Nokea
Which of the following statements about antibiotics is incorrect?
- A. They can interfere with the bacteria's ability to survive.
- B. They can affect how bacteria multiply.
- C. They can cause more bacteria to grow.
- D. They only work on bacteria.
Correct Answer: C
Rationale: Antibiotics are medications designed to inhibit or kill bacteria. Options A and B are true statements about antibiotics, as they interfere with bacteria's ability to survive and affect their multiplication. However, antibiotics do not cause more bacteria to grow; instead, they aim to decrease bacterial growth by killing or inhibiting them. Therefore, the statement in option C is incorrect, making it the correct answer.
You may also like to solve these questions
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 are prokaryotic organisms, meaning they lack a true nucleus and membrane-bound organelles, unlike eukaryotic cells found in dogs, humans, and onions. Dogs, humans, and onions are examples of organisms with eukaryotic cells that contain a true nucleus and various membrane-bound organelles.
What molecules are unmetabolized by the body, but are used to increase reaction rates?
- A. Sugars.
- B. Proteins.
- C. Enzymes.
- D. Lipids.
Correct Answer: C
Rationale: The correct answer is C: Enzymes. Enzymes are molecules that increase reaction rates by acting as catalysts in biochemical reactions. They are not metabolized by the body, meaning they remain unchanged after facilitating the reactions. Sugars (choice A), proteins (choice B), and lipids (choice D) are all metabolized by the body to provide energy or building blocks for various cellular functions, unlike enzymes which remain unchanged. Therefore, enzymes are the only choice that fits the description of being unmetabolized molecules used to increase reaction rates.
The cellular membrane consists of a bilayer of which substances?
- A. Nucleic acids
- B. Phospholipids.
- C. Proteins.
- D. Carbohydrates.
Correct Answer: B
Rationale:
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.
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.