MCAT review test 1 Biological and biochemical systems

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The administration of insulin to a patient with diabetic ketoacidosis will have the most direct effect on which of the following reactions?

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Breakdown of adipose triglycerides

Based on the description in the passage, the biochemical process which gives rise to diabetic ketoacidosis in the context of severe insulin deficiency is ketogenesis following the breakdown of triglycerides in adipose tissue, release of free fatty acids into the blood, and subsequent β-oxidation of those free fatty acids. Thus the most direct effect of the administration of insulin would be to reduce the breakdown of adipose triglycerides

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Terms in this set (31)

The administration of insulin to a patient with diabetic ketoacidosis will have the most direct effect on which of the following reactions?

Based on the results presented in Table 1, which of the following statements is correct?

Increased serum urea nitrogen is associated with increased risk of cerebral edema because the lower bound of the confidence interval is greater than 1

This question was mainly whether or not I understood the graph. This can be confusing if never seen a graph related to the one tested.

Based on information presented in the passage, which of the following mechanisms is LEAST likely to be effective in treating cerebral edema in patients with diabetic ketoacidosis?

Increasing cellular electrolyte uptake in central nervous system neurons

this question is looking at which treatment would help the least in clearing edema, which means which one would make the situation worst. Not which would make it better

After the organic extraction, RNAase would be found in the

organic phase.

The passage says that the organic extraction leaves the plasmid in the aqueous layer, and proteins and buffer components in the organic phase. Since RNAase is an enzyme, it would be found in the organic phase (choice C is wrong and choice D is correct).

Which of the following is a true statement about RNAase?

It contains peptide bonds and is degraded non-specifically in strong acid conditions.

RNAase is an enzyme that degrades RNA by breaking the phosphodiester bonds in the RNA backbone. Enzymes are proteins and are therefore made of amino acids connected by a covalent peptide bond. Proteins are degraded specifically by proteases and nonspecifically in strong acid conditions or extreme temperatures