EXHIBIT 12.1   CERTIFICATION
 
 I, Asaf
Ben-Arye, Chief Executive Officer of Cell Kinetics Ltd., certify
that:
  1.           I
have reviewed this annual report on Form 20-F of Cell Kinetics Ltd. (the
“Registrant”);
  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;
  3.           Based
on my knowledge, the financial statements and other financial information
included in this report, fairly present in all material respects the financial
condition, results of operations and cash flows of the registrant as of, and
for, the period presented in this report;
  4.           The
registrant’s other certifying officer and I are responsible for establishing and
maintaining disclosure controls and procedures (as defined in Exchange Act Rules
13a-15(e) and 15d-15(e) for the registrant and have:
  a)           Designed
such disclosure controls and procedures, or caused such disclosure controls and
procedures to be designed under our supervision, to ensure that material
information relating to the registrant, including its consolidated subsidiaries,
is made known to us by others within those entities, particularly during the
period in which this report is being prepared;
  b)           Designed
such internal control over financial reporting, or caused such internal control
over financial reporting to be designed under our supervision, to provide
reasonable assurance regarding the reliability of financial reporting and the
preparation of financial statements for external purposes in accordance with
generally accepted accounting principles;
  c)           Evaluated
the effectiveness of the registrant’s disclosure controls and procedures, and
presented in this report our conclusions about the effectiveness of the
disclosure control and procedures as of the end of the period covered by this
report based on such evaluation; and
  d)           Disclosed
in this report any change in the company’s internal control over financial
reporting that occurred during the period covered by the annual report that has
materially affected, or is reasonably likely to materially affect, the company’s
internal control over financial reporting; and
  5.           The
registrant’s other certifying officers and I have disclosed, based on our most
recent evaluation of internal control over financial reporting, to the
registrant’s auditors and audit committee of the board of directors (or persons
performing the equivalent function):
  a)           All
significant deficiencies and material weaknesses in the design or operation of
internal control over financial reporting which are reasonably likely to
adversely affect the registrant’s ability to record, process, summarize and
report financial information; and
  b)           any
fraud, whether or not material, that involves management or other employees who
have a significant role in the registrant’s internal controls over financial
reporting.
    Date:
      June 30, 2009
                        /s/ Asaf
      Ben-AryeAsaf
      Ben-AryePresident
      and Chief Executive Officer
                          (principal
      executive officer)