Multiple Choice QuestionsCytochromes are found in
matrix of mitochondria
outer wall of mitochondria
cristae of mitochondria
cristae of mitochondria
C.
cristae of mitochondria
Cytochromes are present on the cristate, i.e. inner foldings of mitochondria. Cytochromes are iron (heme) containing proteins primarily responsible for transfer of electrons in ETC from ubiquinone to complex-V for generation of ATP(energy molecules) and terminal acceptor O2 in electron transport chain.
They are also called respiratory pigments, which are capable of performing both the oxidation and reduction reactions.
Which one of the following statements in incorrect?
A competitive inhibitor reacts reversibly with the enzyme to form an enzymeinhibitor complex
In competitive inhibition, the inhibitor molecule is not chemically changed by the enzyme.
The competitive inhibitor does not affect the rate of breakdown of the enzymesubstrate complex.
The competitive inhibitor does not affect the rate of breakdown of the enzymesubstrate complex.
A somatic cell that has just completed the S phase of its cell cycle, as compared to gamete of the same species, has
twice the number of chromosomes and four times the amount of DNA
same number of chromosomes but twice the amount of DNA
twice the number of chromosomes and four times the amount of DNA
twice the number of chromosomes and four times the amount of DNA
Which of the following statements is not correct?
Brunner's glands are present in the submucosa of stomach and secrete pepsinogen
Goblet cells are present in the mucosa of intestine and secrete mucus
Oxyntic cells are present in the mucosa of stomach and secrete HCl.
Oxyntic cells are present in the mucosa of stomach and secrete HCl.
Gastric juice of infants contains
maltase, pepsinogen, rennin
nuclease, pepsinogen, lipase
pepsinogen, lipase, rennin
pepsinogen, lipase, rennin
When you hold your breath, which of the following gas changes in blood would first lead to the urge to breathe?
Falling O2 concentration
Rising CO2 concentration
Falling CO2 concentration
Falling CO2 concentration
Blood pressure in the mammalian aorta is maximum during
systole of the left atrium
diastole of the right ventricle
systole of the left ventricle
systole of the left ventricle
Which one of the following is correct?
Plasma = Blood – Lymphocytes
Serum = Blood + Fibrinogen
Lymph = Plasma + RBC + WBC
Lymph = Plasma + RBC + WBC
Removal of proximal convoluted tubule from the nephron will result in
more diluted urine
no change in quality and quantity of urine
no change in quality and quantity of urine
Sliding filament theory can be best explained as
When myofilaments slide pass each other actin filaments shorten while mysoin filament do not shorten
Actin and Myosin filaments shorten and slide pass each other
Actin and Myosin filaments do not shorten but rather slide pass each other
Actin and Myosin filaments do not shorten but rather slide pass each other
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