Which molecule associated with photorespiration is toxic to plant cells?
a. 3PGA
b. G3P
c. phosphoglycolate
d. glycolate
e. rubisco
ANSWER: d
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The regulation of blood sugar levels and our stress responses are controlled in part by a negative feedback loop involving cortisol, adrenocorticotropic hormone (ACTH), and corticotropin-releasing hormone (CRH)
What would likely be the result during times of stress if cortisol receptors in the hypothalamus were nonfunctional? A) Blood sugar levels would rise to dangerous levels. B) Blood sugar levels would be unaffected. C) ACTH production would cease. D) CRH production would cease. E) Cortisol production would cease.
Asexual reproduction occurs during _____
A) meiosis B) mitosis C) fertilization D) chromosome exchange between organisms of different species
Many proto-oncogenes encode
a. extracellular receptors. b. intracellular receptors. c. tumor suppressor proteins. d. protein kinases. e. extracellular receptors and protein kinases.
Osmoregulatory adjustment via the renin-angiotensin-aldosterone system can be triggered by _____
A) sleeping for one hour B) severe sweating on a hot day C) eating a pizza with olives and pepperoni D) drinking several glasses of water