MDS PREP
Tumours which involve the tip of the tongue may metastasise to the
1) Submandibular nodes
2) Submental nodes
3) Jugulodigastric nodes
4) Jugulo-omohyoid nodes
Oral medicine
Answer: 2
Glutamate-pyruvate trans-aminase is predominantly present In:
1. Skeletal muscle
2. Cardiac muscle
3. Brain
4. Liver
Biochemistry
Answer: 4
Glutamate-pyruvate trans-aminase is predominantly present In Liver
All are true for home bleaching, except
1. Uses 15% carbamide peroxide
2. In addition to bleaching agent carbapol is used
3. Vaccum from vinyl trays is used
4. Both arches bleached simultaneously
Endodontics
Answer: 2
What is the primary mechanism of the fight-or-flight response in the regulation of glycogenolysis?
1) Activation of glycogen phosphorylase by epinephrine
2) Inhibition of glycogen synthase by cortisol
3) Stimulation of glucose-6-phosphatase by thyroid hormones
4) Activation of hexokinase by norepinephrine
Answer: 1) Activation of glycogen phosphorylase by epinephrineExplanation: Epinephrine acts on the beta-adrenergic receptors of liver and muscle cells, which activate protein kinase. This kinase then phosphorylates and activates glycogen phosphorylase, an enzyme that breaks down glycogen into glucose-1-phosphate, which is rapidly converted to glucose-6-phosphate for use in glycolysis or for release into the bloodstream to maintain glucose levels during stress.