The chloroplasts contain:
Correct answer: D. Proteins, Ribosomes, and small circular DNA
- A. Proteins only
- B. Ribosomes only
- C. Small circular DNA only
- D. Proteins, Ribosomes, and small circular DNA
Explanation
Chloroplasts are chlorophyll-containing organelles in plant cells; they play a vital role in life on Earth since photosynthesis takes place in chloroplasts. Chloroplasts develop from proplastids. Chloroplasts contain their own DNA and ribosomes and thus can make their own proteins. It is estimated that the chloroplast contains between 2000 and 5000 different proteins; thus, the majority of chloroplast proteins are encoded by the nuclear genome.
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Cellular respiration explains how cells release energy from glucose through glycolysis, the link reaction, Krebs cycle and electron transport chain. It includes ATP production, substrate-level and oxidative phosphorylation, aerobic versus anaerobic respiration, and the roles of mitochondria, oxygen and fermentation in energy transfer.
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