QuickLinks -- Click here to rapidly navigate through this document

Exhibit 23.1

Consent of Independent Registered Public Accounting Firm

We consent to the reference to our firm under the caption "Experts" and to the use of our report dated March 29, 2007 in the Registration Statement on Form S-1 and related Prospectus of Quark Biotech, Inc. dated March 30, 2007.

	/S/ KOST FORER GABBAY & KASIERER
Tel-Aviv, Israel March 30, 2007	KOST FORER GABBAY & KASIERER A Member of Ernst & Young Global

QuickLinks

Consent of Independent Registered Public Accounting Firm