Bio 142 Back Exam Set 2

Bio 142 Back Exam Set 2 - Practice Exam III Bio 142 Spring...

Info icon This preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Practice Exam III Bio 142 Spring 2009 Name___________________________________ MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) Semiconservative replication involves a template. What is the template? A) DNA polymerase contains the template needed. B) an RNA molecule C) one strand of the DNA molecule D) single-stranded binding proteins E) chromosomal proteins 2) Put the following steps of DNA replication in chronological order. 1. Single-stranded binding proteins attach to DNA strands. 2. hydrogen bonds between base pairs of antiparallel strands are broken. 3. Primase binds to the site of origin. 4. DNA polymerase binds to the template strand. 5. An RNA primer is created. A) 3, 2, 1, 5, 4 B) 1, 2, 3, 4, 5 C) 2, 1, 3, 5, 4 D) 1, 2, 3, 4, 4 E) 4, 3, 2, 1, 5 Figure 14.2 3) Identify the lagging strand in Figure 14.2. A) a B) b C) c D) d 4) What is a major difference between eukaryotic DNA replication and prokaryotic DNA replication? A) DNA polymerase III of eukaryotes has both endonuclease and exonuclease activity, while that of prokaryotes has only exonuclease activity. B) Prokaryotic replication does not require a primer. C) Prokaryotic chromosomes have a single origin of replication, while eukaryotic chromosomes have multiple origins of replication. D) DNA polymerases of prokaryotes can add nucleotides to both 3 ! and 5 ! ends of DNA strands, while those of eukaryotes function only in the 5 !" 3 ! direction. E) none of the above
Image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Figure 14.3 5) Refer to Figure 14.3. Which of the structures in the figure breaks hydrogen bonds between complementary bases? 6) Over expressing telomerase can be used to extend the life span of normal human cells. Telomere shortening puts a limit on the number of times a cell can divide. How might adding telomerase affect cellular aging?
Image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern