which of the following is called protein synthesizing machine?
Correct answer: D. ribosomes
- A. mitochondria
- B. nucleus
- C. chromosomes
- D. ribosomes
Explanation
Ribosomes are protein-synthesizing machines because they read the codons of mRNA and join amino acids in the correct sequence to form a polypeptide. Students may choose the nucleus because it contains DNA, but the nucleus provides the genetic instructions rather than directly assembling the protein.
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About Cytoplasmic Organelles
Cytoplasmic organelles are the specialized structures suspended in cytoplasm, including mitochondria, ribosomes, endoplasmic reticulum, Golgi apparatus, lysosomes, vacuoles and centrosomes. Questions compare their structures and functions in animal and plant cells, including chloroplasts and the role of the endomembrane system in transport and secretion.
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