BIO 325 Exam II Practice Questions

BIO 325 Exam II Practice Questions - Exam II Practice...

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Exam II Practice Questions 1. In an experiment we discussed in lecture, bacteria were cultured for several generations in a medium containing heavy nitrogen (N 15 ). They were then transferred to a medium containing light nitrogen (N 14 ) and DNA was extracted from some of the cells and centrifuged after one replication cycle and extracted from other cells and centrifuged after two replication cycles. This experiment proved that: (a) DNA is the genetic material, (b) DNA replication is conservative, (c) DNA replication is semiconservative, (d) DNA replication is dispersive, (e) choices “a” and “c” are both correct, but choices “b” and “d” are not correct. 2. A DNA nucleotide is composed of: (a) a nitrogenous base, (b) the sugar ribose, (c) a phosphate, (d) all of the above choices, “a”, “b”, and “c”, are correct, (e) choices “a” and “c” are both correct, but choice “b” is not correct. 3. Erwin Chargaff’s work led to what is known today as Chargaff’s Rule, which states that DNA has a biochemical composition in which: (a) the amount of A equals the amount of T and the amount of G equals the amount of C, (b) the amount of A equals the amount of G and the amount of T equals the amount of C, (c) the amount of A equals the amount of C and the amount of T equals the amount of G, (d) the amount of A + T equals the amount of G + C, (e) choices “a” and “d” are both correct, but choices “b” and “c” are not correct. 4. A single strand of RNA: (a) is composed of the bases adenine, uracil, guanine, and cytosine, (b) is composed of ribose sugars and phosphates, (c) can form double-stranded regions (e.g., stem loops) in which complementary bases
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This note was uploaded on 05/19/2011 for the course BIO 325 taught by Professor Saxena during the Spring '08 term at University of Texas at Austin.

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BIO 325 Exam II Practice Questions - Exam II Practice...

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