NEET (Medical) Biology — Biochemistry Mock Test
20 free timed sets · 1,000 questions · 0 easy / 0 moderate / 1,000 hard · solutions for every question
All Biology — Biochemistry sets
Sample Biology — Biochemistry questions
1. Which vitamin dificiency causes glossitis and cheilosis -
- (A) Thiamin
- (B) Vitamin A
- (C) Riboflavin
- (D) Folic acid
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(C) Riboflavin. Ans. is 'b' i.e., Riboflavin NameActive formSourcesDaily requirementsFunctionsDeficiency manifestationsFAT SOLUBLE V ITAMINSVitamin A (Ratinol)Retinol, Retinal,Retinoic acidFish liver oils milk, milk products. Green leafy vegetables, carrots, yellow and red fruits800-1000Retinol equivalentsRetinal and retinol are involved in vision. Retinoic acid regulates the expression of gene during growth and development AntioxidantNight blindness xerophthalmia formation of Bitot's spots, dry, rough and scally skin. Retardation of growth in children.Vitamin D (Cholecalci- ferol)1, 25-Dihydroxy-cholecatcifenolCod liver oil. sunlight induced synthesis of vitamin D3 in skin egg yolk200-400 IURegulation of the plasmal of calcium and phosphorus, calcification of boneRickets (in children) Osteomalacia (in adults)Vitamin E (a-Tocopherol)a-tocopherolSoya and com oils, germ oil, fish oil, eggs, alfalfa8-10 mgNatural antioxidant and acts as a scavenger of free radicals.Protects the RBCs from hemolysis.Prevents peroxidation of PUFA in cell membraneHemolytic anemia.Retrolental fibroplasia (RLF) in premature infantsVitamin KPhylloquinone (Vitamin K,)Menaquinone (Vitamin K,)Green leafy vegetables, tomatoes, cheese, meat egg yolk70-140 gRequired for activation of blood clotting factors Required for y carboxylation of glutamic acid residue in clotting and oseocalcin proteinsHemorrhagic disorder, increased clotting time NameActive formSourcesDaily-requirementsFunctionsDeficiency manifestationsWATER SOLUBLE VITAMINSThiamine (Vitamin B1)TPPCereals, meat, ruts green vegetables, eggs1.0-1.5 mgCoenzyme for oxidative decarboxylation and transketolase reactionsBeriberi, Wernicke Korsakoff syndromeRiboflavin (Vitamin B2)FMN, FADYeast, germinating seeds, green leafy vegetables, milk, eggs, liver, meat1.3-1.7 mgCoenzyme for oxidation reduction reactionsCheilosis, glossitis, dermatitis vascularization of corneaNiacin (Vitamin B3)NAD+ and NADP+Yeast, legumes. liver, meat15-20 mgCoenzyme for oxidation reduction reactionsPellagraPantothenic acid (Vitamin B5)Coenzyme A, (CoA-SH)Wheat germs, cereals, yeast, liver, eggs5-10 mgAcyl carrierBurning feet syndromePyriodoxin (Vitamin B6)PLPYeast, unrefined cereals, pulses, vegetables, meat, fish, egg yolk1.6-2 mgCoenzyme for transami- nation, decarboxylation, non-oxidative deamination, trans-sulfuration reactionsEpileptic consuls ions dermatitis, hypochronic microcytic anemiaBiotin (Vitamin B7)Biocytin (Enzyme bound biotin)Liver, kidney, egg yolk vegetables150-300 gCoenzyme for carboxylation reactionsRare dermatitisFolic acid (Vitamin B9)THF (Tetrahydrofolic acid)Green leafy vegetables, liver, yeast200 gCarrier of one carbon unit. Synthesis of methionine, purines and pyrimidinessMegaloblastic anemia. Neural tube defectsCynocobalamin (Vitamin B12,)Methylcobalamin.Deoxyadeno-sylcobalaminOnly animal origin, meat, egg, liver, fish3 gCoenzyme for react ins: Homocysteine to Methionine. Methylmalonyl-CoA to Succinyl-CoAPernicious anemiaMegaloblastic anemia Neuropathy (dementia)Methylmalonic aciduriaAscorbic acid (Vitamin C)Ascorbic acidCitrus fruits. AmIa, leafy vegetables, tomatoes60-70 mgAntioxidant, involved in hydroxylation reactins in the synthesis collagen, steroid hormones, adrenaline, etc. facilitates absorption of iron from intestine.Scurvy
2. Source of energy in Kreb's cycle is -
- (A) NADPH
- (B) NADP
- (C) NAD
- (D) NADH
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(D) NADH. Energetics of TCA cycles (Kreb's cycle)One turn of the TCA cycle, staing with acetyl CoA produces 10 ATPs. When the staing molecule is pyruvate, the oxidative decarboxylation of pyruvate, the oxidative decarboxylation of pyruvate yields 2.5 ATPs and therefore, 12-5 ATPs are produced when staing compound is pyruvate. Since, two molecules of pyruvate enter the TCA cycle when glucose is metabolized (glycolysis produces 2 molecules of pyruvate), the number of ATPs is doubled. Therefore, 25 ATP molecules, per glucose molecule, are produced when pyruvate enters the TCA cycle.Note : Previously calculations were made assuming that NADH produces 3 ATPs and FADH generates 2 ATPs. This will amount a net generation of 30 ATP molecules in TCA per molecule glucose and total 38 molecules from staing. Recent experiments show that these values are overestimates and NADH produces 2.5 ATPs and FADH produces 1.5 ATPs. Therefore, net generation during TCA is 25 ATPs and complete oxidation of glucose through glycolysis plus citric acid cycle yield a net 32 ATPs.Energy yield (number of ATP generated) per molecule of glucose when it is completely oxidized through glycolysis plus citric acid cycle, under aerobic conditions, is as follows :-
3. In which of the following conditions the level of creatinine kinase 1 increases?
- (A) Brain Ischemia
- (B) Kidney damage
- (C) Electrical cardioversion
- (D) Myocardial ischemia
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(A) Brain Ischemia. Ans. B. Brain IschemiaLocalization of CPK isoenzymesa. CPK 1 (CPK BB) - Brainb. CPK 2 (CPK MB) - Myocardiumc. CPK 3 (CPK MM) - Skeletal muscle
NEET (Medical) Biology — Biochemistry — FAQs
Is the NEET (Medical) Biology — Biochemistry mock test free?
Yes. All 20 Biology — Biochemistry sets are free, need no signup, and give instant scores with a solution for every question.
How many Biology — Biochemistry questions are there for NEET (Medical)?
1,000 questions across 20 sets: 0 easy, 0 moderate and 1,000 hard.
Will I get the same questions again?
No. Each attempt draws a fresh random subset, shuffles the order and options, and prefers questions you have not seen on this device. The Surprise Set draws from the whole subject pool.
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Yes — pick Easy, Moderate, Hard or Mixed, and choose no timer, 10 or 20 minutes, or the real exam pace.