Description : Strychnine produces convulsions by: A. Stimulating NMDA receptors B. Facilitating the excitatory transmitter glutamate C. Blocking the inhibitory transmitter GABA D. Blocking the inhibitory transmitter glycine
Last Answer : D. Blocking the inhibitory transmitter glycine
Description : Phenylephrine (a) Mimics the transmitter at post-synaptic receptors (b) Displaces transmitter from axonal terminal (c) Inhibits synthesis of transmitter (d) None of the above
Last Answer : Ans: A
Description : Abnormal chain of amino acids in sickle cell anaemia is (A) Alpha chain (B) Beta chain (C) Delta chain (D) Gama chain
Last Answer : Answer : B
Description : Infant i le convu ls ions due to lesser formation of gamma amino butyric acid from glutamic acid is seen in the deficiency of (A) Glutamate-dehydrogenase (B) Pyridoxine (C) Folic acid (D) Thiamin
Description : Non-Protein amino acids are (A) Ornithine (B) β-alanine (C) γ-amino butyric acid (D) All of these
Last Answer : Answer : A
Description : In urea synthesis, the amino acid functioning solely as an enzyme activator: (A) N-acetyl glutamate(B) Ornithine (C) Citrulline (D) Arginine
Description : Abnormal chain of amino acids in sickle cells anaemia is (A) Alpha chain (B) Beta chain (C) Gama chain (D) Delta chain
Description : “Rancidity produced in butter can be decreased by adding quinoline to the butter”. This statements shows that --------? A. Nothing is impossible B. Quinoline is an inhibitor (Answer) C. Quinoline is a catalyst D. Quinoline is an activator
Last Answer : B. Quinoline is an inhibitor (Answer)
Description : A. It is a clonidine congener used in spasticity due to stroke or spinal injury B. It reduces muscle tone by activating GABAB receptors C. It inhibits release of excitatory amino-acids in spinal interneurones D. It reduces muscle spasms without producing weaknes
Last Answer : B. It reduces muscle tone by activating GABAB receptors
Description : The following are neurotransmitters at the autonomic post-ganglionic nerve endings: a. GABA b. noradrenaline c. acetylcholine d. 5 HT
Last Answer : acetylcholine
Description : In beri beri there will be accumulation of _________ in blood. (A) Aceto acetic acid (B) β−hydroxy butyric acid (C) Pyruvic acid (D) Methyl malonic acid
Last Answer : Answer : C
Description : In beri beri there will be accumulation of _______ in blood. (A) Aceto acetic acid (B) β-OH butyric acid (C) Pyruvic acid (D) Methyl malonic acid
Description : Acetoacetic acid and β-OH butyric acid are formed as (A) Kidneys (B) Heart (C) Liver (D) Intestine
Description : All the following saturated fatty acids are present in buffer except (A) Butyric acid (B) Capryllic acid (C) Caproic acid (D) Capric acid
Description : Which of the following are classified as essential fatty acids? (A) Arachidonic acid (B) Oleic acid (C) Acetic acid (D) Butyric acid
Description : An example of a hydroxy fatty acid is (A) Ricinoleic acid (B) Crotonic acid (C) Butyric acid (D) Oleic acid
Description : Pyruvic acid can be obtained by transamination of alanine with (A) α- keto glutaric acid (B) Acetoacetic acid (C) β−OH butyric acid (D) Phosphoenol Pyruvic acid
Description : What is Post Synaptic Neuron ?
Last Answer : Parts of two neurons combine to form synapses. The neuron that participates in the formation of the axon synapse is called the presynaptic neuron. The other neurons that make up synapses are called post synaptic neurons.
Description : 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
Last Answer : the Na+ and K+ currents occurs simultaneously
Description : Receptor sites for neurotransmitters are present on (a) pre-synaptic membrane (b) tips of axons (c) post-synaptic membrane (d) membranes of synaptic vesicles.
Last Answer : (c) post-synaptic membrane
Description : Receptor sites for neurotransmitters are present on : (1) Pre-synaptic membrane (2) Tips of axons (3) Post-synaptic membrane (4) Membrane of synaptic vesicles
Last Answer : (3) Post-synaptic membrane
Description : The mode of action of Isoproturon is a). Root inhibitor b). Shoot inhibitor c). Photosynthesis inhibition d). Amino acid inhibition
Last Answer : c). Photosynthesis inhibition
Description : The mode of action of dinitroanilines a). Shoot growth inhibitor b). Lipid inhibitor c). Root growth inhibitor d). Amino acid inhibitor
Last Answer : c). Root growth inhibitor
Description : Which herbicide is amino acid synthesis inhibitor a). Glyphosate b). 2,4-D c). MCPA d).Atrazine
Last Answer : a). Glyphosate
Description : What is the mode of action of sulfonamide herbicide a). Amino acid synthesis inhibitor b). Photosynthesis inhibitor c). Lipid inhibitor d). Pigment inhibitor
Last Answer : a). Amino acid synthesis inhibitor
Description : Pyridoxine deficiency may lead to convulsions as it is needed for the synthesis of (A) GABA (B) PABA (C) EFA (D) SAM
Description : Pyridoxin deficiency may lead to convulsions as it is needed for the synthesis of (A) GABA (B) PABA (C) EFA (D) SAM
Description : Alzheimer’s disease in humans is associated with the deficiency of (a) glutamic acid (b) acetylcholine (c) gamma aminobutyric acid (GABA) (d) dopamine.
Last Answer : b) acetylcholine
Description : Why can cardiac muscle fibres contract for longer periods than skeletal fibres? (a) Cardiac muscle is self-excitatory (b) Extracellular calcium partially controls the strength (and length) ... tubules are more developed in cardiac muscle (d) Cardiac muscle is uninucleate rather than multinucleate
Last Answer : Ans:(a)
Description : The axons of the Purkinje cells in the cerebellar cortex: a. terminate in excitatory synapses b. terminate in cerebellar nuclei c. terminate in the spinal cord. d. form the main efferent pathway from the cerebellar cortex
Last Answer : terminate in cerebellar nuclei
Description : The following is true of pethidine except: A. At equianalgesic doses it causes less respiratory depression than morphine B. It is less constipating than morphine C. It is a poor antitussive D. In overdose it often produces excitatory effect
Last Answer : A. At equianalgesic doses it causes less respiratory depression than morph
Description : The dopamine D2 receptor has the following feature: A. It is excitatory in nature B. It is negatively coupled to adenyl cyclase C. It is selectively blocked by bromocriptine D. It is not blocked by metoclopramide
Last Answer : B. It is negatively coupled to adenyl cyclase
Description : The synaptic pre-ganglionic neurons have their cell bodies in the lateral horn of the grey matter of the (a) Thoracic segment only (b) Lumbar segment only (c) Both (a) and (b) (d) None of the above
Last Answer : Ans: C
Description : Match the following cell structure with its characteristic feature. (A) Tight junctions (i) Cement neighbouring cells together to form sheet (B) Adhering junctions (ii) Transmit information through chemical to another cells (C) Gap ... iii) (c) (iii) (i) (iv) (ii) (d) (iv) (iii) (i) (ii)
Last Answer : (c) (iii) (i) (iv) (ii)
Description : The first protein synthesized by recombinant DNA technology was (A) Streptokinase (B) Human growth hormone (C) Tissue plasminogen activator (D) Human insulin
Last Answer : Answer : D
Description : Lactose or its analogues act as positive regulators of lac operon by (A) Attaching to i gene and preventing its expression (B) Increasing the synthesis of catabolite gene activator protein (C) ... holoenzyme (D) Binding to repressor subunits so that the repressor cannot attach to the operator locus
Description : Binding of RNA polymerase holoenzyme to the promoter region of lac operon is facilitated by (A) Catabolite gene activator protein (CAP) (B) cAMP (C) CAP-cAMP complex (D) None of these
Description : The enzymes encoded by z, y and a genes of lac operon are inducible, and their inducer is (A) Lactose (B) Allo-lactose (C) Catabolite gene activator protein (D) All of these
Description : The catabolite repression is mediated by a catabolite gene activator protein (CAP) in conjunction with (A) AMP (B) GMP (C) cAMP (D) Cgmp
Description : Fructose 2, 3 bi phosphate is a powerful allosteric activator of (A) Fructose 1, 6 diphosphatase (B) Phosphofructokinase (C) Hexokinase (D) Fructokinase
Description : An inorganic ion required for the activity of an enzyme is known as (A) Activator (B) Cofactor (C) Coenzyme (D) None of these
Description : In gluconeogensis, an allosteric activator required in the synthesis of oxaloacetate from bicarbonate and pyruvate, which is catalysed by the enzyme pyruvate carboxylase is (A) Acetyl CoA (B) Succinate (C) Isocitrate (D) Citrate
Description : Allosteric activator of glycogen synthase is (A) Glucose (B) Glucose-6-Phosphate (C) UTP (D) Glucose-1-phosphate
Description : Cytosolic and mitochondrial carbamoyl phosphate synthetase have the following similarity: (A) Both use ammonia as a substance (B) Both provide carbamoyl phosphate for urea synthesis (C) Both require N-acetylglutamate as an activator (D) Both are allosteric enzymes
Description : Allsoteric activator of glutamate dehydrogenase is (A) ATP (B) GTP (C) ADP and GDP (D) AMP and GMP
Description : Apolipoprotein C-II is an activator of (A) Lecithin cholesterola acyl transferase (B) Phospholipase C (C) Extrahepatic lipoprotein lipase (D) Hepatic lipoprotein lipase
Description : Apolipoprotien B-100 acts as (A) Enzyme activator (B) Ligand for receptor (C) Both (A) and (B) (D) None of these
Description : Apolipoprotein A-I acts as (A) Enzyme activator (B) Ligand for receptor (C) Both (A) and (B) (D) None of these
Description : The apolipoprotein which acts as activator of LCAT is (A) A-I (B) A-IV (C) C-II (D) D
Description : The compounds responsible for causing “socks” to stink are 1. Butyric acid 2. Dimethyl sulphide 3. 2-Heptanone 4. 2-Nonanone 5. 2-Octanone Which compound(s) is/are present in the “socks stink”? (a) 1, 2, 3, 4 and 5 (b) 1, 3, 4 and 5 (c) 1, 2, 3 and 5 (d) 1, 4 and 5