The final activation step for mcdk involves a b c d e

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Unformatted text preview: rten C) the zone of overlap between actin filaments and thick filaments in each sarcomere increases D) the distance between Z ­discs of each sarcomere lengthens E) none of the above 4. The FINAL activation step for M ­Cdk involves: A) B) C) D) E) 5. phosphorylation by CAK phosphorylation by Wee1 degradation of its CKI dephosphorylation by Cdc25 A and B Replication of chromosomal DNA is limited to once per cell cycle because: A) B) C) D) Cdc6 loading factor is degraded upon S ­Cdk activation S ­Cdk is active only during S phase ORC is bound to replication origins through the entire cell cycle there are many replication origins E) the Mcm helicase does not stay at replication origins 6. In response to DNA damage in G1, a cell arrests in G1 and/or undergoes apoptosis because p53: A) represses synthesis of S ­cyclin and promotes synthesis of BH1234 (class A) proteins B) promotes synthesis of a CKI for (G1/S ­ and) S ­Cdk complexes and promotes synthesis of certain BH3 ­only (class C) proteins C) promotes poly ­ubiquitination (and degradation) of S ­cyclin and promotes synthesis of certain BH3 ­only (class C) proteins D) promotes retention of Cdc25 in the cytosol and...
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