NET, IAS, State-SET (KSET, WBSET, MPSET, etc.), GATE, CUET, Olympiads etc.: Medical Science MCQs (Practice_Test 135 of 135)
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- The symptoms of Parkinsons disease are caused by the lesion of connections of basal ganglia at the site between
- Cerebral cortex and caudate nucleus
- Putamen and substantia nigra
- Thalamus and cerebral cortex
- Caudate nucleus and globus pallidus
- Fructose, the major energy source for spermatozoa in seminal fluid, is formed by
- dephosphorylation of fructose-1-phosphate
- reduction of D-glucose to sorbitol and oxidation of sorbitol to D-fructose
- isomerization of glucose-6-phosphate to fructose-6-phosphate and dephosphorylation of fructose-6-phosphate
- dephosphorylation of fructose-6-phosphate.
- Which of the following are associated with papillary muscles of the heart?
- Helping the a-v valves to close
- Preventing excessive bulging of a-v valves into atria.
- U wave of the ECG.
- Helping the a-v valves to open.
- Select the correct answer using the codes given below:
- 2 and 4
- 3 and 4
- 1 and 3
- 1 and 2
- Consider the following statements: Flare in Triple response can appear
- with intact nerves.
- after the division but before the degernation of nerves.
- after the division and degernation of nerves.
- Which of the statements is⟋are correct?
- 1 and 2
- 3 alone
- 2 alone
- 1 and 3
- Consider the following statements: Voluntary control of respiration is
- under the control of cerebral cortex.
- mediated by hypothalamus.
- the cause of exercise hyperventilation.
- not influenced by medullary rhythmicity area.
- Which of the statements are correct?
- 1 and 4
- 1 and 2
- 1,2 and 3
- 2,3 and 4
- The given figure variation of plasma level with urinary excretion. Based on this, the transport maximum for glucose (TmG) will be
- 200 mg⟋min
- 300 mg⟋min
- 350 mg⟋min
- 375 mg⟋min
- Which one of the following mechanisms is not involved in the regulation of blood pH by the kidneys?
- Reabsorption of HCO3 by renal tubular cells
- Formation of ammonia and its elimination as NH4 + ion in the urine
- Transport of reduced haemoglobin to kidney to liberate the acid ion
- Formation of Na2HPO4 and its elimination through the urine
- Lipase present in the stomach does not play a significant role in the digestion of dietary lipids because of
- Antilipase factors in gastric juice
- Intrinsic factor in gastric juice
- Mucous secretions
- Acidity of gastric juice
- Congenital abetalipoproteinemia is due to decreased synthesis of
- Apolipoprotein B − 48 in the intestinal mucosal cells
- Apolipoprotein B − 100 in the intestinal mucosal cells
- Apolipoprotein a-II the intestinal mucosal cells
- Apolipoprotein C-II in the liver
- The rate limiting step in glycolytic process is
- Glucose to glucose-6-phosphate
- Fructose-6-phosphate to fructose-1,6-diphosphate
- pyruvate to lactate
- phosphoenolpyruvate to pyruvate
- Muscle glycogen cannot contribute directly to blood glucose level because
- muscle glycogen cannot be converted into glycose-6-phosphate
- muscle lacks phosphoglucoisomerase
- muscle does not contain glucokinase
- muscle lacks glucose-6-phosphatase
- Genetic information originates from
- cistrons of DNA
- anticodons of tRNA
- histones of nucleoproteins
- codons of mRNA
- What is the function of the acceptor arm of tRNA molecules?
- It binds with specific amino acids to form aminoacyl tRNA
- It helps in the recognition of the codon of mRNa
- It helps in the transfer of mRNA from the nucleus to the cytoplasm
- It binds with the initiation factors to form the initiation complex during protein synthesis
- The codons code for the same amino acid in all organisms. Therefore they are
- non overlapping
- degenerate
- universal
- unambiguous
- Which one of the following sub-units of a ribosome binds to the mRNA to initiate protein synthesis?
- 60 S
- 60 S GTP complex
- 40 S
- 40 S ATP complex