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BSC 108 Exam 3 Kennedy 2025 Questions and Answers The structure of a strand of DNA. - ....ANSWER ...-it is a double helix, like a twisted ladder. the ladder rings are nucleotide subunits and they have a covalent bond to the sugar phosphate backbone (made of deoxyribose and a phosphate group) What are the nucleotide subunits? - ....ANSWER ...-adenine, guanine, cytosine, and thymine How are the subunits held together? - ....ANSWER ...-through a hydrogen bond What are the nucleotide subunits compliments? - ....ANSWER ...-Adenine and thymine cytosine and guanine How does DNA replicate? - ....ANSWER ...-the parent strand breaks off into two and then enzymes (DNA polymerases) attach the complimentary nucleotide to each side, creating two separate daughter strands What is the location site of where DNA replication begins on the double helix called? ....ANSWER ...-the origins of replication …FOR STUDENTS ONLY…©️2025 ALL RIGHTS RESERVED… 1