Unit 3 Lesson 2 Chemistry Of Life CONCEPTS And SKILLS: Question Preview (ID: 26666)

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Which of these is the most common element found in the human body?
a) nitrogen
b) carbon
c) oxygen
d) calcium

What forms much of the cell membrane and regulates water?
a) amino acids
b) nucleic acids
c) phospholipids
d) carbohydrates

When people eat foods such as meat, eggs, cheese and beans the body breaks down the food into smaller molecules called amino acids. What nutrient is supplied to cells of the body by these foods?
a) protein
b) water
c) carbohydrates

What molecules help build proteins?
a) amino acids
b) nucleic acids
c) water
d) carbohydrates

DNA contains genetic information and molecules that carry information cells to cells called nucleic acids. In which cell organelle would you find nucleic acids?
a) nucleus
b) cell membrane
c) cytoplasm

What are oxygen and hydrogen when they are not bonded together?
a) single atoms
b) elements
c) both atoms and elements
d) cells

What is/are the way(s) the cells in our bodies use lipids?
a) A. to form cell membranes
b) B. to store energy
c) Both A and B.

What is/are the way(s) the cells in our bodies use proteins?
a) A. to make amino acids
b) B. to repair broken bones
c) Both A and B.

Mrs. Amsler explains to her class that hydrogen (H) and oxygen (O) atoms bond to make water (H20). Which is the best description of water?
a) It is a cell.
b) It is an atom.
c) It is an element.
d) It is a compound.

Some dog foods contain corn and wheat that provide the dog with carbohydrates. Why are carbohydrates important to cell processes?
a) They make amino acids.
b) They form cell membranes.
c) They are a source of energy.
d) They help chemical processes happen.

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