For its action, nitrogenase requires
Options
(a) Mn²⁺ (b) light (c) high input of energy (d) super oxygen radicals
Correct Answer:
high input of energy
Explanation:
Nitrogenases are enzymes used by some organisms […]
In mitochondria, proteins accumulate in the
Options
(a) outer membrane (b) inner membrane (c) intermembrane space (d) matrix
Correct Answer:
inner membrane
Explanation:
The inner membrane of mitochondria contain more than 151 different […]
For its activity, carboxypertidase requires
Options
(a) zinc (b) iron (c) niacin (d) copper
Correct Answer:
zinc
Explanation:
Carboxypeptidase is an exopeptidase enzyme secreted by the pancreas that acts only on the peptide […]
Common cold is not cured by antibiotics because it is
Options
(a) caused by a virus (b) caused by a Gram-positive bacterium (c) caused by a Gram-negative bacterium (d) not an infectious disease
Correct […]
Which one of the following is essential for photolysis of water?
Options
(a) Manganese (b) Zinc (c) Copper (d) Boron
Correct Answer:
Manganese
Explanation:
Photolysis is catalysed by the portein-bound inorganic complex containing manganese […]
Which one of the following conditions of the zygotic cell would lead to the birth of a normal human female child?
Options
(a) Two X chromosomes (b) Only one Y chromosome (c) Only […]
The 24 hour (diurnal) rhythm of our body such as the sleep-wake cycle is regulated by the hormone:
Options
(a) calcitonin (b) prolactin (c) adrenaline (d) melatonin
Correct Answer:
melatonin
Explanation:
Melatonin is […]
At metaphase, chromosomes are attached to the spindle fibres by their:
Options
(a) satellites (b) secondary constrictions (c) kinetochores (d) centromere
Correct Answer:
kinetochores
Explanation:
Kinetochores are large protein complexes that bind the centromeres […]
The unequivocal proof with dominant material came from the studies on a
Options
(a) bacteriam (b) fungus (c) viroid (d) bacterial virus
Correct Answer:
bacterial virus
Explanation:
Bacteriophage was used by Hershey and […]
Which one of the following is not an essential mineral element for plants while the remaining three are?
Options
(a) Iron (b) Manganese (c) Cadmium (d) Phosphorus
Correct Answer:
Cadmium
Explanation:
Cadmium is […]
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