EXHIBIT 31 (f)

CERTIFICATIONS

I, Barry W.
Weiner, certify that:

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|-- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|1. | I have
reviewed this Amendment No. 2 to the Annual Report on Form 10-K of Enzo
Biochem, Inc.                                                                                                                                                                                                              
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|2. | Based on my
knowledge, this report does not contain any untrue statement of a material
fact or omit to state a material fact necessary to make the statements made,
in light of the circumstances under which such statements were made, not
misleading with respect to the period covered by this report.
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|3. | [Intentionally
omitted]*                                                                                                                                                                                                                                                                                  
|   |                                                                                                                                                                                                                                                                                                           
|4. | [Intentionally
omitted]*                                                                                                                                                                                                                                                                                  
|   |                                                                                                                                                                                                                                                                                                           
|5. | [Intentionally
omitted]*                                                                                                                                                                                                                                                                                  

|                        |  |     |                                                                                          | 
|----------------------- |  | --- | ---------------------------------------------------------------------------------------- | 
|Date:
December 11, 2009 |  |     |                                                                                          | 
|                        |  | By: | /s/ Barry W.
Weiner                                                                      | 
|                        |  |     |                                                                                          | 
|                        |  |     | Barry W.
Weiner                                                                          | 
|                        |  |     | President, Chief Financial
Officer, Principal
Accounting Officer,
Treasurer and Director | 

*Paragraphs 3 through 5 are
included in Exhibit 31(b) to the Annual Report on Form 10-K for the fiscal year
ended July 31, 2009. Please see Note 16 to the exhibits.

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