Of the following four 15-bp double-stranded DNA sequences, which will be most stable at higher temperatures? (In other words, which will most likely remain in a double-stranded form?) (Note: only one strand is shown here) 1 point
CCCGCATCGCCATCG
AAATGCATACATCTT
CTATACGACATAGCC
CATCCTAGCGACTAT

tttccgugdfhhsvhsfghc

explanation:

yooptfrhtr

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.