What is the difference between mitochondria and chloroplasts?
A. Mitochondria are oxidative metabolic bacteria derivatives and chloroplasts are photosynthetic bacteria derivatives.
B. Mitochondria have linear strands of DNA and chloroplasts have rings of DNA.
C. Mitochondria have three membranes and chloroplasts have two membranes.
D. Mitochondria produce oxygen and chloroplasts produce carbon dioxide.
Answer: A
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Where does cellular respiration occur?
A. In the chloroplasts B. In the mitochondria C. In the airways of the respiratory system D. In the nucleus
In eukaryotic cells, we sometimes find reverse transcriptase activity, even though the cells are not infected with virus. This activity can be attributed to
A) the presence of transposons integrating into polymerase genes. B) the presence of viroids. C) the presence of retrotransposons. D) infection with small bacteria known as mycoplasmas. E) a novel prion infection.
Colchicine is a drug that:a
arrests cells in mitotic telophase. b. stimulates meiosis. c. prevents DNA replication. d. arrests cells in mitotic metaphase. e. prevents cells from entering prophase.
Atmospheric nitrite, produced from the reaction of ________ and ________, combines with water to form acid rain containing nitric acid (HNO3)
a. NO / O2 b. NO / O3 c. NO2 / NO3 d. N2 / O2