Question

Which of the following statements is / are correct?
I. Relative abundance of carbon and hydrogen with respect to other elements is higher in any living organisms.
II. Living organism have more nitrogen and oxygen per unit mass than inanimate objects (e.g.earth crust)
III. All the elements present in a sample of earth's crust are also present in a sample of living tissue.
IV. Living organisms have more Ca, Mg, Na in them than inanimate objects.

• A. All of these
• B. All except IV
• C. Only IV
• D. None of these

Answer 1

The correct option is B All except IV

Various mineral elements present in living organisms include (i) major elements, and they are:-

Carbon (C), nitrogen (N), oxygen (O), hydrogen (H), phosphorus (P), calcium (Ca), magnesium (Mg), sodium (Na), potassium (K) and chlorine (Cl) and

(ii) trace elements, and they are:-

Iodine (I), iron (Fe), manganese (Mn), cobalt (Co), copper (Cu), zinc (Zn), molybdenum (Mo), boron etc.