BIO 1362 - Spring 2009 - Test 1

BIO 1362 - Spring 2009 - Test 1 - You scored 81.192 out of...

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You scored 81.192 out of 107.502 #39 CORRECT Question 1 Your answer is CORRECT. The experiments of Watson, & Crick A) "^ showed that proteins are the molecules of inhertance. revealed the double helical structure of DNA. C) resulted in the one gene : one enzyme hypothesis. D) demonstrated how DNA is replicated. Question 2 Your answer is CORRECT. A picture of the DNA double helix is shown with locations labeled "A" and "B". From the pairings below, which feature is not correctly matched with the proper location ("A" or "B")? A) A: sugar-phosphate backbone B)^ B: hydrogen bonding occurs here
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(C) P A: site of complimentary base pairing x_X-«i D) B: the bases, adenine, guanine, cytosine, and thymine are found here E)^ Choices A-D are all correctly matched. Question 3 Your answer is CORRECT. Which of the following best describes semiconservative replication? A) Following replication, both DNA molecules consist of two new (daughter) strands. (B)^ Following replication, both DNA molecules consist of one parental strand and one new (daughter) strand. C) The number of DNA molecules is doubled with every other replication. D) ^ The replication of DNA never takes place with 100% accuracy. E) ^ The replication of DNA takes place at a defined period in the cell cycle. Question 4 Your answer is CORRECT. Which statement regarding DNA is correct? Synthesis of DNA during replication always occurs 5'to 3'. B) ^ The DNA strands of the double helix are arranged such that the sugar-phosphate backbone is in the interior of the molecule with the bases facing outward, away from interior. C) DNA synthesis in a replication bubble occurs only in one direction from the origin D) " The information in DNA is contained in a code specified by the phosphodiester bonds. E) ^ The synthesis of DNA in which deoxyribonucleotides are linked together is the function of helicase and single stranded binding proteins. Question 5 Your answer is CORRECT. What is the role of RNA during DNA replication? A) *-* RNA is a permanent component of the newly synthesized DNA molecule. B) The RNA is translated into protein. fc) V It's there because DNA polymerase can only add deoxyribonucleotides to a free 3' ^9H end of an existing polynucleotide strand. D) L RNA strands function to link together newly made DNA fragments. E) ^ All of the above (A-D) are reasons why RNA is incorporated into DNA. Question 6 Your answer is CORRECT.
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The diagram shows a replication bubble. Which newly copied DNA strands, indicated by A, B, C, and D, represent the lagging strands? Question 7 Your answer is CORRECT. Some of steps of DNA replication are listed below; choose the response in 1-5 that has these in the correct sequence. 1. DNA polymerasc synthesizes DNA tV 7 % \ $ 2. Repiicaiion bubble forms 3. RNA primers formed 4. Unwind DNA double helix at origin of replication 5. DNA ligase activity
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B) E 4,2,3,1,5 Question 8 Your answer is CORRECT.
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