Chargaff's rules of base pairing helped scientists determine how DNA replication occurs. What property of the replication process is explained by Chargaff's rules?
A. The phosphate-sugar backbone of one strand serves as a template for the phosphate-
sugar backbone of the complementary strand.
B. The phosphate-sugar backbone of one strand serves as a template for the sequence of
four nucleotides in the complementary strand.
C. Adenine (A) and thymine ) are always paired together within a single DNA strand, as are
cytosine (C) and guanine (G).
D. Adenine (A) and thymine (1) always bind to each other across complementary strands, as
do cytosine (C) and guanine (G).
CA
B В
OD

is this a psat question, if so do not cheat try your best.

explanation:

the universal gravitation equation. since the gravitational force is directly proportional to the mass of both interacting objects, more massive objects will attract each other with a greater gravitational force. if the mass of one of the objects is doubled, then the force of gravity between them is doubled.

the correct answer is option d.

an appositive is a noun, noun phrase or noun clause which follows another noun or noun phrase in order to describe it or name it another way. they are usually used between commas, brackets or dashes.

the example sentence with the correct use of commas is the following:

her uncle, the man over there in the red shirt, owns the hardware store in town.