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Free download in PDF Biochemical Basis of Sports Performance Multiple Choice Questions(MCQs) with 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.
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
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
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
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
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
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
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)
74
The average intensity of exercise during professional soccer play is about:
[A]
25%VO2max
[B]
50%VO2max
[C]
75%VO2max
[D]
90%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
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
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
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