Which of the following correctly identifies the proper nitrogen base pairing in DNA replication?

A:T;G:C

T:C;G:A

A:U; G:C

T:U; C: G

What links the two strands in a dna helix together in the middle? a. phosphate groups b. sugar rings bonded together c. proteins d. bases with hydrogen bonds

How does a lytic infection differ from a lysogenic infection?

Some birds look for food near cattle and other livestock. the movement of the cattle churns up the ground, making insects available to the birds. the cattle appear to be unaffected by the presence of the birds. what kind of relationship exists between the birds and the cattle? o a. parasitism o b. commensalism o c. predation o d. mutualism