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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
carbohydrate
B
nucleic acid
C
lipid
D
chlorophyll
2) Which of these is the smallest?
A
molecules
B
atoms
C
cells
D
cell membranes
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 make amino acids
B
to form cell membranes
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 help chemical processes happen.
B
They form cell membranes.
C
They are a source of energy.
D
They make amino acids
5) DNA stores genetic information. What type of molecule is DNA?
A
protein
B
lipid
C
carbohydrate
D
nucleic acid
6) Which of these is one of the six most common elements found in the human body?
A
helium
B
water
C
oxygen
D
iron
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 element
B
It is a cell.
C
It is a atom.
D
It is a compound.
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
nucleic acids
B
amino acids
C
phospholipids
D
carbohydrates
9) What will happen if the concentration of water inside a cell is higher than the concentration of water outside a cell?
A
Water will move in to the cell.
B
Water will move out of the cell.
C
The cell will remain unchanged.
D
The cell will burst.
10) Which molecules make up proteins?
A
carbohydrates
B
phospholipids
C
amino acids
D
a nucleic acid
*select an answer for all questions
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