Biochemistry Exam | 90 Questions and Answers
Verifies 100% Correct
The four most abundant chemical elements in living systems are:
a)sodium, potassium, nitrogen and
sulfur.
b)carbon, nitrogen, oxygen and potassium.
c)hydrogen, oxygen, sulfur and phosphorus.
d)hydrogen, carbon, nitrogen and oxygen.
e)sodium, potassium, carbon and oxygen.
D
Nearly all proteins contain:
a)cobalt.
b)sulfur.
c)phosphorus.
d)selenium.
e)none of the above.
B
Which of the following statements is FALSE?
a)Proteins are the only biological polymer that can catalyze biochemical reactions.
b)Proteins can transport molecules within cells and between cells.
c)Proteins can be structural components of cells.
d)Proteins can transmit signals between cells.
e)Proteins can be both hormones and hormone receptors.
A
,Which of the following statements about biomolecules is true?
a)Lipids are responsible for the transport of substances into the cell.
b)Nucleic acids (DNA/RNA) are responsible for information storage, transmission, and
expression.
c)Carbohydrates are responsible for the catalysis of chemical reactions.
d)Proteins are broken down as a primary fuel source.
B
Biochemistry is focused on four biological molecules: proteins, carbohydrates, nucleic
acids, and lipids. Of these, which are NOT polymers?
a)carbohydrates
b)nucleic acids
c)proteins
d)lipids
D
Homeostasis is __________.
a)the same as equilibrium
b)the ability to maintain nutrient concentrations equal on both sides of the cell
membrane
c)the ability to maintain cellular conditions over time
d)a function of proteins
C
Which of the following is NOT a characteristic of a living system?
a)the ability to replicate and regenerate
b)the ability to resist change over generations of progeny
c)the ability to couple energy-releasing reactions with energy-requiring processes,
,thereby allowing the creation of complex molecules
d)the ability to respond to changes in the environment
B
_____ are surface appendages that allow a bacterium to stick to a surface.
a)Flagella
b)Ribosomes
c)Fimbriae
d)Cell walls
e)Mitochondria
C
What is the function of a bacterium's capsule?
a)protein synthesis
b)DNA storage
c)adhesion
d)protection
e)propulsion
D
Where is a bacterial cell's DNA found?
a)ribosomes
b)nucleus
c)peroxisome
d)nucleoid region
e)capsule
D
, In a bacterium, where are proteins synthesized?
a)ribosomes
b)nucleus
c)peroxisome
d)nucleoid region
e)capsule
A
What name is given to the rigid structure, found outside the plasma membrane, that
surrounds and supports the bacterial cell?
a)capsule
b)pili
c)cell wall
d)flagella
e)nucleoid region
C
The _____ is the bacterial structure that acts as a selective barrier, allowing nutrients
to enter the cell and wastes to leave the cell.
a)plasma membrane
b)nucleoid region
c)ribosome
d)pili
e)cell wall
A
The Beadle and Tatum experiments were based on all of the following assumptions
except that _______.
Verifies 100% Correct
The four most abundant chemical elements in living systems are:
a)sodium, potassium, nitrogen and
sulfur.
b)carbon, nitrogen, oxygen and potassium.
c)hydrogen, oxygen, sulfur and phosphorus.
d)hydrogen, carbon, nitrogen and oxygen.
e)sodium, potassium, carbon and oxygen.
D
Nearly all proteins contain:
a)cobalt.
b)sulfur.
c)phosphorus.
d)selenium.
e)none of the above.
B
Which of the following statements is FALSE?
a)Proteins are the only biological polymer that can catalyze biochemical reactions.
b)Proteins can transport molecules within cells and between cells.
c)Proteins can be structural components of cells.
d)Proteins can transmit signals between cells.
e)Proteins can be both hormones and hormone receptors.
A
,Which of the following statements about biomolecules is true?
a)Lipids are responsible for the transport of substances into the cell.
b)Nucleic acids (DNA/RNA) are responsible for information storage, transmission, and
expression.
c)Carbohydrates are responsible for the catalysis of chemical reactions.
d)Proteins are broken down as a primary fuel source.
B
Biochemistry is focused on four biological molecules: proteins, carbohydrates, nucleic
acids, and lipids. Of these, which are NOT polymers?
a)carbohydrates
b)nucleic acids
c)proteins
d)lipids
D
Homeostasis is __________.
a)the same as equilibrium
b)the ability to maintain nutrient concentrations equal on both sides of the cell
membrane
c)the ability to maintain cellular conditions over time
d)a function of proteins
C
Which of the following is NOT a characteristic of a living system?
a)the ability to replicate and regenerate
b)the ability to resist change over generations of progeny
c)the ability to couple energy-releasing reactions with energy-requiring processes,
,thereby allowing the creation of complex molecules
d)the ability to respond to changes in the environment
B
_____ are surface appendages that allow a bacterium to stick to a surface.
a)Flagella
b)Ribosomes
c)Fimbriae
d)Cell walls
e)Mitochondria
C
What is the function of a bacterium's capsule?
a)protein synthesis
b)DNA storage
c)adhesion
d)protection
e)propulsion
D
Where is a bacterial cell's DNA found?
a)ribosomes
b)nucleus
c)peroxisome
d)nucleoid region
e)capsule
D
, In a bacterium, where are proteins synthesized?
a)ribosomes
b)nucleus
c)peroxisome
d)nucleoid region
e)capsule
A
What name is given to the rigid structure, found outside the plasma membrane, that
surrounds and supports the bacterial cell?
a)capsule
b)pili
c)cell wall
d)flagella
e)nucleoid region
C
The _____ is the bacterial structure that acts as a selective barrier, allowing nutrients
to enter the cell and wastes to leave the cell.
a)plasma membrane
b)nucleoid region
c)ribosome
d)pili
e)cell wall
A
The Beadle and Tatum experiments were based on all of the following assumptions
except that _______.
