Exam2V1 - Biology 181R Dr Danny Brower and Ted Weinert Lecture Sections 11 and 12H Exam 2 Student Name Print last name first name A Use a Number 2

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

View Full Document Right Arrow Icon
Biology 181R October 30, 2007. Dr. Danny Brower and Ted Weinert Lecture Sections 11 and 12H Exam 2 S t u d e n t N a m e : . Print last name, first name. A. Use a Number 2 pencil. No pens or mechanical pencils. B. Print your last name and UA NetID in the space provided for you on the bubble sheet. (Your NetID is everything before the @ in your UA email address.) C. The bubble sheet is your official answer sheet. You can circle your answers in the examination booklet, but the answers in your bubble sheet will be graded. You must turn in your examination booklet and your bubble sheet. Above all, relax —this is just an exam, one more in your long and entertaining life. 1
Background image of page 1

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

View Full DocumentRight Arrow Icon
If you have any questions, be sure to ask- the worst that can happen is that we say we can’t answer your question. READ THE QUESTIONS CAREFULLY. Anything in parenthesis ( ) is there to help you understand the question; it is not what is being tested. 1. Each chromosome typically contains a single distinct double stranded molecule of DNA, proteins on the DNA like ribosomes, all wrapped around histones. F, not ribosomes, they are involved in translation-mRNA to protein step. 2. DNA in a eucaryotic cell is compacted (from 1 meter to 10 -5 meters). This structure needs to be unraveled during transcription. The unraveling is achieved by remodeling proteins. True. DNA is highly compacted, on nucleosomes (that consist of histones) and other proteins. Remodeling proteins take proteins off the DNA to allow RNA polymerase to get in there and transcribe. 3. Kinetichores are the structures on chromosomes to which actin filaments bind and cause chromosomes to move during mitosis. False. Microtubules, not actin, connect the mitotic center to each chromosome, and then the microtubules “pull” on the chromosomes to move them during mitosis. 4. Removal of a single base pair from the coding region of a gene is typically worse than removing three base pairs. False. One base pair alters “reading frame” of ribosome, 3 bases does not. .just deletes one amino acid. 5. A bacterial virus (bacteriophage) can integrate into the bacterial genome (lysogeny). It cuts itself out and undergoes a lytic cycle where it makes many copies of itself and lysis the cell (lytic cycle). The lysogenic cycle occurs during stress. False. Lytic cycle starts with stress- the virus cuts itself out, makes more, and goes off to infect a hopefully less-stressed cell! 6. The meiotic and mitotic chromosome dance performed by Dr. Ted and students in class was the most enlightening experience of my life. True. ‘Nuff said. 7. The white cell (ws-) mutation is a recessive autosomal mutation in Drosophila (fruit flies) that causes white spots on the body. If a heterozygous Ws+ ws-
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 04/02/2008 for the course BIO 181R taught by Professor Browser during the Spring '08 term at University of Arizona- Tucson.

Page1 / 6

Exam2V1 - Biology 181R Dr Danny Brower and Ted Weinert Lecture Sections 11 and 12H Exam 2 Student Name Print last name first name A Use a Number 2

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online