UNE BIOCHEMISTRY EXAMS WITH CORRECT ANSWERS COMPILED

Changes in the physiological variables listed below can alter the affinity of hemoglobin for oxygen. Which of the following will lower the affinity of hemoglobin for oxygen? A) Decrease in protons B) Increase in 2, 3 bisphosphoglycerate (BPG) C) Increase in ph D) Decrease in CO2 - Increase in...

Ribose and NADPH - A family presents for genetic counseling. The couple has two female children who are alive and well; however, their infant son recently died in the nursery with severe hemolysis (lysis of red blood cells) and jaundice. The wife recalls she lost a brother in infancy with severe he...

Succinate is a substrate for which complex in the electron transport chain? A.) Complex 1 (NADH-1 oxidoreductase) B.) Complex IV (Cyt c oxidase) C.) Complex V (ATP synthase) D.) Complex II (Succinate-Q reductase) - Complex II (succinate-Q reductase) (D) Which of the following would b...

Under fasting conditions (ratio of insulin: glucagon <1), elevated glucagon will activate which of the following enzymes? - hormone sensitive lipase Ketonuria, hypoglycemia, and severe acidosis are prime diagnostic indicators of the presentation of type 1 diabetic ketoacidosis. Which of the f...

What percentage of water is in the body? - 60% Relationship between protons and acids & bases - Acids donate proton. Bases accept proton Strong Acids Vs Weak Acids - Strong acids fully dissociate (100%) and weak acids partially dissociate Properties of water - dipole dipole Polar H bo...

The cellular uptake of LDL increase intracellular cholesterol levels. This has which of the following impacts on de novo cholesterol synthesis? - Increases degradation of HMG-coa reductase Dietary cholesterol is primarily transported in the body by which of the following lipoproteins? - Chylomicr...

Short chain fatty acids and medium chain fatty acids enter mitochondria by: - Diffusion Under fasting conditions (ratio of insulin to glucagon <1), elevated glucagon will activate which of the following enzymes? - Hormone sensitive lipase The process of ketogenesis refers to the conversio...

Succinate is a substrate for which complex in the electron transport chain? A.) Complex 1 (NADH-1 oxidoreductase) B.) Complex IV (Cyt c oxidase) C.) Complex V (ATP synthase) D.) Complex II (Succinate-Q reductase) - Complex II (succinate-Q reductase) (D) Which of the following would b...

In glycolysis, ____ is considered the committed step in the pathway. - PFK-1 Phospholipids are made up of one or more fatty acids, a core, a phosphate, and which one of the following? - alcohol Cholesterol has a unique chemical structure with four fused rings that allows it to serve what cri...

Glycogen is stored primarily in the: - liver and skeletal muscles Pathway for synthesis and degradation are identical. True or False - True Enzymes used for Glycogen synthesis - Phosphoglucomutase, udpglc pyrophosphorylase, and Glycogen synthase Glycogen synthesis - udpglc pyrophosphoryl...

How do most enzymes reduce the activation energy needed to move a reaction forward? - Providing an active site most complementary the transition state An enzyme has a mutation within the substrate binding of the coenzyme needed for covalent catalysis. Which of the following is likely to result a...

If unregulated, which of the following pairs of enzymes would represent a futile cycle? - Fructose 1, 6 bisphosphatase and phosphofructokinase-1 Rotenone blocks complex 1 in the ETC. This increases levels of NADH and would likely impair the function of which of the following enzymes? - Pyruvate...

A 19-year-old boy is diagnosed with Creutzfeldt-Jakob disease which is caused by the introduction of an amyloid fold in the disease-causing protein. The introduction of this fold causes the protein to transition from a primarily alpha helical structure to an aggregate of mostly beta sheets. This cha...

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