Entamoeba histolytica differs from Amoeba in absence of
pseudopodia
contractile vacuole
nucleus
ectoplasm
Which of the following is important for muscle contraction and nerve impulse transmission?
Ca2+ ions
Ca2+ and Mg2+ ions
Mg2+ ions
Fe2+ ions
Which one is component of Ornithine cycle?
Ornithine, citrulline and alanine
Ornithine, citrulline and arginine
Amino acids are not used
Ornithine, citrulline and fumaric acid
In parasympathetic nervous system, which of the following is released?
Epinephrine
Norepinephrine
Serotonin
Acetylcholine
Which compound has a very important role in prebiotic evolution?
Sulphur dioxide
Nitric oxide
Methane
Sulphur trioxide
C.
Methane
JBS Haldane (1920) used the term Prebiotic soup or hot dilute soup of organic substances for oceanic water containing mixture of simple organic compounds. Methane (CH4) was probably the first organic compound and hydrogen cyanide was formed later.
The velocity of conduction of nerve impulse in frog is
300 m/s
same as of electricity
faster than sound
30 m/s