Multiple Choice QuestionsPhototropic curvature is the result of uneven distribution of
gibberellin
phytochrome
cytokinins
cytokinins
Male and female gametophytes are independent and free - living in
mustard
castor
Pinus
Pinus
The technical term used for the androecium in a flower of China rose (Hibiscus rosa siensis( is
monadelphous
diadelphous
polyandrous
polyandrous
During mitosis ER and nucleolus begin to disappear at
late prophase
early metaphase
late metaphase
late metaphase
The free-living, anaerobic nitrogen - fixer is
Beijerinckia
Rhodospirillum
Rhizobium
Rhizobium
What is true about RBCs in humans?
They carry about 20-25 percent of CO2
They transport 99.5 percent of O2
They transport about 80 percent oxygen only and the rest 20 percent of it is transported in dissolved state in blood plasma
They transport about 80 percent oxygen only and the rest 20 percent of it is transported in dissolved state in blood plasma
The main arean of various types of activities of a cell is
Plasma membrane
mitochondrion
cytoplasm
cytoplasm
The principal nitrogenous exceretory compound in humans is synthesised
in kidneys but eliminated mostly through the liver
in kidneys as well as eliminated by kidneys
In liver and also eliminated by the same through bile
In liver and also eliminated by the same through bile
D.
In liver and also eliminated by the same through bile
In humans, the principal nitrogenous excretory compound (i.e, urea) is synthesised in the liver by ornithine cycle. In liver, one molecule of CO2 is activated by biotin and combines with two molecules of NH3 in the presence of carbamyl phosphate synthetase enzyme and 2ATP to form carbonyl phosphate reacts with ornithine and forms citrulline. Citrulline combines with another molecule of ammonia and forms arginine that is broken into urea and ornithine in the presence of an enzyme arginase and water. 
Urea is eliminated mostly through kidney as a nitrogenous excretory product.
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