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Midterm

Midterm 2

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Department
Biology
Course
BIO1140
Professor
Doug Johnson
Semester
Winter

Description
NAME STUDENT BIO 1140 Introduction to Cell Biology MIDTERM 2 March 23 2013 Dr DA Johnson Total points on this exam is 32 ptsYOU HAVE ONE HOUR TO COMPLETE THIS EXAMMULTIPLE CHOICE QUESTIONNAIRE GG Instructions 1 Make sure that you have a complete test packageYou should have a set of multiple choice questions with a writtenanswer questionnaire and a ScantronBoth components must be returned at the end of the midterm 2 Fill in the Scantron with your name student number and course code BIO 1140 GGAnswer the following 16 multiple choice questions on the Scantron sheet providedChoose only one answer from among the choices16 marks1 DNA binding proteins often can read the sequence of nucleotides along the DNA without having to separate the chains How do they do this a The conformations of the phosphate groups reflect the DNA sequence b The conformations of the deoxyribose sugars reflect the DNA sequence c The conformations of the ribose sugars reflect the DNA sequenced The DNA binding proteins often contain domains that fit into the DNA grooves2 The two strands of a DNA double helix are said to be antiparallel This means that a the 5 end of one strand is directly paired with the 5 end of the other strand b since the double helix twists it is not perfectly parallel c one strand has a negative charge and the other strand has a positive charge d the 5 end of one strand is directly paired with the 3 end of the other strand3 In a righthanded double helix if one looks down the central axis of the moleculea each strand follows a clockwise path moving away from the observer b each strand follows a counterclockwise path moving away from the observer c each strand follows a counterclockwise path moving toward the observer d each strand follows a clockwise path moving toward the observer e one strand follows a clockwise path moving away from the observer the other follows a clockwise path moving toward the observe4 The DNA of an organism is studied and found to contain 30 adenine Based on this you would predict that the DNA of this organism also contains 30a thymine b cytosine c each of cytosine and guanine d each of thymine and guaninePage 1 of 6
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