Nokea
Which cellular component contributes to the protection, communication, and passage of substances into and out of the cell?
- A. Nucleus
- B. Cell membrane
- C. Endoplasmic reticulum
- D. Cytoplasm
Correct Answer: B
Rationale: The cell membrane is responsible for protecting the cell, facilitating communication with the external environment, and controlling the passage of substances into and out of the cell. It acts as a barrier, regulating the entry and exit of molecules to maintain the cell's internal environment. The nucleus, endoplasmic reticulum, and cytoplasm have their own distinct functions within the cell but do not primarily serve the purposes mentioned in the question.
You may also like to solve these questions
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.
Which method of glucose conversion generates the most usable and efficient form of ATP within the human body?
- A. Lactic acidosis.
- B. Fermentation conversion.
- C. Anaerobic respiration.
- D. Aerobic respiration.
Correct Answer: D
Rationale:
What is the purpose of cellular respiration?
- A. Enable fermentation
- B. Produce enzymes
- C. Produce oxygen molecules
- D. Obtain energy in the form of ATP
Correct Answer: D
Rationale: The correct answer is D. The primary purpose of cellular respiration is to obtain energy in the form of ATP. During cellular respiration, glucose and other organic molecules are broken down to release energy in the form of ATP, which is crucial for various cellular functions and activities. This energy is used by cells to carry out processes such as growth, repair, movement, and maintaining homeostasis.
Which of the following statements is false?
- A. Animal cells use lysosomes to break down old cells
- B. Animal cells use chloroplasts to gain energy
- C. Plant cells have a cell wall to maintain structure
- D. All of the above are true
Correct Answer: B
Rationale: The correct statement is B. Animal cells do not use chloroplasts to gain energy; instead, they rely on mitochondria for energy production through cellular respiration. Lysosomes in animal cells are responsible for breaking down old cells and cellular waste. Plant cells have a cell wall to provide structural support and protection. Therefore, option B is false, as animal cells do not utilize chloroplasts for energy.
On what part of a light microscope is the slide placed?
- A. Base.
- B. Arm.
- C. stage
- D. Lens.
Correct Answer: C
Rationale: