BIOCHEMISTRY QUICK REVISION
QUESTIONS AND THEIR ANSWERS
How many elements have been found to occur in
nature?
92
Living organisms are made up of energy and matter.
True or false?
True
Why is chemistry important in the study of biology?
The body is composed of chemical elements.
Chemical reactions occur in the body.
Chemistry studies matter and energy.
The most abundant elements in the body are _____.
hydrogen, carbon, nitrogen, oxygen
This element is needed for cellular respiration.
oxygen
Elements abundant in the body are not abundant on
Earth. True or False?
False
What French scientist is known as the "Father of
Modern Chemistry" and showed that organisms are
composed of the same chemical elements as
nonliving things?
Antoine Lavoisier
T or F. Each element consists of only one type of atom
True
, Any particular element can always be identified by its
_____.
number of protons
The subatomic particles/units that govern potential
chemical reactions among elements are
electrons
Which statement is correct?
The number of electrons of a neutral atom always
equals the number of protons.
The number of neutrons always equals the number of
protons.
The number of neutrons always equals the number of
electrons.
Atomic weight is identical to atomic mass.
The number of electrons of a neutral atom always equals
the number of protons.
Atomic number is the number of an atom's _____.
protons
Naturally occurring compounds in the earth are called
_____.
minerals
A molecule of one atom of carbon and two atoms of
oxygen would be written _____.
CO2
CO2 is an example of a(n) _____.
molecules and molecular compounds
Nitrogen gas consists of _____.
a molecule of two nitrogen atoms
QUESTIONS AND THEIR ANSWERS
How many elements have been found to occur in
nature?
92
Living organisms are made up of energy and matter.
True or false?
True
Why is chemistry important in the study of biology?
The body is composed of chemical elements.
Chemical reactions occur in the body.
Chemistry studies matter and energy.
The most abundant elements in the body are _____.
hydrogen, carbon, nitrogen, oxygen
This element is needed for cellular respiration.
oxygen
Elements abundant in the body are not abundant on
Earth. True or False?
False
What French scientist is known as the "Father of
Modern Chemistry" and showed that organisms are
composed of the same chemical elements as
nonliving things?
Antoine Lavoisier
T or F. Each element consists of only one type of atom
True
, Any particular element can always be identified by its
_____.
number of protons
The subatomic particles/units that govern potential
chemical reactions among elements are
electrons
Which statement is correct?
The number of electrons of a neutral atom always
equals the number of protons.
The number of neutrons always equals the number of
protons.
The number of neutrons always equals the number of
electrons.
Atomic weight is identical to atomic mass.
The number of electrons of a neutral atom always equals
the number of protons.
Atomic number is the number of an atom's _____.
protons
Naturally occurring compounds in the earth are called
_____.
minerals
A molecule of one atom of carbon and two atoms of
oxygen would be written _____.
CO2
CO2 is an example of a(n) _____.
molecules and molecular compounds
Nitrogen gas consists of _____.
a molecule of two nitrogen atoms
