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Which one of the following cellular parts is correctly described?

  1. A
    Lysosomes - optimally active at a pH of about
  2. B
    Thylakoids - flattened membranous sacs forming the grana of chloroplasts
  3. C
    Centrioles - sites for active RNA synthesis
  4. D
    Ribosomes - those on chloroplasts are larger () while those in the cytoplasm are smaller ()

Solution & Step-by-step Explanation

* (A) Incorrect: Lysosomes are acid hydrolases ().(B) Correct: Thylakoids are arranged in stacks called grana within the chloroplast.(C) Incorrect: Centrioles form spindle fibers; the nucleolus is the site of RNA synthesis.(D) Incorrect: Organelle ribosomes are ; cytoplasmic are .

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Which one of the following cellular parts is correctly described?
A
Lysosomes - optimally active at a pH of about
B
Thylakoids - flattened membranous sacs forming the grana of chloroplasts
C
Centrioles - sites for active RNA synthesis
D
Ribosomes - those on chloroplasts are larger () while those in the cytoplasm are smaller ()

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