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BIOD 101 Module 4 Exam Portage learning
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BIOD 101 Module 4 Exam Portage learning
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Module 4 Problem Set●Due No due date
● Points 5
● Questions 21
● Time Limit None Question 1
Not yet graded / 0 pts
Compare and contrast purines and pyrimidines and provide examples of each.
Answer: Purines contain two carbon-nitrogen rings and four nitrogen atoms, while the pyrimidines contain one carbon-nitrogen ring and two nitrogen atoms. Adenine and guanine are purines, and thymine and cytosine are pyrimidines (See section 4.1 in module). Question 2
Not yet graded / 0 pts
Describe the structure and arrangement of DNA.
Answer: DNA is a double helix, which means it is composed of two helical
strands. The two strands are held together by the ‘rungs’, which are made
of complementary pairs. The pairs are held together by weak hydrogen bonds.
BIOD 101 MODULE 4 PROBLEM SET QUESTIONS AND ANSWERS Just as the nucleotides are paired in a complementary fashion, the strands are also arranged in a complementary-
type pattern and are said to be antiparallel. In this antiparallel arrangement, the strands are oriented with one strand being in the 5’→3’ orientation and the other strand in the 3’→5’ orientation (See section 4.1 in module). Question 3
Not yet graded / 0 pts
What is a genome?
Answer: The entire sequence of the paired bases is called a genome. Question 4 pts
Multiple Choice:
__________ is a broad term that includes all of the body’s cells except gametes.
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