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Free download in PDF Biochemical Basis of Sports Performance 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.
81
The mode of action of a steroid hormone involves:
[A]
binding to a cell membrane receptor
[B]
activation of protein kinases
[C]
binding to calmodulin
[D]
modifying gene transcription
Answer: modifying gene transcription
82
Mutations are errors in DNA that:
[A]
are always harmful
[B]
only occur in the presence of carcinogens
[C]
increase tumour growth
[D]
occur spontaneously at a low rate
Answer: occur spontaneously at a low rate
83
The sex of a child is dictated by the inheritance of:
[A]
the number of X chromosomes from the mother
[B]
a recessive allele on the X chromosome
[C]
a single Y chromosome from the mother
[D]
a single Y chromosome from the father
Answer: a single Y chromosome from the father
84
The capacity of the aerobically trained muscle to use fatty acids as a fuel results in:
[A]
reduction in lactic acid formation
[B]
sparing of muscle glycogen
[C]
sparing of blood glucose
[D]
all of the above (a - c) are correct
Answer: all of the above (a - c) are correct
85
Training for strength or power has little effect on:
[A]
muscle mass
[B]
muscle strength
[C]
anaerobic capacity
[D]
aerobic capacity
86
Training for endurance has little effect on:
[A]
muscle mass
[B]
muscle triacylglycerol and glycogen content
[C]
mitochondrial content of muscle
[D]
aerobic capacity
87
Which of the following cannot be considered as a metabolic adaptation to endurance training:
[A]
increased maximal oxygen uptake
[B]
increased antioxidant capacity
[C]
increased maximal rate of fat oxidation
[D]
increased adrenaline response to exercise
Answer: increased adrenaline response to exercise
88
Prolonged exercise impairs immune cell function due to:
[A]
inhibitory effects of elevated stress hormones such as cortisol
[B]
a reduction in the number of circulating white blood cells during exercise
[C]
the removal of all the available glutamine from the circulation during exercise
[D]
the elevated body temperature promoting bacterial growth
Answer: inhibitory effects of elevated stress hormones such as cortisol
89
Which of the following immune functions would not be performed by a neutrophil?
[A]
antibody production
[B]
chemotaxis
[C]
phagocytosis
[D]
degranulation
Answer: antibody production
90
During prolonged exercise increased amounts of interleukin-6 are released from:
[A]
macrophages and cause suppression of other immune cell functions
[B]
lymphocytes and inhibit macrophage function
[C]
all muscles in the body and influence carbohydrate metabolism
[D]
exercising muscle and influence carbohydrate and fat metabolism
Answer: exercising muscle and influence carbohydrate and fat metabolism
91
Which amino acid is very important for optimal immune function and exhibits a reduced plasma concentration during heavy training?
[A]
glycine
[B]
glutamine
[C]
phenylalanine
[D]
isoleucine
92
Which of the following is not a dietary antioxidant?
[A]
vitamin C
[B]
lipoic acid
[C]
vitamin K
[D]
beta-carotene
93
The main source of increased free radical production during exercise is thought to be from:
[A]
electron leak from the sarcolemma
[B]
electron leak from the mitochondrial respiratory chain
[C]
electron leak from the sarcoplasmic reticulum
[D]
release of reactive oxygen species from haemoglobin and myoglobin
Answer: electron leak from the mitochondrial respiratory chain
94
Codons are composed of:
[A]
triplet sequences of nucleotide bases in mRNA
[B]
triplet sequences of nucleotide bases in DNA
[C]
triplet sequences of amino acids in polypeptide chains
[D]
triplet sequences of deoxyribose sugars in DNA
Answer: triplet sequences of nucleotide bases in mRNA
95
The process of translation requires the presence of:
[A]
mRNA, tRNA and ribosomes
[B]
mRNA, ribosomes and RNA polymerase
[C]
DNA, mRNA and RNA polymerase
[D]
chromatin, DNA and amino acids
Answer: mRNA, tRNA and ribosomes
96
The transcription of DNA to a molecule of messenger RNA occurs:
[A]
on the ribosomes
[B]
in the cytosol
[C]
in the nucleus
[D]
only during cell division
97
Which of the following molecules does not form part of DNA?
[A]
purine
[B]
pyrimidine
[C]
deoxyribose
[D]
amino acid
98
Which of the following nucleotide bases is not found in RNA?
[A]
thymine
[B]
adenine
[C]
uracil
[D]
guanine
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