The holozyme is formed when the core enzyme associates with
A. Start codons
B. b
C. b'
D. ?
E. a
D
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In a medical emergency, when an individual has stopped breathing on their own, mouth-to-mouth resuscitation can be administered while waiting for the arrival of EMTs, in order to increase that individual’s odds of survival. In order to perform mouth-to-mouth resuscitation, air from a conscious individual’s lungs is forced into the lungs of the unconscious individual. What effect does this have?
a. Forcing air into the unconscious individual’s lungs triggers the sympathetic breathing reflex, whereby the lungs ”remember” to start breathing again. b. Mouth-to-mouth resuscitation prevents the unconscious individual from exhaling their residual volume, which would cause the lungs to collapse and lead to inevitable death. c. Some residual oxygen from the conscious individual’s lungs diffuses into the unconscious individual’s blood, and the increased pressure forces some CO2 saturated air out of their lungs. d. Mouth-to-mouth resuscitation keeps the alveoli of the lungs moist and warm, allowing the lungs to continue exchanging gases with the atmosphere on a passive but adequate level.
Sponges are mostly found in ________.
A. fresh water ecosystems B. marine ecosystems C. both marine and fresh water ecosystems D. neither marine nor fresh water ecosystems
XY individuals with total androgen
insensitivity syndrome
a. do not secrete testosterone. b. secrete testosterone but the testosterone is ineffective. c. have mutated testosterone receptors in their cells. d. secrete more estrogen than testosterone. e. have normal male genitalia
Very high concentrations of ____ accumulates in large predatory fishes such as swordfish, bluefin tuna, and albacore
tuna, which may cause developmental abnormalities when consumed by pregnant women.
a. methylmercury b. DDT c. sulfur dioxide d. chlorofluorocarbon (CFC) e. ozone gas