Specify the type of carbon unit that is transferred in one-carbon metabolism by each of the following molecules: 5 10 a. N , N -methylene THF b. serine c. choline d. S-adenosylmethionine
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Specify the type of carbon unit that is transferred in one-carbon
following molecules:
5 10
a. N , N -methylene THF
b. serine
c. choline
d. S-adenosylmethionine
Step by step
Solved in 2 steps
- If glucose labeled with 14C in C-1 is metabolized to ethanol and CO2 via fermentation, which carbon will contain 14C in: a. The CO2 b. the carbon atom carrying the OH of ethanol c. the carbonyl carbon atom of ethanol d. the methyl carbon atom of ethanolWhich enzyme is responsible for the cyclization of a glutamate derivative forming a proline precursor? A、AIR synthetase B、semialdehyde cyclase C、No enzyme is required D、IMP synthaseWhat specific reaction cannot occur due to the presence of cyanide? A.Transfer of electrons to co-enzymes B.Inability to strip a carbon from pyruvate C.Transfer of electrons to and between carrier proteins D.Addition of a phosphate onto ADP to make ATP
- Which of the following describes a purpose for the function of phosphoglucoisomerase? a) allows for phosphorylation for trapping the molecule in the cell b)promotes substrate level phosphorylation and formation of ATP c) allows formation of a primary alcohol necessary for the next step of phosphorylation d)facilitates epimerization, the change in stereochemistry at one chiral carbonE n e r g y is released by the ________ of ATP. a. removal of the terminal phosphate group b. addition of an electron c. oxidative cleavage of the hydroxyl groupWhat’s the role of biotin in fatty acid synthesis (you may choose more than one answer) A. A nucleophile that directly attack carbon dioxide B. A base that deprotonates acetyl CoA C. A temporary carrier of carbon dioxide
- Chemotrophic energy metabolism is a catabolic and exergonic process that produces ATP from oxidizing molecules. Which among the following is not an energy source of chemotrophic energy metabolism? A. Iron B. Photons C. Carbohydrates D. ProteinsCyanide makes a bond to cytochrome in the electron transport chain located in the mitochondria, rendering the electron transport chain useless. The cyanide ingestion in death due to which of the following? a) Starvation, due to an inability to create glucose.b) Build up of lactic acid.c) Inability to take in oxygen through the lungs.d) Cellular death from lack of energy.Lactose--->galactose+glucose represents an enzymatic reaction. What statement about this reaction is true? A) lactose is the enzyme of this reacrion B) galactose is the substance of this reaction C) this reaction is a type of exchange reaction D) this reaction is a type of decomposition (catabolic) reaction
- Which of the following is an important end product of disassembly of fatty acids? answer choices A.) DNA gyrase B.) Pyruvate C.) Acetyl CoA D.) Succinate dehydrogenaseWhich of the following condenses with oxaloacetate to form citrate? A) carboxybiotin B) cis-aconitate C) acetyl-CoA D) oxalosuccinate E) succinyl-phosphateThe compound that enters the Krebs cycle isa. citric acid b. oxaloacetic acid c. pyruvic acid d. acetyl coenzyme A
