Search results
Instantly turn your notes into practice tests with Quizlet's AI test maker. Create personalized tests, including multiple-choice questions, to check your understanding, identify focus areas, and feel fully prepared for test day!
Study with Quizlet and memorize flashcards containing terms like Scarcity results from the fact that (A) people's wants exceed the resources available to satisfy them. (B) not all goals are desirable. (C) we cannot answer the major economic questions. (D) Choices made in self-interest are not always in the social interest.
Don't know? Click to see the original works with their full license. https://apclassroom.collegeboard.org/19/home?apd=5wiiep1qvw Learn with flashcards, games, and more — for free.
- Total for part (c)
- Question 2: Interpreting and Evaluating Experimental Results with Graphing
- 1 point
- 4 points
- Question 3: Scientific Investigation
- Process
- Question 6: Analyze Data
(d) A drug is designed to bind to cholera toxin and prevent the toxin from crossing the intestinal cell membrane. Scientists mix the drug with cholera toxin and then add this mixture and GTP to a sample of intestinal cell membranes. Predict the rate of cAMP production in pmol per mg adenylyl cyclase per min if the drug binds to all of the toxin.
During meiosis, double-strand breaks occur in chromatids. The breaks are either repaired by the exchange of genetic material between homologous nonsister chromatids, which is the process known as crossing over (Figure 1A), or they are simply repaired without any crossing over (Figure 1B). Plant breeders developing new varieties of corn are interest...
strains II and III . Strain I is higher/different (in the average number of crossovers) compared with strains II and III . Total for part (b)
(c) Based on the data, describe the relationship between the average number of double- 1 point strand breaks and the average number of crossovers in the strains of corn analyzed in the experiment. • (In general) there is a direct correlation/positive relationship (between the number of double-strand breaks and the number of chromatid crossovers). (...
Fireflies emit light when the enzyme luciferase catalyzes a reaction in which its substrate, D-luciferin, reacts to form oxyluciferin and other products (Figure 1). In order to determine the optimal temperature for this enzyme, scientists added ATP to a solution containing D-luciferin, luciferase, and other substances needed for the reaction. They ...
The following models represent all the interacting species in two different communities with some of the same species and feeding relationships. These models assume that both communities have the same initial biomass. The models can be used to understand the effects of human activities on the communities. Figure 1. Models of two different communiti...
Researchers are studying the use of RNA vaccines to protect individuals against certain diseases. To develop the vaccines, particular cells are first removed from an individual. Then mRNAs coding for specific proteins from a pathogen are introduced into the cells. The altered cells are injected back into the individual, where the cells make the pr...
Download free-response questions from past AP Biology exams, along with scoring guidelines, sample responses from exam takers, and scoring distributions.
Questions 4–7 are short free-response questions that require about 9 minutes each to answer and are worth 4 points each. For each question, show your work for each part in the space provided after that part. Examples and equations may be included in your responses where appropriate.
Turn your slides, videos, and notes into flashcard sets, practice tests, and study guides. Memorize anything with personalized practice tests and study sessions in Learn. 98% of students say Quizlet has improved their understanding. Help every student confidently learn anything.
