Which of the following is NOT posttranslational processing?
A. Joining 2 or more amino acid chains
B. Conversion of a pro-protein to a functional protein
C. Removal of introns from pre-mRNA
D. Adding polysaccharide side chains to proteins
E. Conversion of a pro-enzyme to a functional enzyme
Answer: C
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Pulmonary veins:
A) transport oxygenated blood to the lungs B) transport blood rich in carbon dioxide to the lungs C) transport oxygenated blood to the heart D) split off the pulmonary trunk E) return blood to the right atrium of the heart
What type of agranular leukocyte produces antibodies?
A) Helper T cells B) Natural Kill T cells C) B cells D) monocytes
The human immunodeficiency virus (HIV) is able to cause widespread immunodeficiency because ________.
A. the HIV virus blocks the activation of the complement system B. the HIV virus interferes with activation of both B cells and T cells C. the HIV virus infiltrates the cells responsible for innate immunity, the first line of defense against pathogens D. through infection of T cells, HIV prevents the product of antibodies against the virus
An example of transamination is
A) finding a brand new sports car in your driveway with your name on it. B) removing a phosphate group from a molecule. C) removing an amino group and putting it into the bloodstream for the kidneys to discard. D) removing an amine group from one molecule and binding it to a different molecule.