BSCS Biology: A Molecular Approach

Chapter 1: The Chemistry of Life

Reactions in Living Cells

1.
What type of chemical bonds between atoms are shown in the illustration of the hydrogen gas and water molecules?

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A)covalent
B)hydrogen
C)structural
D)ionic
2.
What is the name of the law stating that matter is neither created nor destroyed in chemical reactions?
A)The law of activation energy.
B)The law of creationism.
C)The law of material destructivity.
D)The law of conservation of matter.
3.
A (an) _____ is an atom or molecule that has acquired a positive or negative charge as a result of gaining or losing electrons.
A)ion
B)bond
C)compound
D)element
4.
Which of the following is the structural formula for the hydrogen molecule?
A)H20
B)H-H
C)NH3
D)H2
5.
The pH scale measures the level of which ions in a solution?
A)potassium and calcium
B)sodium and chloride
C)potassium and hydrogen
D)hydrogen and hydroxide
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