Grade 7 · Science

7th grade Carbohydrates, lipids, proteins and nucleic acids worksheet

6 printable versionsBuilding Confidence10 questions · answer keyFree · no account

Level: Building Confidence · On Level · Challenge Me

When it’s done, scan the sheet with your phone and PencilGo marks it and picks the next one. Create a free account

Version

Carbohydrates, lipids, proteins and nucleic acids

Grade 7 Science Worksheet - Building Confidence

NameDate

Circle the best answer.

1.
In row C of the chart, which building block goes in the box marked ?, Ari?
- Glycerol and fatty acids
- Plant oils
- Amino acids
- Sugars such as glucose
2.
In row A of the chart, which building block goes in the box marked ?, Bo?
- Cell membranes
- Sugars such as glucose
- Amino acids
- Nucleotides
3.
In row D of the chart, which building block goes in the box marked ?, Esme?
- Nucleotides
- Starch grains
- Amino acids
- Glycerol and fatty acids
4.
In row C of the chart, which job goes in the box marked ?, Kira?
- Holds water in the soil
- Quick energy for cells
- Stores energy; forms cell membranes
- Builds and repairs cells
5.
In row D of the chart, which job goes in the box marked ?, Luz?
- Speeds up reactions, as enzymes do
- Stores energy for a long time
- Carries genetic instructions
- Forms plant cell walls
6.
Olive oil and canola oil are liquid at room temperature. Which family of molecules are they, Noah?
- Nucleic acids (DNA and RNA)
- Carbohydrates (sugars and starches)
- Lipids (fats and oils)
- Proteins (chains of amino acids)
7.
Soy, beans and nut butters are plant sources of amino acids. Which molecule do amino acids build, Pia?
- Fats
- DNA
- Proteins
- Starches
8.
A molecule is built from glycerol and fatty acids. Which kind of molecule is it, Ren?
- A starch
- A fat or oil (lipid)
- A protein
- A strand of DNA
9.
DNA and RNA carry a cell's instructions. Which family of molecules do they belong to, Tala?
- Lipids
- Nucleic acids
- Carbohydrates
- Proteins
10.
Saliva holds an enzyme that starts breaking down the starch in bread. Which kind of molecule is that enzyme, Zee?
- A fat
- A sugar crystal
- A protein
- A starch

7th grade Carbohydrates, lipids, proteins and nucleic acids worksheet – printable — Print: 1 2 3 4 5 6

About this worksheet

Carbohydrates, lipids, proteins and nucleic acids. Every version has 10 questions, and the answer key prints on the second page.

What your child will learn

I can name the building block of each of the four molecule families.
I can match each family to its main job in living things.
I can say which plant foods are rich in carbohydrates, lipids or protein.

Standard: none in middle school (HS-LS1-6 level)

Words to know

carbohydrate: Sugars and starches, built from sugar units; quick energy

lipid: Fats and oils, built from glycerol and fatty acids; stored energy, membranes

protein: A chain of amino acids that builds and repairs cells and does cell jobs

nucleic acid: DNA or RNA, a chain of nucleotides that carries instructions

enzyme: A protein that speeds up a reaction, like breaking down starch

Common mistakes

Your child matched a molecule with another family's building block. Sugars build carbohydrates, glycerol and fatty acids build fats, amino acids build proteins, and nucleotides build nucleic acids.

Your child gave one molecule another molecule's job. Carbohydrates give quick energy, lipids store energy and form membranes, proteins build and repair cells, nucleic acids carry instructions.

Your child matched a food to the wrong molecule. Starchy foods are rich in carbohydrates, plant oils are lipids, and soy and beans supply protein.

Questions parents ask

What is the most common mistake with carbohydrates, lipids, proteins and nucleic acids?

Your child matched a molecule with another family's building block. Sugars build carbohydrates, glycerol and fatty acids build fats, amino acids build proteins, and nucleotides build nucleic acids.

Are these 7th grade science worksheets free to print?

Yes. All 6 printable versions at each level are free to print, with the answer key, and no account is needed.

More grade 7 science

See all grade 7 science

Every sheet you scan goes into your child’s record: dated, marked and ready for the year-end portfolio. Homeschool records