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BSC 108 Exam 3 Questions with Detailed Verified Answers

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BSC 108 Exam 3 Questions with Detailed Verified Answers

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BSC 108 Exam 3 Questions with Detailed Verified
Answers




DNA is composed of ____ subunits. Ans: ✓ ✓ ✓ Nucleotide


DNA has a ____ backbone covalently bonded to _____-containing bases Ans: ✓ ✓ ✓ Sugar-
phosphate


Nitrogen


A DNA molecule contains how many strands of DNA?


These strands form what? This means that they are _____. Ans: ✓ ✓ ✓ 2


A double helix


Complementary


What are the nitrogen-containing bases? Ans: ✓ ✓ ✓ Adenine


Guanine


Thymine


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Cytosine


The nitrogen-containing bases of the two strands are held to each other by ____ Ans: ✓ ✓ ✓
Hydrogen bonds


Adenine always pairs with _____ Ans: ✓ ✓ ✓ Thymine


Cytosine always pairs with _____ Ans: ✓ ✓ ✓ Guanine


How does a molecule of DNA replicate? Ans: ✓ ✓ ✓ One parent molecule that has two
complementary strands separates


Each strand is used as a template to make a new strand


Each of the two daughter molecules will be composed of one "old" (parent) strand and one "new"
strand


The two parent strands separate at the ____ Ans: ✓ ✓ ✓ Origin of replication


Synthesis of two new complementary strands occurs in the _____ using the ____ as templates Ans:
✓ ✓ ✓ Replication bubble


Parent strands


The replication bubbles merge as DNA replication progresses in both directions at the ______ Ans:
✓ ✓ ✓ Replication forks


An organism's DNA leads to specific traits by _____ Ans: ✓ ✓ ✓ Dictating the synthesis of proteins




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