Blue light activates a proton pump at the guard cell plasma membrane. The relationship between proton pumping at the guard cell plasma membrane and stomatal opening is evident from the observations that;

 a.) Orthovandate inhibits the fusicoccin-stimulated opening

 b.) fusicoccin stimulates both proton extrusion from guard cell protoplasts and stomatal opening

 c.) CCCP inhibits the fusicoccin-stimulated opening

 d.) CCCP, a proton ionophore that makes the plasma membrane highly permeable to protons resulting stomatal opening

 Which one of the following observation from the above statements should  be correct?

TLS Online TPP Program

#Question id: 2714

#Unit 2. Cellular Organization

HAT enzymes react with the side-chain of lysine to form the following structure. What effect will the HAT enzymes have on histones?

TLS Online TPP Program

#Question id: 3998

#Unit 3. Fundamental Processes

Which of the following is an incorrect association between RNA polymerase and its products?

TLS Online TPP Program

#Question id: 11781

#Unit 7. System Physiology – Animal

A 40-year-old woman comes to the emergency room with a fracture in the neck of the femur. Radiographs reveal generalized demineralization of the bone in the area. Her plasma calcium ion concentration is significantly greater than normal: 12.2 mg/dL. Which of the following conditions is consistent with this presentation?

TLS Online TPP Program

#Question id: 12025

#Unit 7. System Physiology – Animal

After surgical removal of an infected gallbladder, a person must be especially careful to restrict dietary intake of ________.

TLS Online TPP Program

#Question id: 15857

#Unit 12. Applied Biology

The ability of a plant cell to perform all the functions of development is called__