Teaching BPSC 4.0 बिहार उच्च माध्यमिक शिक्षक भर्ती (PGT) Mock Test General Science Biology Genetics and Evolution
The backbone of DNA is made up of ________, ________ and ________.
1
nitrogenous base, sugar and phosphate
2
phosphate, nitrogenous base
3
sugar, nitrogenous base
4
More than one of the above
5
None of the above