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                              Q:
                           
                           
                                                      | A) They have a hydrogen at the 3’ carbon of the sugar. | B) DNA polymerase can add a new dNTP to a 3’ ddNTP. | 
| C) They have a free 3’-hydroxyl group on the ribose sugar. | D) They have an oxygen at the 2’ carbon of the ribose sugar. | 
                              Answer:   A) They have a hydrogen at the 3’ carbon of the sugar.
                              
                                                            
                              
Explanation:
                               
                           
                           Explanation:
ddNTPs - Dideoxynucleotides and abbreviated as ddNTPs.
They are chain-elongating inhibitors of DNA polymerase, used in the Sanger method for DNA sequencing.
They have a hydrogen at the 3’ carbon of the ribose sugar.
 
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