Which one of the following statements is INCORRECT? Question 9Select one:a.The regulatory units of PKA bind cyclic AMP and are released from the PKA complex to phosphorylate downstream signalling molecules.b.Protein kinase A (PKA) contains regulatory and catalytic sub-units.c.Peptide hormones cannot diffuse through the cell membrane.d.Heat shock proteins are chaperone molecules that complex with cytoplasmic steroid hormone receptors.   e.Steroid hormones are synthesised from cholesterol that is largely (80%) transported from the liver and enters target cells following Apo B-100 activation of LDL receptors.

Which one of the following endocrine system statements is INCORRECT?Question 19Select one:a.All cells produce Steroid hormones using cholesterol as a precursor molecule. b.Signal amplification is achieved through the use of second messenger signalling pathways and means that cells do not need to express a large amount of receptors for a hormone to cause a large effect in the cell. c.Chaperone molecules do not enter the nucleus of the cell. d.Agonists activate receptor signalling pathways within a cell. e.Up-regulation of receptors allows cells to enhance their sensitivity to a ligand.

Which one of the following statements is INCORRECT? Question 16Select one:a.Insulin stimulates the production of glycogen synthase enzyme, which favours glycogenesis in hepatocytes.b.Peptidase enzymes in the enterocyte cytoplasm degrade absorbed peptides into amino acids.c.Lipid storage ceases during fasting because there are minimal levels of insulin in the blood to synthesise lipoprotein lipase enzymed.The insulin receptor is a tyrosine kinase receptor that is comprised of 4 subunits: 2 membrane-spanning alpha subunits, and 2 insulin-binding beta subunits.e.Glucose enters the liver via the GLUT2 transporter, which is active regardless of the presence of insulin.

Which of the following statements about substrate-level phosphorylation is FALSE?Group of answer choicesIt involves the direct transfer of a high-energy phosphate group from an intermediate metabolic compound to ADP.It occurs in glycolysis.The oxidation of intermediate metabolic compounds releases energy that is used to generate ATP.It occurs in the Krebs cycle.No final electron acceptor is required.Next

Which of them have intracellular receptor ? (a) Peptide hormones(b) Steroid hormones(c) Iodothyroninesa & ba & ca, b & cb & c

Virtually all of the amino acid-based (water soluble) hormones exert their effects through intracellular ________.Question 9Select one:a.second messengersb.gene transcriptionc.nucleotidesd.osmosise.ions