Biochemical Basis of Sports Performance Quiz | Biochemical Basis of Sports Performance Multiple Choice Questions(MCQs) with Answers

Sports GK Questions and Answers 2024 (Latest Updated)

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Questions
61 The respiratory exchange ratio (RER) is the ratio of:
A volume of oxygen consumed ÷ volume of carbon dioxide produced
B volume of carbon dioxide produced ÷ volume of oxygen consumed
C volume of oxygen produced ÷ volume of carbon dioxide consumed
D volume of oxygen consumed ÷ body mass

Answer: volume of carbon dioxide produced ÷ volume of oxygen consumed
62 Resting oxygen uptake for a 70 kg person is approximately:
A 1.0 l.min-1
B 2.5 ml.min-1
C 0.25 l.min-1
D 45 ml.min-1

Answer: 0.25 l.min-1
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63 Approximately how much energy is liberated when one gram of carbohydrate is completely oxidised?
A 4 kJ
B 8 kJ
C 16 kJ
D 24 kJ

Answer: 16 kJ
64 Muscle and liver glycogen stores in a well nourished athlete would be sufficient to sustain approximately how many minutes of submaximal exercise (if this were the only energy source used)? The exercise is club level marathon pace.
A 30 minutes
B 90 minutes
C 180 minutes
D 210 minutes

Answer: 90 minutes
65 How many ATP molecules can be derived from each molecule of acetyl CoA that enters the Krebs’ Cycle?
A 6
B 12
C 18
D 38

Answer: 12
66 Pairs of electrons carried in the form, FADH2 and NADH+H, collectively contain enough free energy to rephosphorylate:
A 6 ATP
B 5 ATP
C 4 ATP
D 3 ATP

Answer: 5 ATP
67 Which of the following statements is false?
A phosphofructokinase is the rate limiting enzyme in glycolysis
B phosphorylase activity is higher in Type II fibres than in Type I fibres
C oxygen is consumed in the TCA cycle
D endurance training increases the amount of TCA cycle enzymes in muscle

Answer: oxygen is consumed in the TCA cycle
68 Substrate-level phosphorylation differs from oxidative phosphorylation in that:
A oxidative phosphorylation involves the transfer of electrons
B oxidative phosphorylation only occurs in the cytosol
C substrate-level phosphorylation involves the transfer of electrons
D substrate-level phosphorylation only occurs in the cytosol

Answer: oxidative phosphorylation involves the transfer of electrons
69 The oxidative deamination of the amino acid alanine in muscle produces:
A one molecule of pyruvic acid and a molecule of ammonia
B one molecule of pyruvic acid and a molecule of carbon dioxide
C one molecule of pyruvic acid and another amino acid
D one molecule of pyruvic acid and a molecule of water

Answer: one molecule of pyruvic acid and a molecule of ammonia
70 Which of the following is not a true statement?
A muscle glycogen is broken down enzymatically to glucose-1-phosphate
B elite endurance runners have a high proportion of Type I fibres in their leg muscles
C liver glycogen is important in the maintenance of the blood glucose concentration
D insulin promotes glucose uptake by all tissues in the body

Answer: insulin promotes glucose uptake by all tissues in the body
71 Oxygen is used:
A in glycolysis
B in the conversion of fatty acids to acetyl CoA
C in the tricarboxylic acid cycle (Krebs’ cycle)
D in glycogenolysis

Answer: in the conversion of fatty acids to acetyl CoA
72 How many CO2 and ATP molecules are formed during one complete turn of the tricarboxylic acid cycle (Krebs’ cycle)?
A 2CO2 and 2ATP
B 2CO2 and 16ATP
C 2CO2 and 12ATP
D 2CO2 and 1ATP

Answer: 2CO2 and 1ATP
73 Which of the following factors stimulate insulin secretion?
A a rise in the blood glucose concentration
B a rise in the blood amino acid concentration
C a rise in the blood adrenaline concentration
D both (a) and (b)

Answer: both (a) and (b)
74 The average intensity of exercise during professional soccer play is about:
A 25%VO2max
B 50%VO2max
C 75%VO2max
D 90%VO2max

Answer: 75%VO2max
75 With an increasing number of sprints the:
A anaerobic contribution progressively increases
B pH of the muscle falls below 6.0
C blood glucose concentration falls below 3 mmol/L
D relative contribution of aerobic metabolism increases

Answer: relative contribution of aerobic metabolism increases
76 The pyruvate dehydrogenase complex:
A is located in the sarcoplasm
B catalyses the conversion of pyruvate to acetyl CoA
C catalyses the conversion of pyruvate to lactate
D catalyses the conversion of lactate to pyruvate

Answer: catalyses the conversion of pyruvate to acetyl CoA
77 Phophocreatine resynthesis during recovery from exercise is inhibited by:
A an excess of creatine
B hyperventilation
C an excess of oxygen
D a lack of oxygen

Answer: a lack of oxygen
78 The recommended dose of creatine to load the muscles of a 70 kg man within one week is:
A 2 g/day
B 5 g/day
C 10 g/day
D 20 g/day

Answer: 20 g/day
79 An expected side effect of creatine supplementation is:
A muscle weakness
B gain in body mass
C muscle cramps
D loss of electrolytes

Answer: gain in body mass
80 In a double stranded molecule of DNA, the ratio of purines : pyrimidines is:
A variable
B determined by the base sequence in RNA
C genetically determined
D always 1:1

Answer: always 1:1

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