Question

multiple choice: choose the best answer.

1. which of the following is not a major difference between a prokaryotic and eukaryotic cell?

a. prokaryotic cells are simple, while eukaryotic are complex.
b. prokaryotic cells have a flagella to move it, while eukaryotic cells do not.
c. prokaryotic cells have cytoplasm, while eukaryotic cells do not.
d. prokaryotic cells are very small, while eukaryotic cells are typically much larger and complex.

1. what is the main purpose of the membrane in a eukaryotic cell?

a. to provide the cell with energy
b. to let substances in and out
c. to make the things cells need to function
d. to clean up a cell

1. which of the following best completes the analogy?

lysosome : vacuum cleaner :: nucleus : --------------------
a. skin
b. water
c. brain
d. factory

1. what is the authors main purpose in writing this selection?

a. to explain how the human body is composed of cells.
b. to entertain the reader with an interesting story about cells.
c. to persuade the reader to become a biologist who studies cells.
d. to inform the reader of what a cell is and its various parts.

1. the flagella are whip - like appendages that help the cell move. not all prokaryotic cells have flagella.

what is the best meaning of appendages in the previous quote?
a. something connected to another thing that is more important
b. a projecting part that is attached to something else
c. a person who is dependent on someone else
d. a larger part of something

Explanation:

1. Both prokaryotic and eukaryotic cells have cytoplasm. Prokaryotic cells are simple and small, eukaryotic are complex and larger. Some eukaryotic cells (like sperm) have flagella.
2. The membrane in a eukaryotic cell controls the movement of substances in and out (selective permeability). Mitochondria provide energy, ribosomes make needed things, lysosomes clean.
3. Lysosome is like a vacuum cleaner (cleans). Nucleus is like a brain (controls cell activities).
4. The text likely aims to inform about cells (their types, parts etc. as per questions 11 - 13 context).
5. Flagella are attached (projecting) parts (whip - like) that help movement. “Appendages” mean a projecting part attached to something else.

Answer:

1. C. Prokaryotic cells have cytoplasm, while eukaryotic cells do not.
2. B. To let substances in and out.
3. C. Brain.
4. D. To inform the reader of what a cell is and its various parts.
5. B. A projecting part that is attached to something else.