Biochemical Pathways Quiz
Biochemical Pathways Quiz
Test your knowledge on essential biochemical pathways with this engaging quiz! Dive into topics such as protein degradation, the urea cycle, glycolysis, and more.
- Multiple-choice questions
- Covering various aspects of metabolism
- Perfect for students and enthusiasts alike
When high protein degradation occurs, excess of amino acids that are not used for anabolic reactions are:
Stored as glycogen for later use by liver
Degraded by liver and and then excreted by kidneys
Rapidly degraded to amphibolic intermediates
A,B and C are correct
Neither of the answers is correct
What is NOT true about transdeamination?
During transdeamination, removal of a ɑ-amino group is done by a coupled process of transamination and deamination
During transdeamination coupled process, transamination forms Glutamate in peripheral cells
During transdeamination coupled process, oxidative and non-oxidative deamination produce ammonia in peripheral cells
During the transdeamination coupled process, deamination of glutamate forms ammonia in liver
Which 6 amino acids participate in urea formation:
Ornithine, Citrulline, Aspartic acid, Argino succinic acid, Arginine and N-Acetyl Glutamate
Lysine, Citrulline, Aspartic acid, Argino succinic acid, Arginine and N-Acetyl Glutamate
Lysine, Pyridoxamine phosphate, Aspartic acid, Argino succinic acid, Arginine and N-Acetyl Glutamate
Serine, Threonin, Aspartic acid, Argino succinic acid, Arginine and N-Acetyl Glutamate
During detoxification of ammonia in the liver, 75% of the urea produced in the liver gets transported to the kidneys for excretion while 25% is transported to colon where it is then decomposed by urease back into ammonia.
True
False
Which steps of the urea cycle occur in mitochondria?
Formation of Argininosuccinate
Formation of Citrulline
Formation of Arginine
Formation of Carbamoyl phosphate
A and B are correct
B and D are correct
A and B are correct
Where does amino acid degradation occur in mammals?
The large intestine
The liver
Amino acid degradation does not occur in mammals, it only occurs in fish and birds.
The small intestine
The brain
In what form(s) is ammonia transported to the liver?
Glutamate, glutamine, and alanine
Glutamate, glutamine, and arginine
Glucose and glutamate
Glutamine and arginine
The removal of fumarate converts argininosuccinate into:
Alanine
Aspartate
Arginine
Citrulline
Lysine can participate in transamination, however, the Ʃ-amino group does not undergo transamination, only the 𝛼-amino group does.
True
False
During transamination, which coenzyme serves as the carrier of amino groups?
R5P
PLP
PCP
G6P
A type of covalent bond that joins a carbohydrate with another group is called?
Di-polar bond
Glycosidic bond
Electrosteric bond
Carboxylic bond
Which of the following polysaccharides is stored in the liver and the muscles?
Glycogen
Chitin
Saccharin
Starches
Cellulose
Which of the following is NOT one of the elements that make up carbohydrates?
Carbon
Hydrogen
Nitrogen
Oxygen
None of the above
How does the human body store excess carbohydrates?
Blood
Muscle
Fat
Bone
Skin
---------------are molecules that have the same molecular formula and constitution, but differ in their 3D orientations of their atoms in space.
Constitutional isomers
Enantiomers
Stereoisomers
Ketoses
None of the above
Which of the following describes the relationship between the straight chain forms of D-glucose and D-galactose, given that they are non-cyclic molecules that differ only in stereochemical configuration at the fourth carbon?
They are meso-compounds
They are epimers
They are anomers
They are enantiomers
What is the chemical formula for glycolysis?
Glucose+2ATP--->1Pyruvate+3ATP+1NADH
Glucose+2ATP---->2Pyruvate+4ATP+2NADH
Glucose +4ATP---->2Pyruvate+2ATP+2NADH
Glucose +2ATP--->4Pyruvate+4ATP+4NADH
The sequence of reactions in Glycolysis is also known as the Embden-Meyerhof pathway?
True
False
Glucose has _____ phases?
2
4
3
1
Where is glycolysis typically carried out?
The cytosol
Mitochondria
Golgi Apparatus
Nucleus
It is possible for glycolysis to function either aerobically or anaerobically.
True
False
Glucose 6-phosphate is an important compound to which of the following metabolic pathways?
Glycolysis
Gluconeogenesis
Pentose Phosphate Pathway
All of the above
Which of the following is an inhibitor of glycolysis?
Fluoride
Oxamate
Bromohydroxyacetone phosphate
All of the above
What is the function of glucokinase in the liver?
Phosphorylate glucose
Remove glucose from blood after a meal
Assist in the catabolic pathways
Inhibits glycolysis
What is NOT one of the 3 enzymes in the Pyruvate Dehydrogenase complex?
Dihydrolipoyl dehydrogenase
Dihydrolipoyl transacetylase
Pyruvate Dehydrogenase
Thiamine Pyrophosphate
What does pyruvate dehydrogenase complex produce?
NADH & FAD+
Acetyl CoA & NAD+
NADH & Acetyl CoA.
FAD+& NAD+
What is the final product of the Krebs Cycle?
Acetyl-CoA
Acetate
Citric acid
Oxaloacetic acid
PDH can be regulated by end product inhibition, phosphorylation, and dephosphorylation.
True
False
How many molecules of reduced electron carriers are formed during the conversion of citrate to oxaloacetate?
1
2
3
4
In oxidative phosphorylation, which of the following molecules release electrons to the electron transport chain?
NAD+, FAD
NAD+, FAD, ADP
NADH, FADH2
NADH, FADH2, ATP
Malate is converted to oxaloacetate by malate dehydrogenase, a reaction requiring NAD+. Although the equilibrium of this reaction STRONGLY favors malate, why is the net flux to oxaloacetate?
The continual reoxidation of NADH
The continuous removal of oxaloacetate to form citrate
The requirement of NAD+
Only A & B
All of the above
What is oxygen (O2) ultimately reduced to when it is with electrons?
Peroxide
Water
Ozone
Hydrogen
When electrons flow along a gradient, which direction would they move in?
Two directions between a lower reducing potential and a higher reducing potential.
One direction from a lower reducing potential to a higher reducing potential.
One direction from a higher reducing potential to a lower reducing potential.
Two directions between a higher reducing potential and a lower reducing potential.
Which singular component within the electron transport chain is the only one that can interact with O2?
Cytochrome A3
Cytochrome B
Cytochrome C1
Cytochrome A
Complex I is one of the two entry points for NADH to enter the electron transport chain.
True
False
Which of the following inhibitors can bond to cytochrome C oxidase and prevent the transport of electrons to oxygen?
Cyanide
Antimycin A
Carbon monoxide
More than one of these inhibitors would bond with cytochrome C oxidase
What serves as a major link between carbohydrate metabolism and lipid metabolism
The Embden-Meyerhof Pathway
Phosphofructokinase
Glycerol-3-phosphate
Cytochrome A3
Intra- and Inter-chain hydrogen bonds along with Van der Waals interactions form crystaline bundles called?
Microfibrils
Protofibrils
Fibers
All of the above
None of the above
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