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Free download in PDF Biochemical Basis of Sports Performance Objective Type Questions & Answers for competitive exams. These short objective type questions with answers are very important for Board exams as well as competitive exams. These short solved questions or quizzes are provided by Gkseries.
(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
(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
(30)
The energy for all forms of muscle contraction is provided by:
[A]
ATP
[B]
ADP
[C]
phosphocreatine
[D]
oxidative phosphorylation
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
34
The enzymes of glycolysis are located in the:
[A]
mitochondrion
[B]
nucleus
[C]
cytoplasm
[D]
lysosomes
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
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
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
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