Home Quiz "Caffeine Challenge: Test Your Knowledge on the World's Favorite Stimulant!
Preview (10 questions)
1 Question
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Q.

What type of compound is caffeine?

Alkaloid

Protein

Fat

Carbohydrate
2 Question
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Q.

How does caffeine primarily work in the body?

By increasing serotonin levels

By blocking adenosine receptors

By reducing dopamine production

By increasing the oxygen supply to the brain
3 Question
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Q.

Which organ primarily metabolizes caffeine?

Heart

Eyes

Liver

Brain
4 Question
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Q.

How long does it typically take for caffeine to reach peak levels in the bloodstream?

between 15 and 120 minutes

between 3 hours

20 minutes

1 hour
5 Question
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Q.

Which type of coffee generally has the most caffeine per serving?

Robusta beans

Espresso

Instant coffee

Decaf coffee
6 Question
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Q.

Which is known as the best-known source of caffeine?

coffee bean

milk

orange juice

none of the mentioned
7 Question
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Q.

State true or false.

Caffeine has both positive and negative health effects.

true

false
8 Question
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Q.

Below the following, How does caffeine affect the body?

Makes it easier to focus

Increased breathing and heart rate

Raises the blood pressure

All the mentioned
9 Question
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Q.

How much caffeine does the average U.S. adult caffeine-drinker have in a day?

120 mg

135 mg

110 mg

90 mg
10 Question
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Q.

To which class does caffeine belong?

Methylxanthine class

Nitrate class

Glycerol

Phosphate