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(2) Cells And Heredity
Test Description: Unit 1 Lesson 2: The Chemistry of Life
Instructions: Answer all questions to get your test result.
1) Which molecule is a source of energy, a store of energy in the body, and can mix with water?
A
nucleic acid
B
lipid
C
carbohydrate
D
chlorophyll
2) Which of these is the smallest?
A
cells
B
atoms
C
cell membranes
D
molecules
3) Nutritionists know that lipids are a vital nutrient that helps keep cells working properly. What is one way the cells in our bodies use lipids?
A
to form cell membranes
B
to make amino acids
C
to repair broken bones
D
to carry information in the cell
4) Some dog foods contain corn and wheat that provide the dog with carbohydrates. Why are carbohydrates important to cell processes?
A
They form cell membranes.
B
They help chemical processes happen.
C
They are a source of energy.
D
They make amino acids
5) DNA stores genetic information. What type of molecule is DNA?
A
nucleic acid
B
lipid
C
protein
D
carbohydrate
6) Which of these is one of the six most common elements found in the human body?
A
helium
B
oxygen
C
iron
D
water
7) Ms. Salis explains to her class that sodium (Na) and chlorine (Cl) atoms bond to make table salt (NaCl). Which is the best description of table salt?
A
It is a compound.
B
It is a cell.
C
It is a atom.
D
It is a element
8) When people eat foods high in proteins, such as meat, the body breaks down the proteins into smaller molecules. What is supplied to cells when the body breaks down proteins?
A
carbohydrates
B
phospholipids
C
nucleic acids
D
amino acids
9) What will happen if the concentration of water inside a cell is higher than the concentration of water outside a cell?
A
The cell will burst.
B
Water will move out of the cell.
C
The cell will remain unchanged.
D
Water will move in to the cell.
10) Which molecules make up proteins?
A
carbohydrates
B
amino acids
C
phospholipids
D
a nucleic acid
*select an answer for all questions
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