14.1 RNA

RNA, like DNA, is a nucleic acid that consists of a long chain of _________.

Unlike DNA, RNA uses the sugar_______ instead of deoxyribose,

RNA generally is double stranded.

RNA contains _________ in place of thymine.

 RNA controls the assembly of amino acids into ________. 

The molecules of RNA that carry copies of these instructions from the nucleus to ribosomes in the cytoplasm are known as ____________.

Proteins are assembled on ribosomes, which are small organelles composed of two subunits. The subunits are made of several_________.

During the assembly of a protein, a third type of RNA molecule carries amino acids to the ribosome and matches them to the coded MRNA message. These molecules are known as____________.

In transcription, segments of DNA serves _______ to produce complementary RNA molecules.

transcription is carried out by an enzyme called RNA ____________.

RNA polymerase does not bind to DNA just anywhere. The enzyme binds only to __________, which are regions of DNA with specific base sequences that can bind to RNA polymerase.

The new RNA molecules some times require a bit of editing before they are ready to be read. The portions that are cut out and discarded  are called ____________.

In eukaryotes, introns are taken out of newly synthesized pre-mRNA molecules while they are still in the nucleus. The remaining pieces, known as __________, are then spliced back together to form the final mRNA.