Nursing Elites

1. Which of the following organisms would not have eukaryotic cells?

• A. Bacteria
• B. Dog
• C. Human
• D. Onion

Correct answer: A

Rationale: The correct answer is A, Bacteria. Bacteria do not have eukaryotic cells. They are single-celled organisms with prokaryotic cells. Dogs, humans, and onions are all multicellular organisms that possess eukaryotic cells. Therefore, choices B, C, and D have eukaryotic cells and are not the correct answer.

2. What is the main function of the cell membrane?

• A. Energy production
• B. Communication
• C. Protein synthesis
• D. Waste removal

Correct answer: B

Rationale: The main function of the cell membrane is communication. It acts as a barrier that regulates the passage of substances in and out of the cell, maintaining cellular homeostasis. Choices A, C, and D are incorrect because energy production occurs in the mitochondria, protein synthesis takes place in the ribosomes, and waste removal is primarily handled by the lysosomes and other organelles within the cell.

3. Why is it important for cells to undergo mitosis?

• A. mitosis allows for reproduction with male and female gametes
• B. mitosis increases variation within the species
• C. mitosis produces cells that are different from the parent cell
• D. mitosis produces cells for growth and repair of body tissue

Correct answer: D

Rationale: It is important for cells to undergo mitosis because it produces cells for the growth and repair of body tissues. Mitosis allows for the formation of genetically identical daughter cells, ensuring proper function and maintenance of the organism's body. By producing new cells, mitosis helps in the replenishment of damaged or worn-out tissue and supports overall growth and development. Choices A, B, and C are incorrect because mitosis is not directly related to reproduction with male and female gametes, increasing variation within the species, or producing cells different from the parent cell. These functions are more associated with meiosis, which is specifically for sexual reproduction and genetic diversity.

4. Which one is not a reactant in photosynthesis?

• A. Water
• B. Light energy
• C. Glucose
• D. Carbon dioxide

Correct answer: C

Rationale: The correct answer is C: Glucose. Glucose is not a reactant in photosynthesis but a product. During photosynthesis, plants use water, carbon dioxide, and light energy as reactants to produce glucose and oxygen. Water is essential for the process of photosynthesis, along with carbon dioxide and light energy. Light energy is necessary for the light-dependent reactions to occur, which eventually leads to the production of glucose. Carbon dioxide is absorbed by plants through tiny pores called stomata and is used in the Calvin cycle to synthesize glucose. Therefore, glucose is the product of photosynthesis, not a reactant.

5. Which organelle provides storage space for the cell?

• A. Mitochondrion
• B. Vacuole
• C. Cell membrane
• D. Ribosome

Correct answer: B

Rationale: The correct answer is B: Vacuole. The vacuole is the organelle responsible for providing storage space in the cell. It stores water, nutrients, waste products, and other essential materials required by the cell. Vacuoles are crucial for maintaining cell structure and regulating cellular processes. Mitochondrion (choice A) is known as the powerhouse of the cell, responsible for producing energy. The cell membrane (choice C) is a protective barrier around the cell, regulating what enters and exits the cell. Ribosomes (choice D) are involved in protein synthesis, not storage.

Similar Questions