#Question id: 12052
#Unit 7. System Physiology – Animal
#Question id: 513
#Unit 1. Molecules and their Interaction Relevant to Biology
Arsenite
A) poisons by the same mechanism as arsenate.
B) is less toxic than arsenate.
C) binds tightly to lipoamide sulfur atoms.
#Question id: 1233
#Unit 4. Cell Communication and Cell Signaling
Transphosphorylation (cross-phosphorylation) of receptor tyrosine kinases
a. inhibits catalytic activity.
b. promotes transphosphorylation of additional tyrosine residues.
c. triggers release of the ligand.
d. generates binding sites for signaling molecules.
#Question id: 28740
#Unit 2. Cellular Organization
Which of the following is a major sites of oxygen utilization ?
#Question id: 10215
#Unit 6. System Physiology – Plant
Chloroplast movement is widespread among algae, mosses, and leaves of higher plants, what will be the orientation of chloroplast in dark as well as in light?
a.) In dark, chloroplasts gather at the cell surfaces parallel to the plane of the leaf so that they are aligned perpendicularly to the incident light
b.) Under high light, , the chloroplasts move to the cell surfaces that are parallel to the incident light, thus avoiding excess absorption of light
c.) the orientation of the chloroplasts in the dark is such that maximizes absorption of light
d.) the orientation of the chloroplasts in the high light is such that maximizes absorption of light
Which of the following statements is correct?