Biochemical Basis of Sports Performance Quiz | Biochemical Basis of Sports Performance Objective Type Questions & Answers

Questions
21 Glycolysis is the name given to the pathway involving the conversion of:
A glycogen to glucose-6-phosphate
B glycogen or glucose to fructose
C glycogen or glucose to pyruvate or lactate
D glycogen or glucose to pyruvate or acetyl CoA

Answer: glycogen or glucose to pyruvate or lactate
22 The energy released from the breakdown of the high-energy phosphates, ATP and phosphocreatine, can sustain maximal exertion exercise for about:
A 1-2 seconds
B 5-10 seconds
C 30-40 seconds
D 50-60 seconds

Answer: 5-10 seconds

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23 The energy charge of the cell is:
A the difference between the charge on the outside and inside of a cell
B generated by the sodium-potassium ATPase
C the overall rate of energy use by the cell
D the extent to which the total adenine nucleotide pool is phosphorylated

Answer: the extent to which the total adenine nucleotide pool is phosphorylated
24 In general, the higher the intensity of exercise, the greater the proportional contribution of:
A aerobic energy production
B anaerobic energy production
C the TCA cycle (Krebs’ cycle) to the production of ATP
D the electron transfer chain to the production of ATP

Answer: anaerobic energy production
25 The most rapid method to resynthesise ATP during exercise is through:
A glycolysis
B phosphocreatine breakdown
C tricarboxylic acid cycle (Krebs’ cycle)
D glycogenolysis

Answer: phosphocreatine breakdown
26 Anaerobic metabolism refers to the generation of ATP:
A without the involvement of ADP
B without the use of glycogen
C without the use of oxygen
D in the absence of available oxygen

Answer: without the use of oxygen
27 Which of the following is true?
A increasing the protein intake above 3 grams per kg body mass per day will stimulate muscle growth and increase strength
B creatine supplements can increase muscle strength and power
C amino acid supplements can increase muscle strength and power
D muscle damage is induced by shortening contractions

Answer: creatine supplements can increase muscle strength and power
28 Which of the following statements is false?
A after a resistance training session the rate of protein synthesis in the exercised muscles is increased
B after a resistance training session the rate of protein breakdown in the exercised muscles is increased
C both (a) and (b)
D protein cannot be used as a fuel for exercise

Answer: protein cannot be used as a fuel for exercise
29 For very high force contractions lasting 1-2 seconds, the initial energy source is from:
A glycolysis
B creatine phosphorylation
C phosphocreatine stores
D ATP stores

Answer: ATP stores
30 The energy for all forms of muscle contraction is provided by:
A ATP
B ADP
C phosphocreatine
D oxidative phosphorylation

Answer: ATP
31 The conversion of one molecule of glucose to two molecules of pyruvate results in the net formation of:
A six molecules of water
B two molecules of ATP
C three molecules of ATP
D thirty-eight molecules of ATP

Answer: two molecules of ATP
32 The creatine kinase reaction is:
A irreversible
B slow compared with glycolysis
C not activated until all the ATP has been used up
D inhibited by low pH in the muscle

Answer: inhibited by low pH in the muscle
33 The complete resynthesis of phosphocreatine after very high intensity exercise normally takes:
A about 4 minutes
B about 1 minute
C about 30 seconds
D about 10 seconds

Answer: about 4 minutes
34 The enzymes of glycolysis are located in the:
A mitochondrion
B nucleus
C cytoplasm
D lysosomes

Answer: cytoplasm
35 Glycogen breakdown in exercising muscle is activated by:
A insulin
B cortisol
C increased pH
D none of the above

Answer: none of the above
36 If the mean rate of oxygen consumption of a male athlete during a training session is 2l/min, then his rate of energy expenditure is approximately:
A 40 kJ/min
B 80 kJ/min
C 400 kJ/min
D 200 kJ/min

Answer: 40 kJ/min
37 After what period of time does maximal dynamic exercise become predominantly aerobic?
A 10 seconds
B 30 seconds
C 1 minute
D 4 minutes

Answer: 1 minute
38 Hydrogen ions are formed when:
A glycogen becomes depleted
B phosphocreatine breakdown occurs
C pyruvate is converted to acetyl CoA
D glycolysis is being used as a major means of resynthesising ATP

Answer: glycolysis is being used as a major means of resynthesising ATP
39 The net production of ATP via substrate-level phosphorylation in glycolysis is:
A 2 from glucose and 3 from glycogen
B 2 from glucose and 4 from glycogen
C 3 from glucose and 4 from glycogen
D 3 from glucose and 2 from glycogen

Answer: 2 from glucose and 3 from glycogen
40 The average intensity of exercise (%VO2max) for an elite middle distance runner during a 1500 m race will be about:
A 80%VO2max
B 100%VO2max
C 120% VO2max
D 200%VO2max

Answer: 120% VO2max
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