Nokea
Which type of cells possess a cell membrane?
- A. Prokaryotic cells only
- B. Eukaryotic cells only
- C. Both prokaryotic and eukaryotic cells
- D. None of the above
Correct Answer: C
Rationale: The cell membrane is a fundamental structure found in all cells, serving as a protective barrier and regulating the passage of substances in and out of the cell. Therefore, both prokaryotic and eukaryotic cells have a cell membrane. This makes option C the correct choice.
You may also like to solve these questions
How are viruses categorized?
- A. Presence or absence of an outer envelope.
- B. Size and shape.
- C. All of these are ways in which a virus is categorized.
- D. Type of nucleic acid
Correct Answer: C
Rationale:
Are all bacteria bad, and do they always cause infections?
- A. TRUE
- B. FALSE
- C. Sometimes
- D. Not sure
Correct Answer: B
Rationale: The misconception that all bacteria are harmful and always cause infections is incorrect. Although some bacteria can lead to diseases, it is essential to note that not all bacteria are harmful. In reality, certain bacteria are beneficial and serve important functions in the body, such as aiding in digestion. Therefore, the correct answer is FALSE.
Select the cell parts that are present in plant cells but not animal cells (there may be more than one answer):
- A. Cell membrane
- B. Cell wall
- C. Ribosome
- D. Chloroplast
Correct Answer: D
Rationale: Chloroplasts are unique to plant cells and are responsible for photosynthesis, a process that converts light energy into chemical energy. Animal cells do not contain chloroplasts as they do not perform photosynthesis. Therefore, the correct answer is D - Chloroplast. The cell membrane is found in both plant and animal cells, serving as a protective barrier, while the cell wall is a rigid structure present in plant cells that provides support and protection. Ribosomes are cellular structures responsible for protein synthesis and are present in both plant and animal cells.
Why is homeostasis necessary?
- A. To maintain temperature
- B. To maintain pH
- C. To maintain glucose levels
- D. All of the above
Correct Answer: D
Rationale: Homeostasis is essential for the body to maintain internal balance and ensure optimal functioning. It is responsible for regulating temperature to prevent overheating or cooling, controlling pH levels to support biochemical reactions, and managing glucose levels for energy production. Therefore, all the options - maintaining temperature, pH, and glucose levels - are crucial functions of homeostasis.
How does a bacterium reproduce?
- A. Mitosis
- B. Meiosis
- C. Binary fission
- D. Cytokinesis
Correct Answer: C
Rationale: Bacteria reproduce through binary fission, a process in which a single bacterium divides into two identical daughter cells. Mitosis and meiosis are processes specific to eukaryotic cells, not bacteria. Cytokinesis is the final step of the cell cycle where the cytoplasm divides, but it is not the primary reproductive method for bacteria.