You engineer yeast cells that express the M cyclin during S phase by replacing the promoter sequence of the M cyclin gene with t
hat of S cyclin. Keeping in mind that yeast cells have one common Cdk that binds to all cyclins, which of the following outcomes is least likely during this experiment? (a) There will be both M cyclin-Cdk and S cyclin-Cdk complexes in the cell during S phase.(b) Some substrates that are normally phosphorylated in M phase will now be phosphorylated in S phase.(c) G1 cyclins will be expressed during S phase.(d) S-Cdk targets will be phosphorylated during S phase.
The statement Bonds in the hydrogen peroxide are weakened in catalase's active site, allowing the chemical reaction to occur is the answer. Catalase is an enzyme in the liver that breaks down harmful hydrogen peroxide into oxygen and water.
