Questions of the TOEFL iBT Reading Comprehension Practice Test 028

Question 1. According to the paragraph, what is the primary source of oxygen in the atmosphere?
A) Carbon dioxide
B) Water
C) Glucose
D) Photosynthesis

Question 2. According to the paragraph, which of the following is NOT true about photosynthesis?
A) It is a complex process that occurs in two main stages
B) Glucose is the basic energy source for all living things
C) The rate of photosynthesis increases as the concentration of carbon dioxide in the air increases
D) Photosynthesis occurs at an optimal temperature range of around 50 to 68 degrees Fahrenheit

Question 3. The author mentions all of the following EXCEPT:
A) The practical applications of photosynthesis in agriculture and energy production
B) The factors that affect the rate of photosynthesis
C) The role of photosynthesis in reducing the amount of carbon dioxide in the atmosphere
D) The process by which photosynthesis produces high-energy electrons

Question 4. According to the paragraph, what is the effect of increasing the amount of light on the rate of photosynthesis?
A) The rate of photosynthesis decreases
B) The rate of photosynthesis remains constant
C) The rate of photosynthesis increases
D) The rate of photosynthesis is not affected by the amount of light

Question 5. Which of the following can be inferred from the paragraph about photosynthesis?
A) Photosynthesis occurs only in green plants
B) The oxygen produced during photosynthesis is necessary for the survival of many living organisms
C) The light-independent reactions occur before the light-dependent reactions
D) The concentration of carbon dioxide does not affect the rate of photosynthesis

Question 6. Paragraph X suggests which of the following about photosynthesis?
A) It is a simple process that occurs in a single stage
B) It is only important for reducing the amount of carbon dioxide in the atmosphere
C) It is responsible for producing the food that plants and other organisms use to survive
D) It occurs at an optimal temperature range of around 32 to 50 degrees Fahrenheit

Question 7. Why does the author mention the practical applications of photosynthesis in fields such as agriculture and energy production?
A) To suggest that photosynthesis is only important for agriculture and energy production
B) To illustrate the versatility and significance of photosynthesis
C) To criticize the use of photosynthesis in agriculture and energy production
D) To suggest that photosynthesis should not be used for energy production

Question 8. Why does the author mention the optimal temperature range for photosynthesis?
A) To suggest that photosynthesis can only occur at a specific temperature
B) To emphasize the importance of maintaining a specific temperature for photosynthesis to occur
C) To criticize the temperature range required for photosynthesis
D) To suggest that photosynthesis occurs at any temperature

Question 9. The word "synthesize" in the passage is closest in meaning to:
A) Analyze
B) Produce
C) Break down
D) Separate

Question 10. The phrase "reduce our reliance on fossil fuels" in the passage is closest in meaning to:
A) Increase our use of fossil fuels
B) Depend more on fossil fuels
C) Decrease our dependence on fossil fuels
D) Continue our current use of fossil fuels