Rna primer constructed during dna replication needs to be replaced because rna differs from dna. it instead . 1. adenine, cytosine, uracil 2. adenine, guanine, thime

Correct 1. adenine, cytosine, uracil

RNA is a polymer that consists of ribose sugar and phosphate backbone. The four different types of nitrogenous bases found in the RNA are adenine, guanine, cytosine, and uracil.

Structurally DNA and RNA are similar, One major difference between DNA and RNA is that RNA consists of ribose sugar instead of deoxyribose sugar in DNA. Another difference is that RNA possess Uracil instead of thymine in DNA.

Hence, the correct answer would be adenine, cytosine, uracil .

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.