Questions & Answers
Browse all 18 questions from the
Nature's Organic Chemistry study set below.
Each question shows the correct answer — select a study format above to practice interactively.
1
Which organic compound is primarily responsible for the green color in leaves and is essential for photosynthesis?
-
A
Carotene
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B
Chlorophyll
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C
Anthocyanin
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D
Xanthophyll
2
What is the chemical nature of the primary structural component of an insect's exoskeleton, known as chitin?
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A
Polysaccharide
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B
Protein
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C
Lipid
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D
Nucleic Acid
3
Which organic acid do ants produce and secrete as a chemical defense mechanism?
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A
Citric acid
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B
Lactic acid
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C
Formic acid
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D
Acetic acid
4
What class of organic compounds makes up the majority of the protective wax coating on plant leaves?
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A
Esters
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B
Hydrocarbons
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C
Alcohols
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D
Ethers
5
Which molecule is the primary organic energy storage compound found in the liver and muscles of animals?
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A
Cellulose
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B
Glycogen
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C
Starch
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D
Sucrose
6
What organic molecule is the main component of natural silk produced by silkworms?
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A
Keratin
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B
Collagen
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C
Fibroin
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D
Elastin
7
Which organic compound is found in high concentrations in citrus fruits and acts as a natural preservative?
-
A
Ascorbic acid
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B
Citric acid
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C
Malic acid
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D
Tartaric acid
8
What type of organic molecule forms the primary structure of wool and human hair?
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A
Chitin
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B
Keratin
-
C
Cellulose
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D
Lignin
9
Which organic molecule is responsible for the characteristic smell of a forest after rain, produced by soil bacteria?
-
A
Geosmin
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B
Limonene
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C
Ethanol
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D
Methane
10
What organic compound is the primary component of the cell walls in vascular plants, providing structural support?
-
A
Glycogen
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B
Chitin
-
C
Cellulose
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D
Amylose
11
Which organic substance acts as a natural antifreeze in the blood of some Antarctic fish?
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A
Glucose
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B
Glycoprotein
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C
Cholesterol
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D
Urea
12
Which fatty acid is commonly found in olive oil and is a key component of the Mediterranean diet?
-
A
Oleic acid
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B
Stearic acid
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C
Palmitic acid
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D
Linoleic acid
13
What organic pigment provides the bright orange color to carrots and flamingos?
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A
Chlorophyll
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B
Beta-carotene
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C
Anthocyanin
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D
Hemoglobin
14
Which organic compound do skunks spray as a defense mechanism, known for its sulfur-containing structure?
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A
Thiols
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B
Esters
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C
Ketones
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D
Aldehydes
15
What is the base organic chemical structure of the hormones estrogen and testosterone?
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A
Steroid
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B
Amino acid
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C
Triglyceride
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D
Monosaccharide
16
Which organic molecule serves as the primary building block for DNA and RNA in all living organisms?
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A
Nucleotide
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B
Fatty acid
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C
Monosaccharide
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D
Amino acid
17
What organic compound, found in the venom of bees, is responsible for the pain associated with a sting?
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A
Melittin
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B
Capsaicin
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C
Caffeine
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D
Nicotine
18
Which organic compound is the primary component of natural rubber obtained from rubber trees?
-
A
Isoprene
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B
Benzene
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C
Ethylene
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D
Acetone
