MediumNEET TEST
+4 / -1
Read the following statements. A. There is a wide diversity in living organisms in our biosphere. B. Few elements present in a sample of earth’s crust are present in a sample of living tissue. C. All the carbon compounds that we get from living tissues can be called biomolecules. D. Co-enzymes associate with the apoenzyme transiently, usually during catalysis. E. Adenosine, guanosine, and uridine are examples of nucleotides found in nucleic acids. Select the correct combination of statements:
A
A, B, and D only
B
B, C, and E only
C
A, C, and D only
D
A, B, D, and E only
Explanation
The biosphere shows immense diversity—millions of species differing in structure, function, and habitat. All the elements present in living tissues are also present in the earth’s crust. Biomolecules are defined as carbon compounds obtained from living tissues (proteins, carbohydrates, lipids, nucleic acids). Coenzymes are organic cofactors that bind loosely and temporarily (transiently) to the apoenzyme during catalysis and then dissociate. Adenosine, guanosine, uridine = nucleosides (base + sugar only). Nucleotides = nucleoside + phosphate.
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