Q5. Assertion: prokaryotic cells have ribosomes. Reason: ribosomes are membrane-bound organelles. Are both true, and does the reason explain the assertion?
The assertion is true and the reason is false: ribosomes are non-membrane-bound organelles present in both prokaryotes and eukaryotes (NCERT page 88).
Q6. Name the six membrane-bound organelles NCERT gives as examples in Section 8.3, besides the nucleus.
The endoplasmic reticulum, the Golgi complex, lysosomes, mitochondria, microbodies and vacuoles (NCERT page 88).
Q7. A cell is 14 µm across. Using NCERT’s Figure 8.2, is it more likely a typical bacterium or a typical eukaryotic cell?
A typical eukaryotic cell, shown as 10–20 µm; typical bacteria are shown as 1–2 µm (NCERT page 90).
Q8. Why is the cytoplasm called the main arena of cellular activities?
Because various chemical reactions take place in it to keep the cell in the living state (NCERT page 88).