LPT Quiz 31 Quiz InstructionsThis quiz consists of 20 multiple-choice questions.You will be awarded 5 marks for each correct answer. Question 1: Which of the following traditional non-specific meat products is correctly matched with its Indian state of origin according to the text?Pork pickle - KashmirNihari - GoaPork pickle - Himachal PradeshRapka - Delhi Question 2: According to the text, what percentage of the live weight and carcass weight of meat animals is typically made up of skeletal muscles?20-35% of live weight or 40-50% of carcass weight30-45% of live weight or 35-60% of carcass weight35-60% of live weight or 30-45% of carcass weight50-70% of live weight or 60-80% of carcass weight Question 3: Compared to white muscle fibres, what are the characteristic features of red muscle fibres in terms of diameter and enzymatic activity?Larger diameter and higher ATPase activityLarger diameter and lower oxidative metabolismSmaller diameter and higher glycolytic metabolismSmaller diameter and lower ATPase activity Question 4: According to the structural description of a myofibril, which of the following is true regarding the filament composition of the H-zone?It contains only thin filaments.It contains only thick filaments.It contains both thick and thin filaments in equal proportions.It represents the area where actin and myosin overlap. Question 5: Which specific sub-unit of the regulatory protein troponin is responsible for binding to calcium ions?Troponin TTroponin ITroponin CTroponin A Question 6: Based on the concentration of myoglobin in the loin muscle of different species, which of the following options lists the animals in the correct increasing order?Pig < Rabbit < Sheep < CattleRabbit < Pig < Sheep < CattleSheep < Pig < Rabbit < CattleRabbit < Sheep < Pig < Cattle Question 7: At what temperature do white collagen fibres typically shrink or shorten, and what do they transform into upon boiling?50°C; insoluble elastin60°C; water-soluble gelatin70°C; soluble reticulin80°C; mucopolysaccharide matrix Question 8: Which two unique amino acids are present in elastin and contribute to its highly insoluble nature?Hydroxyproline and hydroxylysineDesmosine and isodesmosineCarnosine and anserineMyristic acid and palmitic acid Question 9: According to the text, how much more thiamine does lean pork typically contain compared to mutton and other meats?2 to 3 times more5 to 10 times more12 to 15 times more20 times more Question 10: Match the muscle structural components in Column I with their correct anatomical descriptions in Column II:Column I:1. Epimysium2. Perimysium3. Endomysium4. SarcolemmaColumn II:A. Connective tissue layer surrounding a muscle fibreB. Connective tissue sheath surrounding the entire muscleC. Delicate muscle cell membrane beneath the endomysiumD. Connective tissue septum surrounding muscle bundles (fasciculi)1-B, 2-D, 3-A, 4-C1-D, 2-B, 3-C, 4-A1-B, 2-A, 3-D, 4-C1-C, 2-D, 3-A, 4-B Question 11: Match the muscle protein groups in Column I with their solubility characteristics and examples in Column II:Column I:1. Sarcoplasmic proteins2. Myofibrillar proteins3. Stroma proteinsColumn II:A. Soluble in dilute salt solutions; comprises myosin and actinB. Almost insoluble; comprises collagen and elastinC. Soluble in water or very dilute salt solutions; comprises glycolytic enzymes and myoglobin1-A, 2-C, 3-B1-C, 2-A, 3-B1-B, 2-A, 3-C1-C, 2-B, 3-A Question 12: Match the meat pigments and species in Column I with their corresponding characteristic visual appearances in Column II:Column I:1. Oxymyoglobin2. Metmyoglobin3. Fresh Pork4. Buffalo meatColumn II:A. Brown colourB. Greyish pinkC. Bright red (bloom)D. Cherry red1-C, 2-A, 3-B, 4-D1-A, 2-C, 3-B, 4-D1-C, 2-D, 3-B, 4-A1-B, 2-A, 3-C, 4-D Question 13: Match the meat condition/defect in Column I with its underlying postmortem cause in Column II:Column I:1. Cold shortening2. Thaw rigor3. Pale, soft, and exudative (PSE) condition4. Dark, firm, and dry (DFD) conditionColumn II:A. Sharp decline in postmortem pH before body heat is dissipatedB. Constant maintenance of a high pH during postmortem conversionC. Pre-rigor meat frozen, leading to severe contraction upon thawingD. Fast chilling of pre-rigor meat below 15°C1-D, 2-C, 3-A, 4-B1-C, 2-D, 3-B, 4-A1-D, 2-A, 3-C, 4-B1-A, 2-C, 3-D, 4-B Question 14: Evaluate the following statements regarding water and its distribution in muscle tissue:I. Nearly 70% of the water content in fresh meat is located within the myofibrils.II. Bound water represents about 4-5% of the water molecules, which are tightly bound to the charged hydrophilic groups of muscle proteins.III. When the pH of meat is below its isoelectric point, the increased negative charge expands the interfilamental space, allowing for excess water retention.Which of these statements are correct?I and II onlyII and III onlyI and III onlyI, II, and III Question 15: Consider the following statements regarding smooth and cardiac muscle tissues:I. Smooth muscle myofibrils are homogeneous and lack alternating dark and light bands, Z-lines, and M-lines.II. Cardiac muscle cells feature peripherally located nuclei and contain fewer mitochondria than skeletal muscle cells.III. Intercalated discs are present in cardiac muscles at the position of the Z-lines.Which of the statements are correct?I and II onlyI and III onlyII and III onlyI, II, and III Question 16: Evaluate the following statements regarding postmortem changes in muscle:I. Cathepsins are autolytic lysosomal enzymes that remain inactive in living muscle but are activated as pH declines postmortem.II. Catheptic enzymes are capable of breaking down even the collagenous connective tissue of the muscle to cause tenderisation.III. The resolution of rigor mortis occurs primarily due to the rapid resynthesis of ATP under aerobic conditions postmortem.Which of these statements are correct?I and II onlyII and III onlyI and III onlyI, II, and III Question 17: Assertion (A): It is highly beneficial to shift the focus of meat exports from primary products (live animals and fresh meat) to value-added processed meat products.Reason (R): Value-added products yield higher profits, reduce transportation costs, create more employment opportunities, and promote the efficient utilization of meat by-products.Both A and R are true, and R is the correct explanation of A.Both A and R are true, but R is not the correct explanation of A.A is true, but R is false.A is false, but R is true. Question 18: Assertion (A): Myofibrillar proteins are of outstanding interest to meat processing technologists.Reason (R): These proteins contribute to approximately 95% of the water-holding capacity and 75% of the emulsifying capacity of meat.Both A and R are true, and R is the correct explanation of A.Both A and R are true, but R is not the correct explanation of A.A is true, but R is false.A is false, but R is true. Question 19: Assertion (A): Pigs suffering from Porcine Stress Syndrome (PSS) post-transportation often yield pale, soft, and exudative (PSE) meat.Reason (R): Environmental stress in these susceptible animals triggers rapid postmortem ATP depletion, accelerated lactic acid accumulation, and a sharp fall in pH while body heat is still high.Both A and R are true, and R is the correct explanation of A.Both A and R are true, but R is not the correct explanation of A.A is true, but R is false.A is false, but R is true. Question 20: Which of the following outlines the correct chronological sequence of physiological events in muscle tissue following exsanguination (bleeding)?Depletion of CP -> Inhibition of aerobic pathway -> Shift to anaerobic glycolysis -> Lactic acid accumulation -> pH decline -> ATP depletion -> Permanent actomyosin cross-bridge formationInhibition of aerobic pathway -> Depletion of CP -> Shift to anaerobic glycolysis -> Lactic acid accumulation -> pH decline -> ATP depletion -> Permanent actomyosin cross-bridge formationShift to anaerobic glycolysis -> Depletion of CP -> Lactic acid accumulation -> Inhibition of aerobic pathway -> ATP depletion -> pH decline -> Actomyosin cross-bridge formationInhibition of aerobic pathway -> Shift to anaerobic glycolysis -> Lactic acid accumulation -> pH decline -> Depletion of CP -> Actomyosin cross-bridge formation -> ATP depletion
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