Cell Organelles – Organelles, Structure, Functions

1. A chloroplast that lacks a cell wall is referred to as __?

  1. A thylakoid
  2. A stroma
  3. A protoplast
  4. A chlorophyll
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Answer: Option C. A protoplast

2. Which of these statements about lysosomes is incorrect?

  1. They contain digestive enzymes
  2. They are formed by the packaging process in the endoplasmic reticulum
  3. They help in waste disposal
  4. They can fuse with other organelles
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Answer: Option B. They are formed by the packaging process in the endoplasmic reticulum

3. Which characteristic of chloroplasts enables them to replicate themselves?

  1. Presence of DNA & ribosomes
  2. Absence of DNA
  3. Lack of a double membrane
  4. Presence of RNA
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Answer: Option A. Presence of DNA & ribosomes

4. Which component of the immune system defends the body against pathogens and foreign substances?

  1. Red blood cells
  2. Leukocytes
  3. Platelets
  4. Neurons
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Answer: Option B. Leukocytes

5. Which of the following structures is absent in animal cells?

  1. Nucleus
  2. Mitochondria
  3. Ribosomes
  4. Cell wall
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Answer: Option D. Cell wall