AP Biology 2024 Questions And Answers

The AP Biology 2024 exam tested students on foundational biological concepts, scientific inquiry, and data analysis.

The free-response questions from the 2024 exam covered a variety of topics, including:
Question 1 (Long): Crossing over in meiosis and its effects on chromosome number and genetic variation.
Question 2 (Long): Effects of temperature on metabolic rate in toad liver cells, focusing on ATP hydrolysis and oxygen consumption.
Question 3 (Short): The role of water in ATP hydrolysis and the effect of temperature on enzyme activity.
Question 4 (Short): The use of a modified CTF protein as a control in an experiment studying chromosome segregation.
Question 5 (Short): The relationship between metabolic rate, body size, and environmental temperature in animals.
Question 6 (Short): The effect of light intensity on the rate of photosynthesis in aquatic plants.

Questions And Worked Solutions For AP Biology FRQ 2024 Exam

Click on the following image to get the complete paper of AP Biology 2024 Free Response Questions. Scroll down the page for step-by-step solutions.

 
AP Biology 2024 Free Response Questions - Complete Paper (pdf)

2024 AP Biology Free Response Solutions for Questions 1 to 6

• Video for Questions 1 to 6

1. Crossing over in meiosis I is required for homologous chromosomes to properly align during metaphase and segregate during the first cell division …

2. To investigate how increases in environmental temperatures affect the metabolism of certain organisms, researchers incubated liver cells from toads at different temperatures and measured two markers of metabolic activity …

3. To investigate whether red blood cells of animals lose the ability to take in glucose from their environment as they age, scientists collected red blood cells from guinea pigs that ranged in age from one day old to seven months old …

4. The common wild oat is native to regions of Europe and Asia but is an invasive species in central California grasslands. In California, the common wild oat has almost completely replaces some species of native bunchgrass …

5. Researchers study mechanisms that enable of prevent speciation.
   (a) Describe a post-zygotic mechanism that prevents gene flow and thus enables speciation.

6. Scientists can quantify the rate of translation as ribosomes move along mRNA from one codon to the next. Using a procedure called ribosome profiling, the scientist measured how long a ribosome remains stationary at each codon of each mRNA.

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