Toxic hydrogen peroxides resulting from intracellular oxidation reactions are catabolized by peroxisomes producing: a.ATPase b.Kinesin c.Catalase d.Kinase e.Polymerase

Red blood cells shrivel when placed in a 10% sucrose solution. When first placed in the solution, the solute concentration of the cell is______ the concentration of the sucrose solution. After the cells shrivel, their solute concentration is______ the concentration of the sucrose solution. A. Greater than... equal to B. Equal to... equal to C. Less than... greater than D. Less than... equal to E. Greater than... less than

A common starvation or generalized stress signal produced and sometimes secreted by bacterial, protistan, or fungal cells is   a. CAP b. cyclic ATP c. cyclic GTP d. cyclic AMP e. cyclic ADP f. glucose g. Lactic acid h. Ethanol or CO2

ATP hydrolysis is directly coupled to the movement of O a. glucose across the animal-cell plasma membrane O b. sucrose into the plant vacuole O c. Cl- and HCO3- across the erythrocyte membrane O d. Ca2+ to the extracellular medium or sarcoplasmic reticulum lumen.

The enzyme that converts 3-phosphoglycerate to 2-phosphoglycerate is a A. transferase. B. kinase. C. mutase. D. phosphorylase.

Scientists uncover a new pathway for synthesis of Threonine (see below).  They also identify mutants that cannot grow on media lacking threonine (Thr-1, 2 and 3). These mutants have mutations in separate enzymes in this pathway. They are able to grow when different supplements are added to the media (see below).  Based on this, what is the order of the enzymes in this pathway? a. Thr-2, 1, 3 b. Thr-2, 3, 1 c. Thr-1, 2, 3 d. Thr-3, 2, 1