Metabolism — Flashcards

Flashcard 951: What proteins (2) have decreased activity due to vitamin K deficiency? _____

Answer: Protein C and protein S

Flashcard 952: Each alpha- and beta-tubulin heterodimer of a microtubule has 2 _____ bound.

Answer: GTP

Extra: Alpha-tubulin binds GTP permanently (non-exchangeable), while beta-tubulin binds GTP reversibly and can hydrolyze it to GDP (exchangeable).

Flashcard 953: Vitamin E primarily functions as an _____; protects RBCs and membranes from free radical damage

Answer: antioxidant

Flashcard 954: What part of the cell is the site of steroid synthesis and detoxification of drugs and poisons?_____

Answer: Smooth endoplasmic reticulum

Flashcard 955: What do the carrier molecules CoA and lipoamide carry in their activated forms? _____

Answer: Acyl groups

Flashcard 956: Flavin nucleotides (FAD+) come from Vitamin _____

Answer: B2

Flashcard 957: Which glycogen storage disorder is associated with severe fasting hypoglycemia? _____

Answer: Von Gierke disease

Flashcard 958: What is the coenzyme (active) form of vitamin B6? _____

Answer: Pyridoxal phosphate (PLP)

Flashcard 959: The _____ subunits of the insulin receptor are connected to the alpha subunit by a disulfide bond and span the cell membrane

Answer: beta

Flashcard 960: After oxaloacetate has been formed from pyruvate (gluconeogenesis), it may exit the mitochondria and enter the cytosol via the _____ shuttle

Answer: malate