The Future of Medicine

• A. A gene is the entire set of DNA in a cell, while a genome is a single segment of DNA
• B. A genome is the complete set of an organism's DNA, while a gene is a specific segment of DNA that codes for a particular protein or function ✓
• C. A genome contains only the genes that cause disease, while a gene contains all other DNA
• D. A gene and a genome are two names for the same thing

Why: The genome is the full collection of an organism's DNA, including all of its genes, while a gene is a specific region of DNA that typically provides instructions for making a protein or functional RNA molecule.

• A. How genes influence an individual's response to medications ✓
• B. How to manufacture DNA in a laboratory
• C. The history of genetic inheritance in families
• D. How viruses mutate over time

Why: Pharmacogenomics examines how a person's genetic makeup affects how they metabolize and respond to drugs, helping clinicians choose medications and doses tailored to the individual.

• A. Magnetic resonance imaging (MRI)
• B. Next-generation sequencing ✓
• C. Mass spectrometry of blood proteins
• D. Ultrasound imaging

Why: Next-generation sequencing (NGS) allows large amounts of DNA to be read rapidly and affordably, making it the standard tool for genome and exome sequencing in clinical and research settings.

• A. To give every patient the same standard treatment for their condition
• B. To tailor prevention, diagnosis, and treatment to an individual's genetic, environmental, and lifestyle characteristics ✓
• C. To eliminate the need for doctors by using only computers
• D. To treat only patients who have rare genetic diseases

Why: Personalized medicine uses information about a person's genes, environment, and lifestyle to select the most effective prevention and treatment strategies for that specific individual rather than a one-size-fits-all approach.

• A. A large deletion of an entire chromosome
• B. A protein that repairs damaged DNA
• C. A variation in a single DNA base pair that occurs commonly within a population ✓
• D. A virus that inserts itself into the genome

Why: A SNP is a change in one nucleotide at a specific position in the genome that appears in a meaningful share of the population. SNPs are among the most common types of genetic variation and can influence traits and disease risk.

• A. To replace all physicians entirely in clinical decision-making
• B. To analyze patient data and medical images to support clinicians in identifying disease ✓
• C. To manufacture pharmaceutical drugs at lower cost
• D. To schedule hospital staff and manage patient records only

Why: AI in diagnosis is primarily used as a support tool that analyzes data such as medical images, lab results, and patient histories to help clinicians detect and classify diseases, rather than replacing them.

• A. Handwritten physician notes only
• B. Billing and insurance claim records
• C. Radiology images such as X-rays, CT scans, and MRIs ✓
• D. Hospital parking and facility logs

Why: Medical imaging is a major application area for AI because deep learning models, especially convolutional neural networks, are well suited to recognizing visual patterns in X-rays, CT scans, and MRIs.

• A. A set of questions used to test doctors' knowledge
• B. A collection of labeled examples, such as images with confirmed diagnoses, used to teach the AI model ✓
• C. The software interface that doctors use to view results
• D. A list of approved hospitals that can use the system

Why: A training dataset consists of labeled examples, like scans paired with confirmed diagnoses, which the model learns from to recognize patterns associated with specific conditions.

• A. To make the software run faster on hospital computers
• B. To reduce the cost of storing patient records
• C. To ensure the tool performs accurately across different ages, ethnicities, and clinical settings rather than only the group it was trained on ✓
• D. To eliminate the need for regulatory approval

Why: A model trained on narrow data may perform poorly on underrepresented groups, so validation across diverse populations helps detect bias and ensures reliable performance in real-world use.

• A. AI has fully replaced radiologists and pathologists in most hospitals
• B. AI is used only in research laboratories and has no clinical application
• C. AI is increasingly used as an assistive tool, with clinicians typically making the final diagnostic decision ✓
• D. AI makes diagnoses independently without any human oversight anywhere

Why: Most AI diagnostic tools today function as decision-support systems, flagging findings or offering suggestions while a qualified clinician reviews the results and makes the final judgment.

• A. Gyroscope
• B. Photoplethysmography (PPG) sensor ✓
• C. Barometer
• D. Magnetometer

Why: Photoplethysmography uses light-emitting diodes and a photodetector to measure changes in blood volume under the skin, which allows heart rate to be estimated continuously without any chest electrodes.

• A. Blood oxygen levels
• B. Body temperature
• C. Acceleration and movement along multiple axes ✓
• D. Blood glucose concentration

Why: An accelerometer detects changes in velocity along the x, y, and z axes. This makes it useful for tracking steps, physical activity, and sleep movement patterns.

• A. Blood oxygen saturation (SpO2) ✓
• B. Cholesterol level
• C. Kidney function
• D. Bone density

Why: Pulse oximetry uses light absorption at two wavelengths to estimate the percentage of hemoglobin carrying oxygen, which is reported as SpO2. Many modern wearables include this feature.

• A. It cannot measure any physiological signals
• B. It requires a hospital connection to function
• C. Measurements can be affected by motion, skin tone, and fit, and are not always clinically validated ✓
• D. It only works when the device is plugged into a power outlet

Why: Consumer devices can produce noisy data due to motion artifacts, variations in skin pigmentation affecting optical sensors, and poor fit. Many metrics have not undergone the same clinical validation as medical-grade devices.

• A. It eliminates the need for any medical professional
• B. It captures trends and variations over time that single snapshot measurements may miss ✓
• C. It is always more accurate than a clinical measurement
• D. It replaces the need for prescribed medications

Why: Continuous monitoring can reveal patterns such as nighttime heart rate changes or irregular rhythms that occur between appointments, offering a richer picture of health than isolated readings.

• A. Clustered Regularly Interspaced Short Palindromic Repeats ✓
• B. Cellular Ribonucleic Acid Protein Replication System
• C. Chromosomal Recombination Involving Single Proteins
• D. Coding Regions In Stable Polymer Repeats

Why: CRISPR stands for Clustered Regularly Interspaced Short Palindromic Repeats, a naturally occurring DNA sequence pattern found in bacteria that forms the basis of the gene editing tool.

• A. Insulin
• B. Hemoglobin
• C. Cas9 ✓
• D. Collagen

Why: Cas9 is an enzyme that acts like molecular scissors, cutting DNA at the location specified by a guide RNA sequence.

• A. It carries oxygen through the bloodstream
• B. It directs the Cas9 enzyme to a specific DNA sequence ✓
• C. It replaces damaged proteins in cells
• D. It produces energy for the cell

Why: The guide RNA is designed to match a target DNA sequence, leading the Cas9 enzyme precisely to the gene location that needs to be edited.

• A. Type 1 diabetes
• B. Sickle cell disease ✓
• C. Huntington's disease
• D. Cystic fibrosis

Why: Sickle cell disease, a blood disorder caused by a single gene mutation, was among the first conditions treated with an approved CRISPR-based therapy, which works by reactivating fetal hemoglobin production.

• A. It makes cells produce more energy
• B. Changes can be passed on to future generations ✓
• C. It always makes the treatment more expensive
• D. It removes the need for medical testing

Why: Edits made to embryos or germline cells are heritable, meaning they can be inherited by future generations, raising significant ethical and safety questions.

• A. They can only divide once before dying
• B. They can self-renew and differentiate into specialized cell types ✓
• C. They are always found in the blood
• D. They cannot be grown outside the body

Why: Stem cells can make copies of themselves (self-renewal) and can develop into specialized cells such as muscle, nerve, or blood cells (differentiation). This dual capacity is the foundation of regenerative medicine.

• A. Adult stem cells
• B. Hematopoietic stem cells
• C. Embryonic stem cells
• D. Mesenchymal stem cells

• A. A stem cell taken directly from an embryo
• B. An adult cell reprogrammed to behave like an embryonic stem cell
• C. A stem cell donated from umbilical cord blood only
• D. A cancer cell that has become immortal

• A. Repairing a broken bone with a simple cast
• B. Treating certain blood cancers such as leukemia
• C. Correcting a vision problem through laser surgery
• D. Removing kidney stones

• A. Embryonic stem cells cannot be stored safely
• B. Obtaining these cells typically requires destroying a human embryo
• C. Embryonic stem cells always cause tumors
• D. The cells are too small to study under a microscope

• A. Surgery performed by robots inside the operating room
• B. The delivery of healthcare services remotely using communication technology ✓
• C. A type of medical imaging that uses radio waves
• D. Storing patient records in a centralized hospital database

Why: Telemedicine refers to providing clinical care at a distance, typically through video calls, phone calls, or secure messaging, allowing patients and providers to interact without being in the same physical location.

• A. It eliminates the need for any medications
• B. It reduces the need to travel long distances to see a specialist ✓
• C. It guarantees faster emergency surgery
• D. It removes the need for health insurance

Why: Many rural residents face long travel times to reach specialists. Telemedicine can connect them with providers remotely, improving access to care without costly and time-consuming trips.

• A. Only electronic prescriptions sent by fax
• B. A broad range of technologies such as wearables, health apps, telehealth, and electronic health records ✓
• C. Exclusively hospital billing software
• D. Video games designed to teach anatomy only

Why: Digital health is an umbrella term covering many tools that use technology to support health, including mobile health apps, wearable devices, telehealth services, and electronic health records.

• A. Patients always have too much bandwidth
• B. The digital divide, including lack of internet access, devices, or digital literacy ✓
• C. Doctors are unable to speak through a screen
• D. Telemedicine cannot be used for any medical condition

Why: The digital divide means some people lack reliable internet, affordable devices, or the skills to use digital tools, which can prevent them from benefiting from telemedicine and widen health disparities.

• A. Patient data should always be shared publicly to improve research
• B. Platforms should use secure, encrypted communication that complies with health privacy regulations ✓
• C. Video calls are automatically private, so no safeguards are needed
• D. Privacy only matters for in-person visits

Why: Telemedicine involves sensitive health information transmitted electronically, so platforms must use strong encryption and follow privacy laws such as HIPAA in the United States to protect patient confidentiality.

• A. Treating diseases after symptoms become severe
• B. Reducing the likelihood of disease before it develops ✓
• C. Replacing all hospital-based treatment with surgery
• D. Extending the lifespan of individuals who already have terminal illness

Why: Preventive care aims to stop disease from developing in the first place, through screening, vaccination, lifestyle changes, and risk reduction, rather than only treating it once it has appeared.

• A. A type of surgical implant used to monitor heart rhythm
• B. A measurable indicator of a biological state or process that can signal aging or disease risk ✓
• C. A genetic mutation that guarantees the development of cancer
• D. A drug that permanently stops the aging process

Why: Biomarkers are measurable biological indicators, such as blood markers, epigenetic patterns, or imaging findings, that can help estimate biological age, disease risk, or response to treatment.

• A. Consuming high amounts of processed sugar
• B. Regular physical activity ✓
• C. Sleeping more than 12 hours every night
• D. Avoiding all social interaction

Why: Regular physical activity is strongly associated across many large studies with reduced risk of cardiovascular disease, diabetes, certain cancers, and early mortality, making it a cornerstone of preventive health.

• A. The total number of years a person lives, regardless of health
• B. The number of years a person lives in good health, free from serious chronic disease ✓
• C. The average time a patient spends in a hospital each year
• D. The period between birth and the first medical checkup

Why: Healthspan focuses on the quality of life years, the period spent in good health, as distinct from lifespan, which only measures total years lived. Longevity science increasingly aims to extend healthspan, not just lifespan.

• A. They guarantee that no disease will ever be missed
• B. They allow early detection of conditions when treatment is often more effective ✓
• C. They eliminate the need for doctors to interpret test results
• D. They are designed to diagnose only patients who already show advanced symptoms

Why: Screening identifies diseases such as breast or colorectal cancer at earlier, more treatable stages. However, screening is not perfect and involves tradeoffs such as false positives, so guidelines weigh benefits against harms.