Simple epithelial cells of the renal tubule have abundant __________ to increase the surface area for
reabsorption and numerous __________ to provide energy for actively transporting materials.
a. microvilli; mitochondria
b. cilia; mitochondria
c. microvilli; Golgi complexes
d. cilia; Golgi complexes
e. cilia; capillaries
A
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After acetyl-CoA synthesis, the chemical energy of how many carbons of the original glucose molecule will be converted to chemical energy in the form of ATP in the remaining steps of aerobic respiration?
A. 1 B. 2 C. 3 D. 4 E. 5
Which of the following statements about nuclear localization of proteins is not true?
A. Importin ? and importin ? form a cytosolic complex that interacts with proteins containinga nuclear localization signal. B. Ran-GTP binding is required for the recycling of both importin ? and importin ? back to the cytosol. C. Ran-GDP is transported from the nucleus to the cytosol.
tRNA molecules are able to act as adapters between amino acids and mRNA during translation because:a
tRNA binds to ribosomes. b. tRNA can bind to both mRNA and an amino acid. c. tRNA anticodons bind to amino acids. d. tRNA is recognized by RNA polymerase. e. tRNA molecules bind to promoter sequences to initiate transcription.
Nucleic acids are assembled in the ________ direction
Fill in the blank(s) with the appropriate word(s).