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Biology

Biology
Which of the following is the cellular respiratory centre?

Mitochondria
Nucleus
Golgi body
Ribosome

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Biology
Which one of the following phylum is characterised by absence of true coelom

Nematoda
Echinodermata
Annelida
Mollusca

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Biology
It is formed by a repeating nucleosome units ,which are closely attached to each other to a continuous fibre.

Chromatin
Centromere
DNA
Chromosome

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Biology
The brain is a part of which organ system

Nervous System
Circulatory System
Respiratory System
None of these

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Biology
The bone of the which organ is the longest in the human body ?

Thigh
Spinal cord
Rib cage
Ankle-bone

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Biology
In N2- fixation process, nitrite is converted to nitrate by

Azospirillum
Azotobacter
Nitrobacter
Nitosomonas

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