Q. Given below is a comparison of elements present in non-living and living matter. Which of these is incorrect?
Solution:
Calcium, carbon and nitrogen are very important molecules for the human body. Calcium does many functions, including the muscle contraction and nerve conduction at the synapse. Carbon is one of the major element which is required to form almost all the biomolecules. Nitrogen is a very important component of nucleic acids and proteins. Silicon doesn't have many functions in the body and present in a very negligible amount.
i) Calcium is about 3.6% in Earth's crust and 1.5% in the human body.
ii) Silicon is about 27.7% in Earth's crust and negligible in the human body.
iii) Carbon is about 0.03% in Earth's crust and 18.5% in the human body.
iv) Nitrogen is very little in Earth's crust and 3.3% in the human body.
i) Calcium is about 3.6% in Earth's crust and 1.5% in the human body.
ii) Silicon is about 27.7% in Earth's crust and negligible in the human body.
iii) Carbon is about 0.03% in Earth's crust and 18.5% in the human body.
iv) Nitrogen is very little in Earth's crust and 3.3% in the human body.