Nokea
Which vitamin is recognized for its healing antioxidant properties?
- A. Vitamin D
- B. Vitamin K
- C. Vitamin A
- D. Vitamin E
Correct Answer: C
Rationale: Vitamin A is well-known for its antioxidant properties, essential for healing, maintaining healthy skin and tissues, and supporting the immune system. It plays a vital role in repairing damaged tissues, making it crucial for overall health and facilitating healing processes.
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A pencil measures 8 cm long. What is this length in mm?
- A. 80 mm
- B. 800 mm
- C. 8 mm
- D. 0.8 mm
Correct Answer: A
Rationale: To convert centimeters to millimeters, you multiply by 10 since there are 10 millimeters in 1 centimeter. Therefore, 8 cm x 10 = 80 mm. The correct answer is 80 mm.
What is the function of water in photosynthesis?
- A. Combines with carbon dioxide
- B. Absorbs light energy
- C. Supplies electrons in the light reactions
- D. Transports hydrogen ions in the dark reactions
Correct Answer: C
Rationale: In photosynthesis, water plays a crucial role in supplying electrons during the light reactions of the process. When light energy is absorbed by chlorophyll, water molecules are split through photolysis, releasing electrons. These electrons are then used in the photosynthetic electron transport chain to generate ATP and NADPH, essential for the synthesis of sugars during the light-dependent reactions.
Phenotype refers to the....................of an individual.
- A. Genetic makeup
- B. Actual physical appearance
- C. Recessive alleles
- D. None of the above
Correct Answer: B
Rationale: Phenotype refers to the observable characteristics or traits of an individual, such as physical appearance, behavior, and other observable features. While the genotype represents the genetic makeup of an individual, the phenotype is what is actually expressed or seen. Recessive alleles are specific forms of genes that can be present in the genotype but may not always be expressed in the phenotype.
What cellular appendage enables cells to move through their environments?
- A. Flagellum
- B. Cell membrane
- C. Transport protein
- D. Receptor
Correct Answer: A
Rationale: The flagellum is a whip-like appendage found in certain cells like sperm cells and some bacteria, enabling them to move through their environments. It plays a crucial role in locomotion by allowing cells to swim or propel themselves in liquids, aiding in their movement and navigation.
Are all bacteria bad, and do they always cause infections?
- A. TRUE
- B. FALSE
- C. Sometimes
- D. Not sure
Correct Answer: B
Rationale: The misconception that all bacteria are harmful and always cause infections is incorrect. Although some bacteria can lead to diseases, it is essential to note that not all bacteria are harmful. In reality, certain bacteria are beneficial and serve important functions in the body, such as aiding in digestion. Therefore, the correct answer is FALSE.