Carbohydrates, lipids, proteins and nucleic acids
Grade 7 Science Worksheet - Challenge Me
Circle the best answer.
A molecule is built from glucose units and gives plant cell walls their strength. Which molecule is it, Ari?
- Cellulose, a carbohydrate
- Starch, a stored carbohydrate
- Keratin, a protein
- Olive oil, a lipid
A molecule is built from nucleotides and kept in the nucleus. Which molecule is it, Bo?
Use the picture in question 1.
- DNA
- Starch
- A cell membrane lipid
- An enzyme protein
A molecule is built from glycerol and fatty acids and is liquid at room temperature. Which molecule is it, Esme?
Use the picture in question 1.
- Starch
- A solid fat, a lipid
- A protein
- A plant oil, a lipid
Which list holds only starchy plant foods, rich in carbohydrates, Jun?
- Olive oil, oats, potatoes
- Canola oil, sunflower oil, oats
- Brown rice, oats, potatoes
- Olive oil, canola oil, sunflower oil
Which list holds only plant sources of protein, according to MedlinePlus, Luz?
- Olive oil, beans, soy
- Apple juice, table sugar, oil
- Soy, beans, nut butters
- Canola oil, sunflower oil, soy
Ribosomes join amino acids in a set order to make a protein. Which molecule holds the instructions for that order, Milo?
- A lipid
- Starch
- DNA, a nucleic acid
- Another protein, an enzyme
MedlinePlus says two of these give the body energy. Which two, Pia?
- Water and DNA
- Fiber and nucleic acids
- Carbohydrates and fats
- Fiber and water
Ren says protein comes from animal foods alone. Agree or disagree?
- Disagree: soy and beans supply protein
- Agree: beans are just starch
- Disagree: protein comes from plant oils instead
- Agree: plants have no protein
Tala says DNA is a kind of protein. Agree or disagree?
- Disagree: DNA is a nucleic acid
- Agree: DNA and enzymes are one thing
- Agree: DNA is built from amino acids
- Disagree: DNA is a lipid
Zee says fats and oils are built from amino acids. Agree or disagree?
- Agree: amino acids build fats too
- Disagree: they are built from nucleotides
- Disagree: they come from glycerol and fatty acids
- Agree: oils are proteins