The generation of ATP by the movement of protons down their concentration gradient, occurs in:
a) mitochondria.
b) chloroplasts.
c) Golgi apparatus.
d) Both a) and b) are correct.
e) a), b), and c) are correct.
Ans: d) Both a) and b) are correct.
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Compared to uric acid, using urea as the main form of nitrogenous waste requires
a. more energy and water. b. less energy and water. c. more energy and less water. d. the same amount of energy and water. e. less energy and more water.
Why do transcription and translation take place in two different locations?
A) DNA is located in the nucleus, whereas the ribosomes needed for translation are not in the nucleus. B) DNA is located in the nucleus, whereas the ribosomes needed for translation are found outside the cell. C) DNA is located in the nucleus, whereas the ribosomes needed for transcription are found outside the cell. D) Translation takes place in the nucleus, whereas the DNA is located elsewhere.
A tumor in an endocrine gland caused Jane to have weakened bones and unusually high levels of blood calcium. Which gland was affected?
A) parathyroid gland B) pancreas C) bone marrow D) pituitary gland
A scale used to indicate the strength of an acid or base is called a ____ scale.
A. thermodynamic B. aquatic C. pH D. reduction