1. The DNA strand that is synthesized continuously is called the lagging strand.
ID: 9301 • Letter: 1
Question
1. The DNA strand that is synthesized continuously is called the lagging strand.
2. The DNA strand that is synthesized discontinuously is called the leading strand.
3. DNA ligase joins adjacent Okazaki fragments together into a complete strand.
4. DNA polymerases cannot initiate synthesis of a new DNA strand; they can only add bases to an existing strand.
5. DNA polymerase I removes the RNA primer and synthesizes a short sequence of DNA that will base pair with the parent strand of DNA.
Explanation / Answer
1) The DNA strand that is synthesized continuously is called the lagging strand. FALSE The lagging strand is synthesized discontinuously. 2) The DNA strand that is synthesized discontinuously is called the leading strand. FALSE The leading strand is synthesized continuously. 3) DNA ligase joins adjacent Okazaki fragments together into a complete strand. TRUE 4) DNA polymerases cannot initiate synthesis of a new DNA strand; they can only add bases to an existing strand. TRUE 5) DNA polymerase I removes the RNA primer and synthesizes a short sequence of DNA that will base pair with the parent strand of DNA. TRUE (I am not positive about the second part pf the question but DNA Polymerase I does indeed remove the RNA primer)
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