Poisons like cyanide inhibit Na+ efflux and K+ influx during cellular transport. This inhibitory effect is reversed by an injection of ATP. This demonstrates that (a) ATP is the carrier protein in the transport system (b) energy for Na+-K+ exchange pump comes from ATP (c) ATP is hydrolysed by ATPase to release energy (d) Na+-K+ exchange pump operates in the cell.

Poisons like cyanide inhibit Na+ efflux and K+ influx
during cellular transport. This inhibitory effect is
reversed by an injection of ATP. This demonstrates
that
(a) ATP is the carrier protein in the transport system
(b) energy for Na+-K+ exchange pump comes from
ATP
(c) ATP is hydrolysed by ATPase to release energy
(d) Na+-K+ exchange pump operates in the cell.
by

1 Answer

Answer :

(b) energy for Na+-K+ exchange pump comes from
ATP
by

Related questions

There are two properties of the cell necessary to maintain nonequilibrium cellular composition; the first is selectivity and the second is energy conversion. Which of the following statement(s) is/are true concerning energy converting transport? a. The site of energy conversion and transport in the plasma membrane involves the phospholipid component b. The Na+-K++-ATPase derives energy from hydrolysis of extracellular ATP c. In some systems, energy inherent in the transmembrane ion gradient can be used to drive transport of a second species d. Examples of species transported via secondary active transport include hydrogen ions, calcium, amino acids and glucose

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Last Answer : Answer: c, d The selectivity of the plasma membrane, although impressive, cannot account for the nonequilibrium composition of living cells. A cell can be maintained in a nonequilibrium state only by ... to drive the transport of a second species such as protons, calcium, amino acids, or glucose

The most probable mechanism of anticonvulsant action of phenytoin is: A. Facilitation of GABAergic inhibitory transmission B. Hyperpolarization of neurones C. Interaction with Ca2+ channels to promote Ca2+ influx D. Prolongation of voltage sensitive neuronal Na+ channel inactivation

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Last Answer : D. Prolongation of voltage sensitive neuronal Na+ channel inactivation

Na+/K+-ATPase along with ATP requires (A) Ca (B) Mn (C) Mg (D) Cl

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Which one gives the most valid and recent explanation for stomatal movement? (a) Starch hydrolysis (b) Guard cell photosynthesis (c) Transpiration (d) Potassium influx and efflux

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Which one of the following statements is true regarding digestion and absorption of food in humans? (a) Fructose and amino acids are absorbed through intestinal mucosa with the help of carrier ions like Na+. (b) Chylomicrons are small lipoprotein particles that are transported from intestine into blood capillaries. (c) About 60% of starch is hydrolysed by salivary amylase in our mouth. (d) Oxyntic cells in our stomach secrete the proenzyme pepsinogen.

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he following is true of nifedipine except: A. It can aggravate urine voiding difficulty in elderly males with prostatic hypertrophy B. It promotes Na+ retention by a renal tubular action to cause ankle oedema as side effect C. It can inhibit insulin release from pancreas D. At high doses it can paradoxically increase the frequency of angina pectori

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Mammalian cells are not inhibited by low concentrations of tetracyclines that inhibit sensitive microorganisms because: A. Host cells lack active transport mechanism for tetracyclines B. Host cells actively pump out tetracyclines C. Protein synthesizing apparatus of host cells has low affinity for tetracyclines D. Both ‘A’ and ‘C’ are correct

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Pancuronium differs from tubocurarine in that: A. It is a depolarizing blocker B. Its action is not reversed by neostigmine C. It can cause rise in BP on rapid I.V. injection D. It causes marked histamine release

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The following are true about the synaptic potential: a. the Na+ and K+ currents occurs simultaneously b. is a graded potential c. the channel is ligand-gated d. the post-synaptic potential is inhibitory when depolarizing

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Carrier protein can (A) Transport only one substance (B) Transport more than one substance (C) Exchange one substance to another (D) Perform all of these functions

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The therapeutic effect of sulfasalazine in ulcerative colitis is exerted by: A. Inhibitory action of the unabsorbed drug on the abnormal colonic flora B. Breakdown of the drug in colon to release 5-aminosalicylic acid which suppresses inflammation locally C. Release of sulfapyridine having antibacterial property D. Systemic immunomodulatory action of the drug

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What is the role of NAD+ in cellular respiration? (a) It functions as an enzyme. (b) It functions as an electron carrier. (c) It is a nucleotide source for ATP synthesis. (d) It is the final electron acceptor for anaerobic respiration.

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What is the role of NAD+ in cellular respiration ? (1) It functions as an enzymes (2) It functions as an electron carrier (3) It is a nucleotide source for ATP synthesis (4) It is the final electron acceptor for anaerobic respiration

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The following diuretic acts on the luminal membrane of distal tubule and collecting ducts to inhibit electrogenic Na+ reabsorption so that K+ excretion is diminished and bicarbonate excretion is enhanced: A. Xipamide B. Isosorbide C. Triamterene D. Spironolactone

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The symptoms of allergen-mediated asthma result from which of the following? (a) Increased release of mediators from mast cells (b) Increased adrenergic responsiveness of the airways (c) Inceased vascular permeability of bronchial tissue (d) Decreased calcium influx into the mast cell (e) Decreased prostaglandin production

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Azides and cyanide inhibit: (a) Metaphase (b) Prophase (c) Anaphase (d) Telophase

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When the electrons pass from one carrier to another via complex-I to IV in the electron transport chain, they are coupled to ATP synthase (complex-V)

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Which process begins after Na influx essentially stops at its plateu a. Depolarization b. Repolarization c. both d. none

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Select the correct statement from the following regarding cell membrane (1) Fluid mosaic model of cell membrane was proposed by Singer and Nicolson (2) Na+ and K+ ions move across cell membrane by passive transport (3) Proteins make up 60 to 70% of the cell membrane (4) Lipids are arranged in a bilayer with polar heads towards the inner part

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The following are true about rods in darkness: a. there is tonic release of neurotransmitters b. the sodium ion channels are open c. the potassium ion channels are shut d. there is a net influx of sodium ions

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