Tag: CELL SIGNALING

26. The second messenger CAMP, synthesized by adenylyl cyclase transduces a wide variety of physiological signals in various cell types in mammalian cells. Most of the diverse effects of cAMP […]

25. In signal transduction trimeric G protein with α,β and γis involved. Which subunit will activate adenylate cylase (1) α subunit        (2) β subunit (3) γ  subunit       (4) All three […]

24. C-AMP is directly involved in regulation of (1) Adenylate cyclase (2) Protein kinase A (3) Phosphofrucotokinase (4) ATP Cyclic AMP (cAMP) and Its Role in Cellular Regulation Introduction Cyclic […]

23. Vibrio cholrae causes diahorrea by (1) Closing ion channels (2) Constitutive expression of adenylate cyclase (3) Closing absorption of water from gut epithelium (4) Destroys cells of intestinal lining […]

22. The mode of action of cholera toxin in causing diarrhoea is by: (1) inactivating Gi protein. (2) continuousactivation of adenylyl cyclase. (3) locking GS protein in an inactive state. […]

21. In small intestine, cholera toxin acts by (1) active absorption of NaCl (2) activation of GTPase (3) inhibition of adenylyl cyclase (4) ADP-ribosylation of the G-protein Introduction Cholera toxin, […]

In the above signaling cascade, which of the following molecules is denote by ‘B’? (1) single-pass.      (2) three-pass (3) five-pass.         (4) Seven-pass. Understanding the Structure of Cellular Receptors: Identifying ‘B’ […]

  (JUNE 2019) 12- Following are the list of some cellular receptors (Column X) and With possible functional characteristics (Column Y): Column X Column Y A. Asialoglyco protein receptor (i) […]

The table below summarizes the key signaling pathways that orchestrate development, their receptors, transcription effectors and output. SIGNALING PATHWAY RECEPTOR TRANSCRIPTIONAL EFFECTOR OUTPUT A Wnt Thick veins β-catenin Patterning B […]

Which one of the following combinations is the correct pairing of ligands with their receptors? (i) FGF (a) Patched (ii) Hedgehog (b) Frizzled (iii) Wnt (c) Receptor tyrosine kinase (1) […]