Back to Library

Organic Chemistry in the Natural World

Organic Chemistry

A collection of questions exploring organic compounds found in biological systems and the environment.

science chemistry nature biology

15 Questions Medium Ages 12+ Jul 23, 2026

Practice Test PDF Answer Key PDF

Choose a Study Format

Quiz

Test your knowledge with multiple-choice questions and instant feedback.

Flashcards

Flip through cards to review terms, definitions and key concepts.

True or False

Quickly decide if statements are true or false to reinforce understanding.

Match Game

Race against time to match questions with their correct answers.

Study Guide

Read through all topics and answers as a comprehensive study reference.

Listen Mode

Listen to questions and answers read aloud — great for audio learners on the go.

Embed This Study Set

Add this interactive study set to your website or blog — all 6 formats included.

<div data-quixly-id="4575"></div>
<script src="https://www.quixlylearn.com/assets/embed/widget.js"></script>

Learn more about embedding →

About this Study Set

This study set covers Organic Chemistry through 15 practice questions. A collection of questions exploring organic compounds found in biological systems and the environment. Every question includes the correct answer so you can learn as you go — pick any format above to get started.

Questions & Answers

Browse all 15 questions from the Organic Chemistry in the Natural World 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 structural integrity of cell walls in terrestrial plants?

A Glycogen
B Cellulose
C Chitin
D Starch

2 What is the primary organic acid found in the defensive spray of ants, known as formic acid?

A Methanoic acid
B Ethanoic acid
C Propanoic acid
D Butanoic acid

3 Which organic pigment is essential for photosynthesis in plants by absorbing light energy?

A Hemoglobin
B Melanin
C Chlorophyll
D Carotene

4 Chitin is an organic polymer that provides structural support in which of the following?

A Bacterial cell walls
B Plant leaves
C Insect exoskeletons
D Human skin

5 What is the main chemical component of natural silk produced by silkworms?

A Keratin
B Collagen
C Fibroin
D Elastin

6 Which organic molecule is used by many animals as the primary long-term energy storage?

A Glucose
B Triglycerides
C Amino acids
D Nucleotides

7 The characteristic scent of many flowers is produced by organic compounds belonging to which chemical class?

A Esters
B Alkanes
C Amines
D Halides

8 Which protein is the most abundant organic compound in the skin and connective tissues of mammals?

A Myosin
B Actin
C Collagen
D Insulin

9 Beeswax is chemically classified primarily as which type of organic substance?

A Ether
B Ester
C Ketone
D Aldehyde

10 Which organic compound is the primary component of natural gas produced by the decomposition of organic matter in wetlands?

A Propane
B Ethane
C Methane
D Butane

11 What class of organic compounds provides the characteristic 'fishy' odor in decaying marine organisms?

A Amines
B Alcohols
C Carboxylic acids
D Phenols

12 Which organic molecule acts as the genetic blueprint in all living organisms?

A ATP
B Deoxyribonucleic acid
C Hemoglobin
D Glucose

13 What is the chemical name of the organic compound responsible for the heat sensation in chili peppers?

A Capsaicin
B Limonene
C Menthol
D Caffeine

14 Which organic compound acts as a natural antifreeze in the blood of some Antarctic fish?

A Glucose
B Glycoprotein
C Cholesterol
D Ethanol

15 Lignin is an organic polymer that provides rigidity to which specific part of a tree?

A Fruit
B Flower petals
C Xylem tissue
D Root hairs

📱

Study on the go

Download Quixly and access all study formats on your phone — anywhere, anytime.