Which of the following is synthesized by free floating ribosomes of cytoplasm in humans?
Correct answer: A. DNA polymerase
- A. DNA polymerase
- B. Salivary amylase
- C. Pancreatic amylase
- D. Salivary lipase
Explanation
The correct answer is DNA polymerase. Free-floating ribosomes in the cytoplasm synthesize proteins that function within the cell, such as DNA polymerase, which is transported to the nucleus where it is needed. In contrast, salivary amylase, pancreatic amylase, and salivary lipase are synthesized by the rough endoplasmic reticulum (RER) because they are either secreted outside the cell or are destined for the digestive tract.
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Animal, plant, prokaryotic and eukaryotic cells are compared through their membranes, cell walls, nuclei and cytoplasmic organelles. The work includes the structures and functions of mitochondria, chloroplasts, ribosomes, endoplasmic reticulum, Golgi apparatus and lysosomes, as well as chromosome organization and the distinction between chromatin and chromosomes.
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