Why do A and T (and G and C) pair in a DNA double helix?

Covalent bonds form between them.

Van der Waals forces are thus maximized.

Ionic interactions are thus maximized.

Hydrogen bonds form between them.

Which statement correctly describes a scientific theory?

How many atoms are there in 34.02 grams of hydrogen peroxide

A solution that is 33.6 % by mass of phenol (C6H5OH) in water is prepared. What is the mole fraction of the phenol?

Why are the zones common places for igneous rock to form?

What fact do scientists believe provides evidence for the big bang theory? a. all comets follow elliptical orbits. b. most extra-solar planets are gas giants. c. all stars feature nuclear fusion in their core. d.

Light from the sun is absorbed by the ground and converted to what?

What contains paired statements that can be used to identify orgainisms

The molecule below contains both an aldehyde and a ketone functional group. select only the carbonyl carbon atom of the aldehyde functional group. identify the carbon atom by selecting the atom and assigning it a map number of 1.

what is the volume of 0.98 mol oxygen (O2) gas at 275 K and a pressure of 2.0 atm? (the universal gas constant is 0.0821 L*atm/mol*K)

A student asks you for a simple rule to tell apart plants cells and animal cells when viewed under a microscope. Describe such a rule.