Nokea
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.
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Which term means a group of similar cells combined to perform a common function?
- A. Tissue
- B. System.
- C. Organism.
- D. Organ.
Correct Answer: A
Rationale:
Which combination of cell cycle phase and descriptor is correct?
- A. S phase - the cell synthesizes DNA and doubles its cytoplasm.
- B. Interphase - the cell increases in mass and number of organelles to prepare for cell division.
- C. G1 phase - the phase prior to the start of mitosis in which the cell continues to grow in size and make proteins.
- D. G2 phase - the amount of chromosomes is doubled.
Correct Answer: C
Rationale:
What is the first step in the process of respiration?
- A. Fermentation
- B. Krebs cycle
- C. Electron transport chain
- D. Glycolysis
Correct Answer: D
Rationale: The correct answer is Glycolysis. Glycolysis is the initial step in cellular respiration where glucose is broken down into pyruvate, producing a small amount of ATP and NADH in the cytoplasm. This step is crucial as it initiates the breakdown of glucose, setting the stage for further energy production in subsequent stages like the Krebs cycle and electron transport chain.
What part of a light microscope is used to hold the slide in place?
- A. Stage clips
- B. Rack stop.
- C. Base.
- D. Arm.
Correct Answer: A
Rationale:
Why is DNA important for metabolic activities of the cell?
- A. It initiates cellular mitosis.
- B. It provides cell wall stability.
- C. It increases glucose absorption.
- D. It controls the synthesis of enzymes.
Correct Answer: D
Rationale: DNA is crucial for metabolic activities as it contains the genetic information needed for the synthesis of enzymes, which are essential for various metabolic reactions within the cell. Enzymes are biological catalysts that regulate and speed up chemical reactions, allowing the cell to carry out necessary metabolic processes efficiently. Therefore, DNA's role in controlling enzyme synthesis directly impacts the cell's metabolic activities, making option D the correct answer.