100% Free Test Prep MCAT Practice Test Questions and Answers 2026

The amount of lactic acid in muscles rises when they start lacking: Section: Biological Sciences 

In the United States, breast cancer is the second leading cause of death for women, and as a result, theAmerican Cancer Society, has recommended annual mammography screening for women age 40 years andolder. It is estimated that the risk of mortality can be reduced through this procedure by approximately 20-25%during a ten-year period for women age 40 years and older.In general, cancer screening behaviors have increased in the United States. According to the National HealthInterview Survey, in 1987, approximately 29% of women age 40 years and older reported having had amammogram in the last 2 years. By 2000, this increased to 70%. However, there are racial disparities, as fewerAfrican American and Hispanic women have mammograms compared to their Caucasian female counterparts.Some studies have looked into these differences. Cultural factors seem to play a role in minority womenobtaining fewer mammograms. Asian women, for example, do not like to discuss sensitive topics withstrangers.Prevention promotions have been designed to increase awareness for the need of breast cancer screening,particularly for women in racial and ethnic minority groups. An innovative breast cancer education program,called the Educational Intervention Asian Grocery Store-Based Education Program, was designed to targetAsian women. Located in 20 different Asian grocery stores in communities, the cancer screening exhibits wereplaced at the entrances of the stores. As Asian women came into the grocery store, health information waspassed out to Asian women. Even though only a small amount of women who were considered non-adherentsto breast cancer screening ended up scheduling a screening, the study demonstrated an innovative culturallycompetent approach to health promotion.Source: Adapted from G.R. Sadler, P.R. Beerman, K. Lee et al. “Promoting Breast Cancer Screening AmongAsian American Women: The Asian Grocery Store Based Cancer Education Program.” Copyright 2012 Journalof Cancer Education.How would diffusion of innovations theory attempt to explain why African American women get fewermammograms compared with their Caucasian female counterparts?Section: Psychology and Sociology 

A Hertzsprung - Russel diagram illustrates the different stages in a star’s life cycle. Stars evolve along the mainsequence, increasing in surface temperature. After the main sequence stage, a star cools and expands. Usingthe diagram, which stage would you expect to come directly after the main sequence?Section: Physical Sciences 

The bacterial cells and virus particle, both have: Section: Biological Sciences 

When softball players take batting practice, they often use a machine called an “automatic pitcher,” which isessentially a cannon that uses air pressure to launch a projectile. In a prototype automatic pitcher, a softball isloaded into the barrel of the cannon and rests against a flat disk. That disk is locked into place, and a high airpressure is built up behind it. When the disk is released, the softball is pushed along the barrel of the cannonand ejected at a speed of V0.Figure 1 shows the batter and automatic pitcher. The angle of the barrel to the horizontal is θ. The unit vectors iand j point in the horizontal and vertical directions respectively.Figure 2What is the ratio of the horizontal distance traveled by the softball at Point B to the horizontal distance traveledat Point C?Section: Physical Sciences