Which distinguishes anaerobic respiration from aerobic respiration?
A Anaerobic respiration requires oxygen, while aerobic respiration requires carbon dioxide.
B Anaerobic respiration produces little ATP, while aerobic respiration produces large quantities of ATP.
C Anaerobic respiration occurs in the mitochondria, while aerobic respiration occurs in the chloroplasts.
D Anaerobic respiration releases large amounts of carbon dioxide, while aerobic respiration releases large amounts of oxygen.
B Anaerobic respiration produces little ATP, while aerobic respiration produces large quantities of ATP.
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The most common form of hemophilia is a defect in blood clotting factor VIII, which is caused by a recessive form of a gene carried on the X chromosome. A girl is born with hemophilia. Both parents have normal phenotype
Which of the following might explain this girl's hemophilia? A. A nondisjunction event in sperm production resulted in her receiving X and Y chromosomes from her father, and an X from her mother; she is XXY. B. Nondisjunction during egg formation resulted in her receiving no X chromosome from her mother, but an X from her father; she is XO. C. Nondisjunction during sperm formation resulted in her receiving no sex chromosome from her father and an X chromosome from her mother; she is XO. D. Nondisjunction during egg formation resulted in her receiving two X chromosomes from her mother and an X chromosome from her father; she is XXX. E. She inherited an X chromosome from her father and the X carrying the defective allele from her mother.
Which of the following describes an accurate order of events in translation?
A. Ribosomal translocation occurs before the first aminoacyl-tRNA molecule binds to the small subunit. B. Initiation of translation occurs only after the small subunit dissociates from the mRNA. C. The large subunit of the ribosome binds the mRNA before the small subunit. D. The first aminoacyl-tRNA molecule binds to the small subunit before the large subunit binds.
Bacteria and protozoans ____
a. can be either unicellular or multicellular organisms b. reside solely in oceans c. are multicellular organisms d. are unicellular organisms e. are precursors to cells
The "language" of the genetic code of DNA uses an alphabet of
a. nucleotide bases. b. proteins. c. amino acids. d. sugars. e. phosphate molecules.