Daily Trivia Quiz - Day 252 (2026-07-21)

Question 1

Stomach acid can digest food. Why doesn't it usually digest the stomach itself?

Accepted Answer

Mucus and the epithelial barrier protect the stomach lining

Answer

Stomach acid becomes acidic only after food enters

Answer

Stomach cells are naturally unaffected by acid

Answer

Pepsin can digest only plant proteins

Question 2

Why is the small intestine not smooth like a pipe, but covered in folds and villi?

Accepted Answer

They greatly increase the surface area for nutrient absorption

Answer

They slow all nutrients from entering the blood

Answer

They increase air storage space in the intestine

Answer

They mechanically grind large food molecules

Question 3

Why can antibiotics kill bacteria without usually killing human cells directly?

Accepted Answer

Many antibiotics target structures or processes bacteria have and human cells lack

Answer

Human cells have thicker cell walls than bacteria

Answer

Antibiotics recognize only cell size, not structure

Answer

Antibiotics mainly target human mitochondrial membranes

Question 4

Why do singers on very early recordings often sound unusually forceful or exaggerated?

Accepted Answer

Early recording equipment was limited, so performers had to adapt to mechanical capture

Answer

Early recording captured every frequency detail perfectly

Answer

Singers changed style mainly to match record speed

Answer

Singers had to stand far from the recording horn to be clear

Question 5

Why does desert restoration often favor native plants over simply choosing the fastest-growing trees?

Accepted Answer

Native plants are more likely to fit local water, soil, and ecological relationships

Answer

Native plants always grow faster than introduced trees

Answer

Native plants usually do not use groundwater

Answer

Native plants are basically immune to pests

Question 6

Why do fermented foods develop sourness, bubbles, or distinctive aromas?

Accepted Answer

Microbes transform sugars and other compounds into acids, gases, and aroma molecules

Answer

Fermentation mainly makes bubbles by simple oxidation

Answer

Fermentation aroma mainly comes from heating the food

Answer

Fermentation changes texture but does not create new molecules

Question 7

Why is early jazz improvisation not just random playing?

Accepted Answer

Improvisation usually works within chord changes, rhythm, and style vocabulary

Answer

Improvisation usually requires no knowledge of harmony

Answer

Improvisation is mainly about playing as fast as possible

Answer

Improvisation requires avoiding the original rhythm every time

Question 8

Some desert plants look pale and fuzzy, almost like they wear sunscreen. What are they protecting against?

Accepted Answer

Strong light and water loss through transpiration

Answer

Absorbing more heat to speed transpiration

Answer

Letting salt enter leaf cells more easily

Answer

Increasing direct contact between leaves and air

Question 9

Why does egg white turn from clear to white and solid when heated?

Accepted Answer

Proteins denature and tangle into a network

Answer

Heated proteins become transparent again

Answer

Egg white solidifies because its water quickly freezes

Answer

Egg white turns white mainly because fat is emulsified

Question 10

Bacteria have no nucleus. How can they still read genetic information?

Accepted Answer

Their DNA sits in a nucleoid region within the cytoplasm

Answer

Bacteria store genetic information mainly in the cell wall

Answer

Bacteria create genetic material only briefly during division

Answer

Bacteria mainly use a nuclear membrane to read genes