Free Biochemistry MCQs Mock Test Online with Answers

Q1 : Translation occurs at______________?

A: Mitochondria B: Centrosome C: Nucleus D: Ribosome

Q2 : Which metabolite of TCA cycle is used in detoxification of ammonia in brain_____________?

A: Alpha ketoglutarate B: Ornithine C: Oxalocetate D: Oxalocetate

Q3 : Which of the following is most important content of diet ?

A: Protein B: Water C: Vitamin D: Minerals

Q4 : Unwinding of DNA is done by____________?

A: DNAse B: Topo isomerase C: Ligase D: Reverse transcriptase

Q5 : Synthesis of protein occurs on__________________?

A: Mitochondria B: Poly ribosomes C: Nucleus D: Golgi bodies

Q6 : The antibacterial substance present in tears which acts by splitting cell wall components is____________?

A: Penicillin B: Lysozyme C: Betalysine D: Lactoperoxidase

Q7 : HMP shunt is of great importance in cellular metabolism because its produces_____________?

A: ATP B: ADP C: Acetyl CoA D: NADPH

Q8 : In mycocarrdial infarction the first enzyme to rise____________?

A: CPK B: LDH C: SGOT D: Amylase

Q9 : Colloidal osmotic pressure of plasma is by___________?

A: Albumin B: Fibrinogen C: Globulin D: Prothrombin

Q10 : False statement about haemoglobin structure________________?

A: False statement about haemoglobin structure________________? B: Iron is present in ferrous state C: Hb structurally similar to myoglobin D: Ferrous ions are in porphyrin rings

Q11 : Blood glucose level cannot be augmented by mobilization of muscle glycogen due to lack of_____________?

A: G-6-P dehydrogenase B: G-6-P phydrogenase C: Aldolase D: Glucokinase

Q12 : Calcitonin is antagonist_______________?

A: Parathyroid hormone B: Thyroxine C: Triidothyronine D: Serotonin

Q13 : In TCA, substrate level phospherylation takes place in______________?

A: Alpha ketoglutrate to succinyl CoA B: Succinyl CoA to Succinate C: Succinate to fumarate D: Oxalocetate to citrate

Q14 : Iron is present in all, EXCEPT______________?

A: Myoglobin B: Cytochrome C: Catalase D: Pyruvate kinase

Q15 : Daily requirement of iron in man is_____________?

A: 1gm B: 10 microgram C: 10 mg D: 20 mg

Q16 : Quaternary structure of protein is_____________?

A: The arrangement sequence of amino acids in the polypeptide chain B: Inter relation between amino acids in a single polypeptide chain C: Inter relation of amino acids in 2 polypeptide chains D: The inter relation and arrangement of polypeptides in a protein with more than 2 polypeptide chains

Q17 : Which is not a oligosaccharide sugar ?

A: Galactose B: Lactose C: Maltose D: Sucrose

Q18 : Codons are present on_____________?

A: m-RNA B: DNA C: t-RNA D: Ribosomal RNA

Q19 : All these reactions take place inside the mitochondria except____________?

A: EMP pathway B: Krebs cylce C: Urea cycle D: Electron transfer

Q20 : Hyponatremia is defined as a serum Na+ level ____________________?

A: < 135 mmol/L B: . >135 mmol/L C: < 160 mmo/L D: < 100 mmo/L

Q21 : Unsaturated fatty acids are converted to______________?

A: Prostaglandins B: Cholesterol C: Cell membrane lipid D: Saturated fatty acid

Q22 : Synthesis of protein occurs on_____________?

A: Mitochondria B: Poly ribosomes C: Nucleus D: Golgi bodies

Q23 : Fat provides ______% of body’s calories?

A: 40% B: 30% C: 50% D: 75%

Q24 : In Niemann-Pick’s disease the following substrance accumulate in CNS in excess______________?

A: Glycerophosphatides B: Phosphoinositides C: Phosphosphingosides D: Glycerosphingosides

Q25 : McArdles disease is due to the deficiency of_____________?

A: Glucose 1 phosphatase B: Glucose 1,6 phosphatase C: Glucose 6 phosphatase D: Myophosphorylase

Q26 : Insulin acts on which enzyme in glycolysis ?

A: Glucokinase B: Hexokinase C: Glucose 6 phosphatase D: Adenylate kinase

Q27 : Which cell organelle contains DNA_____________?

A: Mitochondrion B: Golgi body C: Endoplasmic reticulum D: Centriole

Q28 : In which type of glycogen storage disease is hyper uricemia a feature ?

A: I B: II C: III D: IV

Q29 : Nor epinephrine is converted to epinephrine by______________?

A: Dopamine hydroxylase B: Dopa decarboxylase C: O-methylation D: N-methylation

Q30 : Kreb’s cycle occurs in _________ conditions?

A: Aerobic B: Anaerobic C: Anaerobic D: Aerobic and anaerobic

Q31 : Which base is not found in DNA________________?

A: Adenine B: Guanine C: Cytosine D: Uracil

Q32 : The transmembrane adhesive molecules present in hemi desmosomes which specifically binds to basal lamina glycoprotein laminin are______________?

A: Integrin a6-B4 B: The catenins desmoplakin C: cadherins desmoglein D: a and B catenin

Q33 : Restriction endonuclease cleaves______________?

A: Double stranded DNA B: SIngle stranded DNA C: SIngle stranded RNA D: Polypeptide

Q34 : Nonsense codons bring about__________________?

A: Elongation of polypeptide chain B: Pre-translational modification of protein C: Initiation of protein synthesis D: Termination of protein synthesis

Q35 : Which one of the following human tissues contains the greatest amount of body glycogen ?

A: Liver B: Kidney C: Skeletal muscle D: Cardiac muscle

Q36 : Which of the following fatty acids are not syntehsised in human body____________

A: . Oleic, linoleic and linolenic acid B: Arachidonic, linolenic and linoleic acid C: Palmitic Oleic and arachidonic D: Linoleic, arachidonic and stearic acid

Q37 : Inside the cell, the substance, which contributes to most of the osmolality, is________________?

A: Protein B: Potassium C: Urea D: Phosphate

Q38 : Key enzyme in urea synthesis is____________? 0 A. Urease

A: Urease B: Carbamyl synthetase C: Arginase D: Ornithine

Q39 : Amino acids excreted in the urine in cystinosis______________?

A: Cystine B: Ornithine C: Lysine D: All of the above

Q40 : Benzidine test is positive with the enzyme______________?

A: Cytochrome oxidase B: Dehydrogenase C: Hydrolase D: Peroxidase

Q41 : The number of essential amino acid are______________?

A: 6 B: 8 C: 12 D: 16

Q42 : Oligosaccharide is________________?

A: Glucose B: Gructose C: Maltose D: Dextrin

Q43 : The activity of this plasma enzyme is responsible virtually for all plasma cholesterol esters in humans_______________?

A: Lecithin cholesterol acyl transferase (LCAT) B: Pyrophospho mevalonate decarboxylase C: HMG CoA reductase D: Phospho mevalonate kinase

Q44 : Which of these is not included in parenteral therapy ?

A: Carbohydrates B: Fibres C: Fats D: Micronutrients

Q45 : The product of oxidation of odd chainfatty acids is______________?

A: Aceto acetyl CoA B: Malonyl CoA C: Propionyl CoA D: Fumaryl CoA

Q46 : Gluconeogenesis occurs in the liver and _______?

A: Kidney B: Muscle C: Heart D: Fat

Q47 : Ketone bodies are normally synthesized from______________?

A: Acetyl-CoA B: Glucose C: Glycerol D: Acetone

Q48 : Hexokinase is a______________?

A: Transferase B: Reductase C: Oxidoreductase D: Oxidase

Q49 : The deficiency of thiamine can be identified by measuring the red cell______________?

A: Transketaolase B: Transaldolase C: Alpha ketoglutarate dehydrogenase D: Pyruvate dehydrogenase

Q50 : In human body which of the following trace element is next to iron_______________?

A: Ca++ B: Zn++ C: Cu++ D: Selenium

Q51 : Michaelis-Menten hypothesis states that_____________?

A: Rate of enzymatic reaction is independent of substrate concentration B: Rate of enzymatic reaction is independent of substrate concentration C: Km is the enzyme substrate complex association constant D: Enzyme- substrate complex formation is essential in enzymatic reaction

Q52 : Major contribution towards gluconeogenesis is by____________?

A: Lactate B: Ketones C: Glycerol D: Alanine

Q53 : Genes are_____________?

A: Ribonucleic acid B: Deoxy ribonucleic acid C: Lipoproteins D: Chromo proteins

Q54 : Under metabolic conditions associated with a high rate of fatty acid oxidation liver produces________________?

A: Glutamate B: . Acetoacetate C: Cholesterol D: Glycine

Q55 : True about G protein couple receptors is _________________ ?

A: G proteins bind to hormones on the cell surface B: All the three subunits alpha, beta and gamma should bind each other for G protein to act C: G Proteins act as inhibitory and excitatory because of difference in alpha subunit D: G protein is bound to GTP in resting state

Q56 : Enzymes stored in muscle is________________?

A: Alkaline phosphatase B: SGOT C: SGPT D: CPK

Q57 : The normal range of serum osmolality (in mosm/L) is_____________?

A: 280 to 295 B: 300 to 320 C: 350 to 375 D: 200 to 250

Q58 : Which of these organelle functions as the digestive system of the cell ?

A: Mitochondria B: Rough endoplasmic reticulum C: Golgi apparatus D: Lysomes

Q59 : Dietary fibre is rich in_____________?

A: Starch B: Cellulose C: Collagen D: Inulin

Q60 : The main function of HDL is____________?

A: Transport cholesterol from liver to peripheral tissues B: Esterification with PUFA C: Both of the above D: None of the above

Q61 : Most importent compansatory mechanism in metabolic acidosis______________?

A: Hyperventilation B: Increased NH3 excretion by kidneys C: Increased urinary phosphates D: Increased HCO3 Production

Q62 : Which of the following is precursor of adrenaline and thyroxine synthesis ?

A: Phenyl alanine B: Tyrosine C: Tryptophan D: None of the above

Q63 : Fructose intolerance is to_____________?

A: Fructose only B: Fructose and glucose C: Sucrose only D: Fructose and sucrose

Q64 : Cell membrane consists of_________________?

A: Lipids and proteins B: Lipids only C: Protein only D: None of the above

Q65 : The reducing equivalent for fatty acid synthesis is derived form____________?

A: Glycolysis B: Kreb’s cycle C: Urea cycle D: Pentose phosphate pathway

Q66 : The fastest moving fraction of protein in serum When subjected to paper electrophoresis is_____________?

A: Albumin B: Alpha 1 globulin C: Beta Globulin D: Gamma Globulin

Q67 : Non essential amino acids are not_____________?

A: Used by the body B: Forming part of the proteins C: Required in the diet D: Absorbed in the intestines

Q68 : The first product of glycogenolysis is_____________?

A: Glucose 6 phosphatase B: Glucose 1,6 diphosphatase C: Glucose 1- phosphatase D: Fructose 1- phosphatase

Q69 : Which one of the following is the correct sequential order in which the given enzymes of kreb’s cycle are formed after a molecule of acetyl CoA______________?

A: Citrate, Oxalocetate, Ketoglutarate B: Ketoglutarate, Oxalocetate, Citrate C: Citrate, Ketoglutarate, Oxalocetate D: Oxalocetate, Ketoglutarate, Citrate

Q70 : In ECF main electrolyte is_______________?

A: Na+ B: K+ C: Cl D: Proteins

Q71 : Major source of ammonia in the kidney is___________?

A: Urea Aspartate B: Aspartate C: Glutamine D: Glutamate

Q72 : In all the following RNA participates directly except________________?

A: Post translation modification B: Post transcriptional modification C: DNA replication D: Splicing

Q73 : During phagocytosis, the metabolic process called respiratory burst involves the activation of_____________?

A: Oxidase B: Hydrolase C: Peroxidase D: Dehydrogenase

Q74 : On complete hydrolysis of DNA we will get all the following except______________?

A: Deoxy pentose sugar B: Phosphoric acid C: Adenosine D: Purine bases

Q75 : Thyroxine and catecholamines are derived from_____________?

A: Tyrosine B: Tryptophan C: Alanine D: Leucine

Q76 : The main enzyme responsible for activation of xenobiotics in (detoxification)____________?

A: Cytochrome P-450 B: Glutathione S-transferase C: NADPH cytochrome P-450 reductase D: Glucuronyl transferase

Q77 : Free radicals are chemical species which have______________?

A: Single unpaired electron in an outer orbit B: Single paired electron in an outer orbit C: Double unpaired electron in an outer orbit D: Double paired electron in an outer orbit

Q78 : All are genetic amino acid deficiency disease except___________?

A: Phenyl ketonuria B: Alkaptonuria C: Homocystinuria D: 6alactosemia

Q79 : Glucose can be synthesized from all except_____________?

A: Amino acids B: Glycerol C: Acetoacetate D: Lactic acid

Q80 : Which of the following is NOT a characteristic feature of allosteric enzymes ?

A: They are multienzyme complex B: Follow Michaelis-Menton Kinetics C: Presence of Modulator site D: Give sigmoid shaped curve

Q81 : Examples of monounsaturted fatty acids are______________?

A: Oleic acid B: Arachitlonic acid C: Linolenic acid D: Palmitic acid

Q82 : Chargaff rule states that___________?

A: A+G=T+C B: A/T=G/C C: A=U=T=G=C D: A+T=G+C

Q83 : The fuel value of fat is____________?

A: 4 B: 7 C: 9 D: 5

Q84 : Which of the organelles contain DNA_________________?

A: Nucleus B: Golgi apparatus C: Nucleolus D: Golgi apparatus

Q85 : The lipoprotein particles that have the highest percentage concentration of cholesterol is_______________?

A: Chylomicron B: VLDL (Very low density lipoprotein) C: VLDL (Very low density lipoprotein) D: HDL (High density lipoprotein)

Q86 : Ribosomes are usually associated with______________?

A: Endoplasmic reticulum B: Mitochondria C: Nucleolus D: Plasma membrane

Q87 : Non polar lipid act as______________?

A: Electrical insulators B: Irons C: Non electrical insulators D: Electrolytes

Q88 : Enzymes concerned with the citric acid cycle are found in______________?

A: Nucleus B: Mitochondria C: Ribosomes D: Non-particulate cytoplasm

Q89 : Cholesterol levels in abnormal person should be preferably less than_____________?

A: 200 mg/dl B: 180 mg/dl C: 150 mg/dl D: 120 mg/dl

Q90 : The immediate precursor of norepinephrine is______________?

A: Epinephrine B: Tyrosine C: Dopamine D: Phenylalanine

Q91 : The primary role of chaperones is to help in______________?

A: Protein synthesis B: Protein degradation C: Protein denaturation D: Protein folding

Q92 : In prolonged starvation the main nergy source of brain is_____________?

A: Glucose B: Ketone bodies C: Fructose D: Fatty acids

Q93 : Which of the following is present in the plasma but absent in the serum ?

A: Albumin B: Globulin C: Lecithin D: Firbinogen

Q94 : In the physiological system, nitric oxide is known to act through_______________?

A: Cyclic AMP B: Calcium ions C: Cyclic GMP D: Prostacyclins

Q95 : Detoxification or protective synthesis occurs by____________?

A: Oxidation B: Reduction C: Conjugation D: Any of the above

Q96 : Iron is present in all of the following except_______________?

A: Myoglobin B: Cytochrome C: Catalase D: Pyruvate kinase

Q97 : The main pathway for De – Novo synthesis of fatty acids occurs in_______________?

A: Mitochondria B: Nucleus C: Cytosol D: None of the above

Q98 : Which of the following is a phospholipid________________?

A: Glycogen B: Sphingomyelin C: Prostaglandin D: Oleic acid

Q99 : Ubiqultin is involved in_____________?

A: Intracellular proteolysis B: Electron transport chain C: Transport of ATP D: Protein folding

Q100 : Coenzyme responsible for single carbon transfer is______________?

A: Acetyl co enzyme A B: Biotin C: THF4 D: Pyridoxine

Free Biochemistry MCQs Mock Test Online with Answers

Time to prove what you know!

LAT Test

GAT Test

Contact Info

Free Biochemistry MCQs Mock Test Online with Answers

Subscribe our Newsletter

LAT Test

GAT Test

Contact Info