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BSC 108 Exam #3 (Kennedy) 2025 Questions and Answers What is DNA composed of? - ....ANSWER ...-Nucleotide subunits What substance makes up the backbone of DNA? - ....ANSWER ...-Sugar- phosphate, made of a sugar called deoxyribose and a phosphate group. How many strands of DNA does a DNA molecule contain? - ....ANSWER How are the nitrogen bases held together in DNA? - ....ANSWER ...-Two ...-Hydrogen bonds What are the two pairs of nitrogen bases in DNA? - ....ANSWER ...-Adenine & Thymine (A = T) Guanine & Cytosine (G = C) How does DNA replicate? - ....ANSWER ...-One parent molecule separates into two complementary strands, each strand is used as a template to make a new strand, and each daughter molecule will contain one old strand and one new strand. How many strands does RNA have? - ....ANSWER Does RNA contain thymine? - ....ANSWER Does RNA contain deoxyribose? - ....ANSWER ...-One ...-No, it contains uracil. ...-No, it contains ribose. …FOR STUDENTS ONLY…©️2025 ALL RIGHTS RESERVED… 1