What catalyzes the linkage between ribonucleotides to form RNA during gene expression?

In a eukaryotic cell, transcription takes place __________. 

Bacteria can transcribe and translate human genes to produce functional human proteins because __________. 

In many cases, more than one codon codes for the same amino acid. Because of this, we say that the code is __________.

How many nucleotides are needed to code for a protein with 450 amino acids?

The codons AAA, CCC, GGG, and UUU specify the amino acids lysine, proline, glycine, and phenylalanine, respectively. If the base sequence 5′-CCCAAATTTGGG-3′ is present in the coding strand of a stretch of DNA, what polypeptide sequence would be encoded by the corresponding template strand?

The number of nucleotide bases "read" together on the mRNA to designate each amino acid is __________; this unit is called a __________.

Generally speaking, how many genetic codes are there?

When RNA is being made, the RNA base __________ always pairs with the base __________ in DNA

Which statement is true?