Which step happens next?
a. The ribosome catalyzes the formation of the first peptide bond. b. The first tRNA is released. c. The large ribosomal subunit joins the small subunit. d. The ribosome starts the assembly of the amino acid chain. e. The second tRNA base-pairs with the mRNA.
Identify the hydrophobic side chain of chlorophyll in the figure above
a. 5 with 3 b. 5 with 4 c. 5, regardless of the R group d. 6 e. 7
Both fermentation and aerobic respiration begin with ________
a. electron transfer from NADH to pyruvate b. the Krebs cycle c. an electron transfer chain d. glycolysis