Nokea
Which characteristic is typically found in prokaryotic cells?
- A. Have a nucleus
- B. Have a capsule
- C. Have membrane-bound organelles
- D. Cannot move on their own
Correct Answer: B
Rationale: Prokaryotic cells are characterized by the absence of a nucleus and membrane-bound organelles. One common feature of prokaryotic cells is the presence of a capsule, which is a protective layer outside the cell wall. This capsule helps protect the cell and can also assist in adherence to surfaces. Therefore, the correct characteristic typically found in prokaryotic cells is that they have a capsule.
You may also like to solve these questions
Which is an example of the correct organizational hierarchy for a wolf?
- A. Muscle tissue, blood cell, DNA, organ, circulatory system, wolf
- B. DNA, blood cell, muscle tissue, heart, circulatory system, wolf
- C. Circulatory system, DNA, muscle tissue, blood cell, heart, wolf
- D. Blood cell, organ, circulatory system, muscle tissue, DNA, wolf
Correct Answer: B
Rationale: The correct organizational hierarchy in biology follows a specific order from smallest to largest. It starts with DNA (genetic material), followed by blood cells (basic units of life), then muscle tissue (a collection of cells), followed by the heart (an organ), then the circulatory system (a system of organs), and finally the whole organism, the wolf. Therefore, the correct sequence for the organizational hierarchy for a wolf is DNA, blood cell, muscle tissue, heart, circulatory system, and wolf.
What's the first step in the process of respiration?
- A. Fermentation.
- B. Glycolysis.
- C. Krebs cycle.
- D. Electron transport chain.
Correct Answer: B
Rationale:
In the presence of which molecule does aerobic respiration occur?
- A. Oxygen
- B. Lactic acid
- C. Carbon dioxide
- D. Water
Correct Answer: A
Rationale: Aerobic respiration is a process that requires oxygen to efficiently convert glucose into carbon dioxide, water, and ATP. Oxygen plays a critical role in this metabolic pathway by acting as the final electron acceptor in the electron transport chain, allowing the production of ATP through oxidative phosphorylation. Therefore, oxygen is the essential molecule for aerobic respiration to take place.
What term best describes the sum of all an organism's chemical processes?
- A. Respiration.
- B. Anabolism.
- C. Metabolism.
- D. Differentiation.
Correct Answer: C
Rationale: The correct answer is C: Metabolism. Metabolism refers to the sum of all chemical processes in an organism to maintain life. It includes both anabolism (building up molecules) and catabolism (breaking down molecules). Respiration (A) is a specific part of metabolism involving the breakdown of glucose to produce energy. Anabolism (B) is the process of building complex molecules from simpler ones. Differentiation (D) is the process in which cells become specialized for specific functions, not related to the sum of all chemical processes in an organism. Therefore, metabolism is the most appropriate term to describe the overall chemical processes in an organism.
What structure in a plant cell is surrounded by a double membrane and contains most of the genetic information used to control the cell?
- A. Mitochondrion
- B. Nucleus.
- C. Chromatin.
- D. Chromosome.
Correct Answer: B
Rationale: Rationale: The correct answer is B: Nucleus. The nucleus is surrounded by a double membrane and contains most of the genetic information in the form of DNA, which controls the cell's activities. Mitochondria (A) are involved in energy production, chromatin (C) is a complex of DNA and proteins within the nucleus, and chromosomes (D) are condensed structures of DNA found in the nucleus during cell division. Therefore, the nucleus is the structure that fits the description provided in the question.