What percent
a. 14
b. 7
c. 43
d. 12
guanine
is there in dna sample #1?

In dna, only the_ varies from one nucleotide to another. base phosphate sugar amino acid

Amylase is an enzyme found in the human digestive system. why do you think it was important to keep the enzyme temperature about 37 degrees celsius (98.6 degrees f)? describe what might happened the temperature decreased by 10 degrees celsius.

Transmission electron microscope are best for viewing a) microorganisms in pond water b) internal organs of a mouse c)internal structures of a cell d) surface features of a specimen