Egg Quiz
Questions: 16 · 10 minutes
1. A small amount of yolk accidentally gets into egg whites intended for a meringue. Why can this hinder whipping?
Yolk makes the mixture too alkaline to hold air
Yolk dissolves the proteins responsible for sweetness
Fat from the yolk interferes with formation of a stable protein foam
Pigment from the yolk makes the air bubbles too heavy
2. A dessert recipe uses eggs without a later cooking step. Which choice most directly reduces the risk associated with raw egg?
Choosing eggs with the darkest shells available
Bringing ordinary eggs to room temperature first
Using pasteurized eggs or pasteurized egg products
Separating the whites and yolks before combining them
3. Why is egg yolk useful when making mayonnaise?
Its sugar permanently thickens oil when chilled
Its calcium neutralizes all acids in the mixture
Its shell-forming proteins convert the oil into water
Its emulsifiers help oil and water-based ingredients remain mixed
4. What mineral compound makes up most of a chicken egg’s shell?
Magnesium sulfate
Calcium phosphate
Sodium bicarbonate
Calcium carbonate
5. An eggshell placed in vinegar begins producing bubbles. Which reaction best explains this?
Shell proteins ferment and release oxygen
The shell absorbs nitrogen from the surrounding air
Water inside the egg boils at room temperature
Acid reacts with calcium carbonate and releases carbon dioxide
6. Raw egg spills onto a kitchen counter. Which response best limits cross-contamination?
Clean the spill promptly, wash the surface, and wash your hands with soap
Wipe it with a dry towel and let the remaining moisture evaporate
Cover it with flour, brush it away, and continue preparing food
Move nearby ingredients aside and clean the counter after the meal
7. Two eggs have brown and white shells but are otherwise comparable. What primarily determines their shell color?
The amount of protein in the egg
The hen’s access to sunlight
The hen’s breed and genetics
The egg’s freshness at the time it was laid
8. A hard-cooked egg develops a green-gray ring around its yolk. What is the most likely explanation?
The yolk absorbed pigment from the shell
The egg was fertilized before it was cooked
The yolk’s fat oxidized because the shell was porous
Prolonged heat caused sulfur and iron compounds to react
9. What is candling used to do with an egg?
Seal shell pores with a thin layer of wax
Examine internal features by shining light through the shell
Measure shell strength by applying controlled heat
Remove bacteria by exposing the shell to bright light
10. When an egg is heated, why do the transparent white and liquid yolk become firmer?
Their proteins unfold and form new networks through coagulation
Their minerals crystallize into a solid shell-like structure
Their carbohydrates expand and absorb all available water
Their fats evaporate and leave a rigid structure behind
11. Where is an egg’s air cell normally located?
Inside the center of the yolk
Between shell membranes at the broad end
Within the chalaza attached to the yolk
Along the narrow end of the shell
12. A cake recipe asks you to whip egg whites and gently fold them into the batter. What is this step mainly intended to do?
Increase the batter’s fat content without adding oil
Prevent proteins from changing during baking
Add trapped air that can help create a lighter texture
Darken the cake through shell-pigment reactions
13. What is the main role of the twisted, cord-like chalazae inside an egg?
They help keep the yolk suspended near the center
They transfer air from the shell to the embryo
They separate the thick white from the thin white
They supply the shell with calcium
14. Which description best matches egg albumen?
The membrane directly surrounding the yolk
The protein-rich egg white that cushions the yolk
The mineral layer beneath the shell
The pocket of gas at the egg’s broad end
15. You crack an egg and notice a small blood spot on the yolk. What is its usual origin?
A tiny blood vessel rupturing while the egg formed
Pigment released as the yolk ages
A piece of the inner shell membrane
Air entering through a microscopic shell pore
16. An older uncracked egg rises in a bowl of water while a fresher one lies lower. What most directly explains the difference?
The older yolk has converted much of its fat into gas
The older egg has a larger air cell, increasing its buoyancy
The fresher shell absorbs water and becomes heavier
The fresher chalaza pulls the egg toward the bowl