Grey's Anatomy IRL
What structure connects muscles to bones and is composed primarily of collagen fibers?
Tendons
What is the hardest substance in the human body?
Enamel
I can beat 100 times a minute without getting tired. I have chambers but no doors. What am I?
The heart
I’m the functional group found in alcohols and sugars alike; I make things polar and ready to strike.
Hydroxyl group (-OH)
What country has the most natural lakes in the world?
Canada
Which part of the brain regulates vital functions like heart rate, breathing, and blood pressure?
Medulla oblongata
Which tooth is known as the “six-year molar”?
First permanent molar
I strike without warning, I steal every breath. A single shot saves you from death. What am I?
Anaphylaxis (treated with epinephrine)
I link amino acids side by side; break me, and proteins can’t hide.
Peptide bond (amide bond)
What language has the most native speakers in the world?
Mandarin Chinese
During inspiration, the diaphragm contracts and moves in which direction?
Downward (inferiorly), increasing thoracic volume
During tooth development, which embryonic tissue gives rise to enamel?
Ectoderm (specifically, ameloblasts derived from the enamel organ)
Cut me in half, and I’ll grow back anew. No other organ can do what I do.
The liver
During an SN1 reaction, what is the rate-determining step?
Formation of the carbocation intermediate
What chemical element was named after the creator of the periodic table?
Mendelevium (Md)
What layer of the heart is responsible for the actual contraction of cardiac muscle?
Myocardium
Orthodontic tooth movement relies on the continuous remodeling of which supporting structure?
Periodontal ligament
I show inside to CD8 patrol; when I go missing, NKs take their toll. What am I?
MHC class I
What is the hybridization and approximate bond angle of the carbon atom in formaldehyde (CH₂O)?
The carbon is sp² hybridized with approximately 120° bond angles.
In computing, what does “HTTP” stand for?
HyperText Transfer Protocol
Which cranial nerve is responsible for facial sensation and motor control of mastication?
Trigeminal nerve (Cranial Nerve V)
What type of dental radiograph is best for detecting interproximal caries?
Bitewing radiograph
I’m tiny, double-stranded, and silence you quick.
RISC is my partner—we choose which genes to nick.
What is siRNA?
A secondary alcohol is oxidized using PCC (pyridinium chlorochromate). Which product is formed, and why would using a stronger oxidizing agent like KMnO₄ change the outcome?
PCC oxidizes a secondary alcohol to a ketone, stopping at that stage because it’s a mild oxidizing agent and does not over-oxidize. Using KMnO₄ (a strong oxidizer) would not change the product for a secondary alcohol but would over-oxidize a primary alcohol to a carboxylic acid instead of an aldehyde.
What is the only country in the world that has a non-rectangular flag?
Nepal