Podcast
Questions and Answers
What role do cobalamins play in the synthesis of succinic acid and methionine?
What role do cobalamins play in the synthesis of succinic acid and methionine?
- Facilitate the transfer of monocarbon groups (correct)
- Act as carriers for propionic acid
- Inactivate enzymes for homocysteine synthesis
- Prevent the regeneration of tetrahydrofolic acid
What technique is currently used to determine serum vitamin B12 concentration?
What technique is currently used to determine serum vitamin B12 concentration?
- Chemiluminescence immunoassays (correct)
- Manual systems
- Microbiological assays
- Radioisotopic assays
When can a deficiency in serum vitamin B12 be considered based on laboratory standards?
When can a deficiency in serum vitamin B12 be considered based on laboratory standards?
- When the level is less than 200 pg/mL (correct)
- When the level exceeds 1000 pg/mL
- When the level is between 200-400 pg/mL
- When the level is over 500 pg/mL
What is the consequence of a chronic deficiency of vitamin B12?
What is the consequence of a chronic deficiency of vitamin B12?
What is the role of Intrinsic Factor autoantibodies in vitamin B12 absorption?
What is the role of Intrinsic Factor autoantibodies in vitamin B12 absorption?
How does a deficiency in vitamin B12 affect DNA synthesis?
How does a deficiency in vitamin B12 affect DNA synthesis?
Which condition may arise if there is a deficiency in methionine synthesis due to lack of vitamin B12?
Which condition may arise if there is a deficiency in methionine synthesis due to lack of vitamin B12?
What is the role of transcobalamin 2 in the transport of vitamin B12?
What is the role of transcobalamin 2 in the transport of vitamin B12?
Which vitamin B12 carrier protein is primarily responsible for transporting B12 to reserve organs like the liver?
Which vitamin B12 carrier protein is primarily responsible for transporting B12 to reserve organs like the liver?
What is a characteristic of the total reserves of vitamin B12 in the body?
What is a characteristic of the total reserves of vitamin B12 in the body?
In which situations would there be an increased need for vitamin B12 consumption according to the text?
In which situations would there be an increased need for vitamin B12 consumption according to the text?
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