With regard to mitochondrial DNA:
A. Each mitochondrion has only one, circular DNA.
B. The mitochondrial DNA molecule of animals is larger than that of plants.
C. Each mitochondrion has multiple, circular DNAs.
D. The nucleic acid in mitochondria is actually RNA.
E. Mitochondrial DNA codes for 95% of the proteins needed in the mitochondria.
C
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Which of the following groups of photosynthetic bacteria are capable of oxygenic photosynthesis?
A. The cyanobacteria B. The purple bacteria C. The green bacteria D. All of the choices are correct.
Which of the following functions does the stomach perform the LEAST? a. absorption b. digestion c. storage d. mixing e. movement
Why is human blood clotting factor VIII produced by genetically engineered bacteria better to treat
hemophilia type A than the clotting factor isolated from human or animal blood? a. Recombinantly produced clotting factor has a longer shelf life than natural clotting factor. b. Clotting factor isolated from blood can transmit infectious agents. c. Clotting factor isolated from human blood can cause transfusion reactions. d. Recombinantly produced clotting factor is free of blood thinning factors. e. Natural clotting factor from blood is not very active.
The citric acid cycle is a series of oxidation reactions that removes carbon atoms from substrates in the form of CO2. Where do the oxygen atoms in the carbon dioxide molecules come from?
(a) water (b) phosphates (c) molecular oxygen (d) acetyl CoA