Questions & Answers
Browse all 18 questions from the
Amazing Molecules of Life study set below.
Each question shows the correct answer — select a study format above to practice interactively.
1
What are the tiny building blocks that make up all living things?
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A
Atoms
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B
Molecules
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C
Cells
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D
Organs
2
Which type of molecule is the main source of energy for our bodies, found in foods like bread and pasta?
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A
Proteins
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B
Fats
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C
Carbohydrates
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D
Vitamins
3
Proteins are made up of smaller units called:
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A
Sugars
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B
Fatty acids
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C
Amino acids
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D
Nucleotides
4
What molecule carries the instructions for building and operating a living thing, like a recipe book?
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A
RNA
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B
DNA
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C
ATP
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D
Glucose
5
Where does a plant get the energy to make its own food through photosynthesis?
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A
Soil
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B
Water
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C
Sunlight
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D
Oxygen
6
What is the name for the special molecules in our bodies that help speed up chemical reactions, like tiny helpers?
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A
Hormones
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B
Enzymes
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C
Antibodies
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D
Minerals
7
Which important molecule is found in fruits and vegetables and helps our bodies stay healthy and fight off sickness?
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A
Sugar
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B
Salt
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C
Vitamins
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D
Water
8
What is the main liquid that makes up a large part of our bodies and is essential for life?
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A
Milk
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B
Juice
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C
Oil
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D
Water
9
Fats are important for storing energy and protecting our organs. What are the building blocks of fats called?
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A
Amino acids
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B
Sugars
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C
Fatty acids and glycerol
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D
Nucleotides
10
What is the name of the molecule that acts like the 'energy currency' for cells, powering their activities?
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A
Glucose
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B
DNA
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C
ATP
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D
Protein
11
What process do plants use to convert light energy into chemical energy in the form of sugar?
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A
Respiration
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B
Digestion
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C
Photosynthesis
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D
Fermentation
12
Which of these is a simple sugar that is a primary source of energy for cells?
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A
Starch
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B
Cellulose
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C
Fructose
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D
Protein
13
What are the basic units of nucleic acids, like DNA and RNA, called?
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A
Amino acids
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B
Fatty acids
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C
Nucleotides
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D
Sugars
14
What is the role of enzymes in living organisms?
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A
Storing energy
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B
Building new cells
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C
Speeding up chemical reactions
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D
Carrying genetic information
15
Which group of molecules includes things like cholesterol and sex hormones?
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A
Carbohydrates
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B
Proteins
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C
Nucleic acids
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D
Lipids (Fats)
16
What gas do living things breathe in for energy production, and what gas do they breathe out?
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A
Oxygen in, Carbon dioxide out
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B
Carbon dioxide in, Oxygen out
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C
Nitrogen in, Oxygen out
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D
Oxygen in, Nitrogen out
17
What are the main components that make up a cell membrane, controlling what enters and leaves the cell?
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A
Proteins and carbohydrates
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B
Lipids (fats) and proteins
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C
Nucleic acids and lipids
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D
Water and minerals
18
When we eat food, our bodies break it down into smaller molecules. What is this process called?
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A
Photosynthesis
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B
Digestion
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C
Respiration
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D
Synthesis
