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
- Olive oil, a lipid
- Starch, a stored carbohydrate
- Keratin, a protein
A molecule is built from nucleotides and kept in the nucleus. Which molecule is it, Bo?
Use the picture in question 1.
- Starch
- An enzyme protein
- A cell membrane lipid
- DNA
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 plant oil, a lipid
- A solid fat, a lipid
- A protein
Which list holds only plant sources of protein, according to MedlinePlus, Luz?
- Apple juice, table sugar, oil
- Canola oil, sunflower oil, soy
- Olive oil, beans, soy
- Soy, beans, nut butters
Ribosomes join amino acids in a set order to make a protein. Which molecule holds the instructions for that order, Milo?
- A lipid
- DNA, a nucleic acid
- Another protein, an enzyme
- Starch
Chloroplasts make sugar from carbon dioxide and water. To store it, the plant joins many sugars into what, Noah?
- DNA
- Cell membranes
- Amino acids, joined into protein
- Starch, a carbohydrate
MedlinePlus says two of these give the body energy. Which two, Pia?
- Carbohydrates and fats
- Water and DNA
- Fiber and water
- Fiber and nucleic acids
Ren says protein comes from animal foods alone. Agree or disagree?
- Agree: beans are just starch
- Disagree: protein comes from plant oils instead
- Disagree: soy and beans supply protein
- Agree: plants have no protein
Tala says DNA is a kind of protein. Agree or disagree?
- Disagree: DNA is a lipid
- Disagree: DNA is a nucleic acid
- Agree: DNA and enzymes are one thing
- Agree: DNA is built from amino acids
Zee says fats and oils are built from amino acids. Agree or disagree?
- Agree: oils are proteins
- Agree: amino acids build fats too
- Disagree: they come from glycerol and fatty acids
- Disagree: they are built from nucleotides