#Question id: 5768
#Unit 8. Inheritance Biology
Exposure to gamma radiation leads to severe damage to DNA. The bacterium Deinococcus radiodurans is able to survive exposure to levels of gamma radiation that would kill any other known organism. This organism is able to survive because
#Question id: 1345
#Unit 4. Cell Communication and Cell Signaling
Embryos injected with antibodies to fibronectin show inhibited movement of neural crest cells during development of the nervous system. These experiments show that:
#Question id: 135
#Unit 1. Molecules and their Interaction Relevant to Biology
Concentrations of some proteins cannot be estimated by UV spectrophotometry because they are
#Question id: 15285
#Unit 5. Developmental Biology
#Question id: 2203
#Unit 2. Cellular Organization
Parietal cells acidify the stomach contents while maintaining a neutral cytosolic pH by:
a. exporting “excess” cytosolic OH– as HCO3–.
b. exchanging HCO3– for Cl–.
c. preserving electroneutrality by accompanying the movement of each Cl– ion into the stomach lumen by a K+.
d. the excess K+ ions pumped inward by the H+/K+ ATPase are returned to the stomach lumen, thus maintaining the normal intracellular K+ concentration.
Which of the following combination is correct?