BCH4024 070125 OC Su25 E2 Q24: Porphyria is an inherited condition that results in the failure to produce sufficient levels of porphyrins (see structure). The failure to produce porphyrins has a significant impact on which of the following? 

BCH4024 070125 OC Su25 E2 Q7:  You have determined the primary sequence of a protein with the following characteristics. Amino acids 1-10: (1) Leucine, (2) Threonine, (3) Valine, (4) Alanine, (5) Histidine, (6) Arginine, (7) Arginine, (8) Leucine, (9) Lysine, (10) Lysine Amino acids 11-33 are primarily leucine, tryptophan, phenylalanine, and alanine Amino acids 34-60 are primarily glutamate, aspartate, alanine, and serine Based on the primary sequence, which of the following predictions is likely CORRECT?

BCH4024 070125 OC Su25 E2 Q35:  Which choice (A — E) for filling in the blanks makes a TRUE statement? Binding of the hormone X_ to its receptor on liver cells leads to the activation of the enzyme Y_, which is involved in the conversion of glucose-6-phosphate to glycogen.          X                                                  Y insulin                            glycogen synthase glucagon                       glycogen phosphorylase epinephrine                       hexokinase leptin                             glycogen synthase acetylcholine                 glycogen phosphorylase

BCH4024 070125 OC Su25 E2 Q26: A 6 month-old female presents with hypotonia, developmental delay, and lactic acidosis. Lab tests show elevated levels of citrate and decreased levels of isocitrate. You suspect a problem with the citric acid cycle and think she MOST likely has a deficiency of:

BCH4024 070125 OC Su25 E2 Q49: When insulin acts as growth factor, which molecule directly facilitates the exchange of GDP for GTP on Ras and what type of a molecule is it?

BCH4024 070125 OC Su25 E2 Q34: A patient complains of fatigue and muscle cramps during exercise. A muscle biopsy indicates a deficiency in the enzyme that catalyzes the following reaction: What is the enzyme and why does deficiency of this enzyme lead to muscle cramps?

BCH4024 070125 OC Su25 E2 Q5: Which residue is NOT expected to have a positive hydropathy index value? 

BCH4024 070125 OC Su25 E2 Q10:  Which term below is NOT correctly matched with its description?   Term Description a. ABC Transporter: Large superfamily of membrane transport     proteins that use the energy of ATP hydrolysis to transfer molecules across membranes. b. Multidrug resistance protein Type of ABC transporter protein that can pump drugs out of the cytoplasm of eukaryotic cells. c. Antiporter Carrier protein that transports two types of solute across the membrane in the same direction. d. Uniporter Carrier protein that transports 1 type of solute across the membrane. e. P-Type ATPase Carrier protein with a N, P, and A domain  

BCH4024 070125 OC Su25 E2 Q4: What does the “fluid” in the fluid mosaic model refer to?

BCH4024 070125 OC Su25 E2 Q14: Some aboriginal people use the compound tubocurarine to apply to their poison arrows to paralyze their prey animals. When a prey animal is struck with one of these poison arrows, the acetylcholine receptor is blocked in its closed configuration. Acetylcholine is a neurotransmitter that binds to the acetylcholine receptor. The receptors function as ligand-gated ion channels, mediating rapid response like muscle contraction.  What is the mechanism for paralysis by tubocurarine?