Midterm

An educational illustration showing biochemistry concepts, including enzymes, hemoglobin structure, and metabolic pathways in vibrant colors.

Biochemistry Midterm Quiz

Test your knowledge of biochemistry concepts with our engaging midterm quiz! Dive into crucial topics such as enzyme kinetics, hemoglobin function, and metabolic pathways.

Each question is multiple-choice, challenging you to apply your understanding:

Assess your grasp on enzyme activity and regulation.
Evaluate factors affecting oxygen binding to hemoglobin.
Explore metabolic processes and their integration.

24 Questions6 MinutesCreated by RunningCell352

In enzyme kinetics Km implies:

The substrate concentration that gives half Vmax

The dissociation constant for the enzyme substrate complex

Concentration of enzyme

2,3-bisphosphoglycerate in low concentrations, combine with hemoglobin, causes:

Displacement of the oxyhemoglobin dissociates curve to the right

Displacement of the oxyhemoglobin dissociates curve to the left

No change in oxyhemoglobin dissociates curve

Which of the following statements about hemoglobin is correct?

2,3-bisphosphoglycerate (BPG) increases the infinity of hemoglobin for oxygen

Deaoxygenated hemoglobin has a higher binding affinity for protons than has oxyhemoglobin

Hemoglobin has a higher affinity for oxygen than does myoglobin

Which of the following statements about the Bohr effect is true?

Lowering the pH shifts the oxygen dissociation curve of hemoglobin to the right (lower affinity)

The affinity of hemoglobin for o2 is improved by high concentration of Co2

In the lungs, the presence of higher concentration of o2 promotes the binding of CO2 and H+

Glucongenesis is:

The formation of glycogen

Breakdown of glucose to pyruvate

Breakdown of glycogen to glucose

Synthesis of glucose from non-carbohydrate precursors

Which of the following is not a stage of acrobic respiration:

Glycolysis

Pyruvate oxidation

Electron transport chain

Hexokinase activity in glycolysis is inhibited by:

Glucose-6-phosphate

Fructose-6-phosphate

Fructose-1,6-biphosphate

Circle all statements that are true:

Fatty acids cannot be used by RBC’s

Excess of carbohydrate and protein obtained through diet cannot be converted to fatty acids

Creatinine shuffles fatty acids into the mitochondrial matrix

Low calorie and high fat diet ….. Fatty acid ….

Which of the following statements about fatty acids is correct:

Fatty acids are used as fuel molecules by all cells in human body

Fatty acids are oxidized to acetyl CoA

Fatty acids are converted to glucose in the liver

Which of the following best explains why statin therapy is effective for individuals with hypercholesterolemia:

Statins inhibit HMG-CoA reductase, a key regulator of cholesterol synthesis

Statins inhibit HMG-CoA synthase, a key step for synthesis of mevalonate that inhibits fatty acid synthesis

Which of the following statements regarding TCA cycle is true?

It is an anaerobic process

It occurs in cytosol

It contains no intermediates for gluconeogenisis

It is ampbibolic in nature

The acetyl CoA formed on B-oxidation of all long chain fatty acids is….

CO2 and water

Cholesterol

Fatty acids

Ketone bodies

Midterm

Biochemistry Midterm Quiz

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