What is the importance of the nitrogenous bases in DNA having relatively weak hydrogen bonds connecting them?

A. They are flexible to wrap around histones
b. They can be separated easily
c. They will bond easily with the sugar-phosphate backbone
d. The type of bond tells the DNA polymerase which pair it is

PLEASE HELP ME AS SOON AS POSSIBLE im almost to a 90!

Photosynthesis converts light energy to chemical energy. which molecules are the end product of this transformation of energy in this reaction?

Which of the following is true of microbes? a. ninety-nine percent of all microbes are pathogenic. b. gene expression in bacteria is very similar to gene expression in humans, which facilitates the use of bacteria in recombinant biotechnology and gene therapy. c. all bacterial enzymes are harmful to humans and the environment. d. microbes create pollutants and toxins that harm the environment.

In the respiration-photosynthesis cycle shown above, what are the products of cellular respiration that belong in box 2?