Question: A catalyst functions to…
Answer Choices: A‑ Raise activation energy B‑ Increase product yield C‑ Make non‑spontaneous reactions spontaneous D‑ Increase reaction rate
Answer: D Increase reaction rate
Question: Carbon has an atomic number of 6. Which of the following is true about the isotope C‑12?
Answer Choices: A. C‑12 possesses 7 neutrons and 5 electrons in its nucleus. B. C‑12 possesses 7 protons and 5 neutrons. C. C‑12 possesses 6 neutrons and 6 protons. D. C‑12 possesses 6 protons and 6 electrons.
Answer: C. C‑12 possesses 6 neutrons and 6 protons.
Question: A vasectomy causes infertility because it:
Answer Choices: Blocks sperm from epididymis to urethra Blocks sperm from ejaculatory duct to bulbourethral gland Blocks sperm from prostate to bulbourethral gland Blocks sperm from testis to epididymis
Answer: Blocks the movement of sperm from the epididymis into the urethra.
Question: A pudding recipe for 50 people calls for 4 cups of sugar. Each bag contains 6 cups. How many bags are needed to serve 300 people?
Answer Choices: 4 bags 13 bags 24 bags 8 bags
Answer: 24 bags
Question: Jaundice, which is characterized by a yellowish tinge to the tissues, is due to an increased blood concentration of what substance?
Answer Choices: A. Cholesterol; B. Bile pigments; C. Hemoglobin A; D. Carotene
Answer: B. Bile pigments
Question: Function of a catalyst?
Answer Choices: Increase activation energy Increase product yield Make non‑spontaneous reaction spontaneous Increase reaction rate
Answer: Increase the rate of a reaction.
Question: Which equation shows the reaction that takes place when there are excessive protons (H⁺) in blood?
Answer Choices: A. H₂CO₃ → CO₂ + H₂O B. HCO₃⁻ + H⁺ → H₂CO₃ C. H₂CO₃ → HCO₃⁻ + H⁺ D. CO₂ + H₂O → H₂CO₃
Answer: B. HCO₃⁻ + H⁺ → H₂CO₃
Question: Why does water have a concave meniscus in a glass beaker?
Answer Choices: A. The adhesive forces with the glass are greater than the cohesive forces. B. The cohesive forces with the glass are greater than the adhesive forces. C. Glass has a higher density than water. D. Water has a higher density than glass.
Answer: A. The adhesive forces with the glass are greater than the cohesive forces.
Question: The enzyme carbonic anhydrase catalyzes the reaction between which two substrates?
Answer Choices: A. Carbon dioxide and bicarbonate ion; B. Water and bicarbonate ion; C. Carbon dioxide and water; D. Carbon dioxide and hydrogen ion
Answer: C. Carbon dioxide and water
Question: Adaptive immunity is…
Answer Choices: A‑ Barrier defenses B‑ Internal nonspecific defenses C‑ Response to specific pathogen traits D‑ Inflammatory response
Answer: C Response to specific pathogen traits
Question: A farmer needs to buy fertilizer for his farmland. The instructions say 49.5 lb of fertilizer is needed per acre. The farmer buys 2,000 lb of fertilizer. Approximately how many acres can he cover?
Answer Choices: A. 125 B. 1,000 C. 40 D. 300
Answer: C. 40
Question: Fertilizer label: 49.5 lb per acre. If a farmer buys 2 000 lb, about how many acres can be covered?
Answer Choices: 125 1 000 40 300
Answer: 40 acres
Question: Which of the following occurs during inhalation?
Answer Choices: A. Air moves from low to high pressure. B. The ribcage lowers. C. Thoracic volume decreases. D. The diaphragm moves downward.
Answer: D. The diaphragm moves downward.
Question: Regarding the pH scale, how does pH 3 compare with pH 4?
Answer Choices: 10× more alkaline 10× more acidic 2× more alkaline 2× more acidic
Answer: A substance with pH 3 is 10 times more acidic than one with pH 4.
Question: What is a function of a catalyst?
Answer Choices: A. Increase activation energy. B. Increase product yield. C. Make a non‑spontaneous reaction spontaneous. D. Increase the rate of a reaction.
Answer: D. Increase the rate of a reaction.
Question: “Germinating beans will use more oxygen than non‑germinating beans.” This prediction is a:
Answer Choices: Hypothesis Conclusion Observation Data collection
Answer: Hypothesis
Question: A scientist predicts that germinating beans will use more oxygen than non‑germinating beans. This prediction is referred to as what?
Answer Choices: A. A hypothesis B. A conclusion C. An observation D. Data collection
Answer: A. A hypothesis
Question: Carbon’s atomic number is 6. Which is true about isotope C‑12?
Answer Choices: A‑ 7 neutrons & 5 electrons B‑ 7 protons & 5 neutrons C‑ 6 neutrons & 6 protons D‑ 6 protons & 6 electrons
Answer: C 6 neutrons & 6 protons
Question: Which occurs during inhalation?
Answer Choices: Air moves low → high pressure Ribcage lowers Thoracic volume decreases Diaphragm moves downward
Answer: The diaphragm moves downward.
Question: A right‑triangle’s hypotenuse is 13 inches. Which pair could be the other sides?
Answer Choices: 2.5 in & 4 in 2.5 in & 6 in 5 in & 12 in 5 in & 8 in
Answer: 5 in & 12 in