CORRECTIONS  CORRECTIONS  CORECTIONS     Intro Bio

Last Updated on 10/03/08       Most recent corrections are at the top   Corrections to problem book are in order of questions.

There are no corrections to lecture notes of Fall 2008, so far.

Corrections to lecture notes of Fall 2007

11/11/07 In Lecture 17, after topic II, it should say 'try problem 13-8A.' In III part D-1, it should refer to handout 17A, not 17B.

Problem Book, 18th ed., revised (2008) Corrections Listed in Order of Problems

10/3/08 Problem 4-13, part B -- Answer. No ATP is needed for reaction Y. ATP is only needed for reaction X. The two reactions together (X + Y) make up the top reaction shown in the box in the answer.  It is this combined reaction, not reaction Y, that uses up ATP.

The answer to part B is correct, but the explanation is not. To fix the explanation, add the words in blue to the first full sentence: 
It takes about 100 ATP to break down the glycogen and convert it to 100 molecules of PGAlde.  First the glycogen is broken down to glucose-P (Reaction Y). Each molecule of glucose -P is then converted to glyceraldehyde-P (Reaction X), yielding.......

Problem Book, 18th ed. (2007) Corrections Listed in Order of Problems

Note: All of these errors are fixed in the 18th ed, revised.

12/14/07 Problem 15-4 -- Answer. The answer to part C should be 1/4 X (0.42/0.91)². The decimal point before the 9 was accidentally omitted. 0.42/0.91= chance that a person with normal pheno will be carrier. Chance both (normal) parents will be carriers is (0.42/0.91)².

12/7/07 Problems 14-9 to 14-12. These are the problems that should be on page 122. We accidentally reprinted page 121 instead. The missing page is posted on Courseworks, under class files.

8/1/08    Problem 10-19, part B -- Answer. The RF (in %) = 10.2, not 10.5

7/31/08 Problem 10R-5, part B -- Answer. There is a typo in line 4 of the answer to part B. It says aB instead of ab. Yellow X red will give AB, aB, Ab, and ab (if AaBb) or AB and aB (if AaBB). 

10/11/07 Problem 4-13. Reaction X should be Glucose-P + ATP → 2 glyceraldehyde-3-P + ADP. The '2' is missing.

7/31/08   Problem 8R-3, part D -- Answer. The last paragraph of the answer should read 'The two chromosomes can line up two ways....' Delete the word 'homologous' -- this is a haploid organism and none of the chromosomes are homologous.

8/1/08 Problem 7-14. -- Answer. You need 3 lys-tRNA per ribosome, not 2, because the E site will not empty until the A site is filled. The answer in the older editions do not take the E site into account.

10/9/07 Problem Set 6 -- Answers: The answers to problem set #6 are missing -- the questions are repeated where the answers should be. The key to problem set 6 is posted on Courseworks, under class files.

Corrections & Updates for Older Editions of the Problem Book

If you have the 18th edition (2007), all the major corrections in the revised edition are listed above.  

If you have the 17th edition, revised (2005) Click here for updates to 18th edition.

If you have the 17th edition (2004) , Click here for corrections & updates.

If you have the 16th edition, revised (2003), click here for corrections & updates. 

If you have the 16th edition (2002), click here or corrections & updates. 

If you have an older edition, click here for corrections & updates. 

Texts:

Purves (6th ed.):
2)  The definition of an exon given in the glossary of the Purves text is incorrect.   Similarly, the depiction of exons in Fig. 14.6 could be misleading in that it fails to show the presence of untranslated regions in the first and last exons (before the translation start codon and following the translation termination codon).

1) There are errors in the structures of mannose in the Purves text Fig. 3.12, p.44.   For mannose, there should be an H pointing down from position 2, not an OH.

Purves text (5th ed.) :

2) The definition of an exon given in the glossary of the Purves text is incorrect. The definition given in the text of Purves (p. 314, col. 2, para.1) is correct.

1) There are errors in the structures of mannose and fructose in the Purves text Fig. 3.11, p.48. For mannose, there should be an H
pointing down from position 2, not an OH. In fructose, there should be an OH above the ring on carbon 2 and an OH above the ring on carbon 3.

Becker text (4th ed.)

None found

Becker (old 3rd edition only):

Fig. 15-11 in Becker implies that simultaneous removal of primer and its replacement occurs without adding on to the 3' end of the next fragment. This is an error. In panels 6 & 7 of fig. 15-11, DNA pol I should be extending fragment #2 on the lagging strand to replace the primer on fragment #1. There should be no gap between fragments 1 & 2. Figure 15-9 has a primer being removed incorrectly too.