Bis101_Quiros_Fall2000_Midterm2

Bis101_Quiros_Fall2000_Midterm2 - NAME: Last, First ID# (6...

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NAME: ID# Last, First (6 last digits only) BIS101-2 Fall 2000 MIDTERM 2 SHOW ALL WORK TO GET FULL CREDIT . Authorization for Public Distribution of Graded Examination and grade posting by 6 last digits of SS# I,____________________________ , ID#__________________________ authorize that after this exam is graded, it can be distributed in class or placed in a holding bin, labeled BIS 101-02, on the third floor of Briggs Hall. Also I authorize posting of my grade in the same location by the 6 last digits of my ID# 1
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MIDTERM 2 QUESTION VALUE SCORE 1 10 2 10 3 15 4 10 5 10 6 10 7 6 8 10 9 10 10 9 TOTAL 100 2
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1).(10 pts total) Briefly describe or answer, whatever applies, each of the following statements: a) What is a nucleosome and what are its components? (2 points) Octomer formed by 4 histones and 2 turns of DNA helix forming the chromatin in the chromosome b) Mention two functions of centromeres (2 points) 1) Holding sisterm chromatids together. 2) Site of spindle microtubule attachment for homologous chromosomes/ chromatids separation . c) What enzyme is involved in telomere replication and what is the main feature of this enzyme? (2 points) Telomerase, which is a riboprotein. It carries RNA that serves as a primer for DNA synthesis at the ends of the chromosomes . d) State the Central Dogma of genetics? (2 point) DNA ----> RNA----> protein e) Who proposed the postulate "1 gene 1 enzyme"? (2 points) Beadle and Tatum 2) (10 pts) An analysis of a nucleic acid molecule indicates that the base thymine is present. No other information is available about the structure or composition of the molecule. a. (1 pt) What kind of sugar would you expect to find in the nucleotides of this molecule? deoxyribose
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This note was uploaded on 04/16/2008 for the course BIO SCI bis 101 taught by Professor Quiros during the Winter '97 term at UC Davis.

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Bis101_Quiros_Fall2000_Midterm2 - NAME: Last, First ID# (6...

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