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Free download in PDF Biochemical Basis of Sports Performance Multiple Choice Questions(MCQs) & 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.
(1)
What type of covalent bonds link the amino acids in a protein?
[A]
peptide bonds
[B]
hydrogen bonds
[C]
ionic bonds
[D]
glycosidic bonds
(2)
Which of the following is not an amino acid?
[A]
glutamic acid
[B]
aspartic acid
[C]
glutamine
[D]
palmitic acid
(3)
Type I muscle fibres have the following characteristics:
[A]
white, glycolytic, slow contracting
[B]
white, oxidative, slow contracting
[C]
red, oxidative, fast contracting
[D]
red, oxidative, slow contracting
Answer: red, oxidative, slow contracting
(4)
Fast-twitch fibres contain:
[A]
a relatively large number of mitochondria and low ATPase activity
[B]
a relatively small number of mitochondria and low ATPase activity
[C]
a relatively small number of mitochondria and high ATPase activity
[D]
a relatively large number of mitochondria and high ATPase activity
Answer: a relatively small number of mitochondria and high ATPase activity
(5)
A muscle fibre relaxes when:
[A]
the nerve stimulus is removed
[B]
the nerve stimulus is too forceful
[C]
the actin binding sites are uncovered
[D]
the actin binding sites are saturated
Answer: the nerve stimulus is removed
(6)
After calcium ions have been released from the sarcoplasmic reticulum they:
[A]
initiate an action potential
[B]
cause sodium channels to open in the sarcolemmal membrane
[C]
bind to troponin
[D]
bind to actin
(7)
The trigger to initiate the contractile process in skeletal muscle is:
[A]
potassium binding to myosin
[B]
calcium binding to tropomyosin
[C]
ATP binding to the myosin cross bridges
[D]
calcium binding to troponin
Answer: calcium binding to troponin
(8)
An action potential arriving at the motor endplate causes release of:
[A]
acetylcholine which traverses the neuromuscular junction
[B]
sodium ions which binds to sodium receptors on the muscle membrane
[C]
calcium ions which initiate an action potential along the muscle fibre
[D]
noradrenaline which increases muscle metabolic activity
Answer: acetylcholine which traverses the neuromuscular junction
(9)
The sarcoplasmic reticulum in muscle cells acts as a:
[A]
store of digestive enzymes
[B]
store of sodium ions
[C]
store of lipid
[D]
store of calcium ions
Answer: store of calcium ions
(10)
The two principal contractile proteins found in skeletal muscle are:
[A]
actin and troponin
[B]
actin and myosin
[C]
troponin and tropomyosin
[D]
myosin and tropomyosin
(11)
Which of the following factors does not influence success in sport?
[A]
ability to tolerate heavy training without succumbing to illness or injury
[B]
tactics
[C]
the diet
[D]
ingestion of carnitine during exercise
Answer: ingestion of carnitine during exercise
(12)
Endurance training increases the muscle’s capacity to:
[A]
contract faster
[B]
breakdown phosphocreatine
[C]
burn fat and carbohydrate
[D]
generate energy anaerobically
Answer: burn fat and carbohydrate
(13)
Women’s world record performances have improved rapidly in recent years mainly because:
[A]
women have evolved a greater muscle mass
[B]
women can now run faster than men
[C]
women have started training at an earlier age
[D]
more women are now engaged in sport
Answer: more women are now engaged in sport
(14)
In sprint events, improvements in performance may come from:
[A]
faster reaction times
[B]
increased power generating ability of muscles
[C]
improved resistance to fatigue
[D]
all of the above
(15)
Metabolism is determined by the:
[A]
size of proteins in the cell
[B]
availability of amino acids
[C]
proteins formed as dictated by the genetic material
[D]
protein composition of the DNA
Answer: proteins formed as dictated by the genetic material
(16)
Which of the following is an amino acid that is found in proteins?
[A]
adenosine
[B]
adenine
[C]
alanine
[D]
linoleic acid
(17)
Which of the following factors can affect enzyme activity?
[A]
temperature
[B]
pH
[C]
the presence of certain metal ions
[D]
all of the above
(18)
Prosthetic groups are:
[A]
required by all enzymes in the cell
[B]
loosely bound to enzymes via hydrogen bonds
[C]
sites on the enzyme molecule that permit allosteric modification of enzyme activity
[D]
tightly bound to enzymes and are required for their activity
Answer: tightly bound to enzymes and are required for their activity
(19)
The initial rate of an enzyme catalysed reaction depends on:
[A]
the concentration of the enzyme
[B]
the concentration of the substrate
[C]
the affinity of the enzyme for its substrate
[D]
all of the above
(20)
Kinase reactions:
[A]
inhibit ATP breakdown
[B]
involve the addition or removal of a phosphate group
[C]
involve the addition or removal of a ketone group
[D]
involve the addition or removal of an amino acid to a polypeptide chain
Answer: involve the addition or removal of a phosphate group
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