MCAT Biology Practice Test 2026 (59 Questions Answers)

Question 1

What would be the BEST explanation as to why people with chronic forms of leukemia can live longer untreated than those with acute cases of leukemia?

See solution for the supported answer a second messenger will form within the cell the detection of transcription in the alleged VBNC cells the medulla oblongata

Correct Answer:

See solution for the supported answer

Explanation:

Chronic cases of leukemia involve abnormal cell division of mature cells, so there are still some immature cells that can proliferate into normal mature cells.

Question 2

What is the most logical explanation for why certain drugs may NOT be able to reach the brain if they have been ingested or injected?

tubulin-binding agents These drugs have a chemical nature that does not allow them to cross the blood-brain barrier. the development of cancer While the current infection has been effectively treated, this patient may be at risk for a recurrent UTI.

Correct Answer:

These drugs have a chemical nature that does not allow them to cross the blood-brain barrier.

Explanation:

Correct answer: These drugs have a chemical nature that does not allow them to cross the blood-brain barrier.

Question 3

A variety of risk factors exist for leukemia. Some of these factors include exposure to radiation, certain viral infections, and inherited tendencies.What do all of these factors have in common?

The antibiotics can help prevent bacterial infections in the patient whose leukocyte function is compromised by the cancer. The stem cells are capable of differentiating into new blood cells, which include the leukocytes, erythrocytes, and platelets. All cause changes to the DNA that can lead to the production of altered proteins that can influence the development of cancer. DNA nucleotides use deoxyribose sugar; RNA uses ribose sugar.

Correct Answer:

All cause changes to the DNA that can lead to the production of altered proteins that can influence the development of cancer.

Explanation:

Correct answer: All cause changes to the DNA that can lead to the production of altered proteins that can influence the development of cancer.

Question 4

Many leukemia patients require antibiotic treatments frequently. Why would this be the case?

an increased number of host cells becoming infected as the result of prolonged infection The DNA in each of the daughter cells would be radioactive. Colony-forming units per milliliter of E. coli cells would remain low and the count of metabolically active cells would remain about the same. The antibiotics can help prevent bacterial infections in the patient whose leukocyte function is compromised by the cancer.

Correct Answer:

The antibiotics can help prevent bacterial infections in the patient whose leukocyte function is compromised by the cancer.

Explanation:

Correct answer: The antibiotics can help prevent bacterial infections in the patient whose leukocyte function is compromised by the cancer.

Question 5

Of the types of drugs mentioned in the passage, which category is most likely to be cell-cycle specific?

tubulin-binding agents All cause changes to the DNA that can lead to the production of altered proteins that can influence the development of cancer. Every person carrying a single fatal dominant allele dies, whereas most individuals who carry a single recessive lethal allele live and reproduce. to prevent replication of the viral genome

Correct Answer:

tubulin-binding agents

Explanation:

Correct answer: tubulin-binding agents

Question 1

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About this Exam

Prepare with the MCAT Biology Practice Test 2026 (59 Questions Answers) practice quiz. This question bank includes 58 questions covering cell, water, cells, drugs, and levels. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

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MCAT Biology Practice Test 2026 (59 Questions Answers)

This practice set contains 58 questions from the matching question bank and focuses on cell, water, cells, drugs, and levels. Work through each question carefully, review the provided solutions, and revisit topics that need more study before your next attempt.

This is an independent study resource intended for practice and review; it is not an official examination or an endorsement by any organization named in the title.

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About this Exam

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MCAT Biology Practice Test 2026 (59 Questions Answers)

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