Question

16 multiple choice 2 points the enzyme responsible for \glueing\ together okazaki fragments is helicase polymerase nuclease ligase 17 multiple choice 2 points dna is always built in the ______ direction. 5 to 3 left to right 3 to 5 18 multiple choice 2 points a segment of dna that contains the coded instructions for a protein is called a(n) gene chromatid chromosome genome

Explanation:

1. DNA ligase catalyzes the formation of phosphodiester bonds between Okazaki fragments during DNA replication. Helicase unwinds DNA, polymerase synthesizes DNA, and nuclease cleaves nucleic - acids.
2. DNA polymerases can only add nucleotides to the 3' - OH end of a growing DNA strand, so DNA is always built in the 5' to 3' direction.
3. A gene is a segment of DNA that contains the coded instructions for making a protein. A chromatid is one of two identical copies of a replicated chromosome, a chromosome is a long DNA molecule with part or all of the genetic material of an organism, and a genome is the complete set of genetic material in an organism.

Answer:

1. D. ligase
2. A. 5' to 3'
3. A. gene