The elongation of the leading strand during dna synthesis a) progresses away from the replication fork. b) occurs in the 3' → 5' direction. c) produces okazaki fragments. d) depends on the action of dna polymerase. e) does not require a template strand.

The only correct one is D - depends on the action of DNA polymerase.

A - no progresses towards the replication fork (the "fork" opens up as elongation moves towards it)

B - the DNA template is READ in the 3' - 5' direction, but it is BUILT in the 5' - 3' direction

C - Okazaki fragments are only made on the lagging strand (because it is hard to make the DNA on that strand

D - YEP

E - Absolutely requires a template strand (otherwise we wouldn't exist!)

satellites are frequently used to make observations of the orbit on earth

the nitrogen cycle provides nitrogen to the ecosystem from the atmosphere, ground and oceans. nitrogen is an important component of complex molecules such as amino acids and nucleotides, which lead to the creation of proteins and dna, the building blocks of all life. plants absorb nitrogen in the form of ammonium, nitrate ion and, on rare occasions, as amino acids. animals receive nitrogen necessary for biological processes from feeding on living or dead organic matter.