Biology in Focus/Bio 101 NVCC Final Exam questions
with verified answers
1). Which of the following is a false statement regarding DNA?
A) Each chromosome has one very long DNA molecule with hundreds of
thousands of genes.
B) Every cell is enclosed by a membrane.
C) Every cell uses DNA as its genetic information.
D) All forms of life are composed of cells that have a membrane-enclosed nucleus.
E) DNA is the unit of inheritance that is transmitted from parent to offspring.
Ans✓✓-D) All forms of life are composed of cells that have a membrane-enclosed
nucleus.
In terms of the hierarchical organization of life, a bacterium is at the __________
level of organization, whereas a human is at the __________ level of organization.
A) single-celled organism; multicellular organism
B) single organelle; organism
C) organelle; organ system
D) single tissue; multicellular organism
E) tissue; organism Ans✓✓-A) single-celled organism; multicellular organism
The main source of energy for producers in an ecosystem is
A) light energy.
B) kinetic energy.
C) thermal energy.
D) chemical energy.
,E) ATP. Ans✓✓-A) light energy.
The lowest level of biological organization that can perform all the activities
required for life is the
A) organelle-for example, a chloroplast.
B) cell-for example, a skin cell.
C) tissue-for example, nervous tissue.
D) organ system-for example, the reproductive system.
E) organism-for example, an amoeba, dog, human, or maple tree. Ans✓✓-B) cell-
for example, a skin cell.
A type of protein critical to all cells is organic catalysts called
A) feedback activators.
B) feedback inhibitors.
C) enzymes.
D) metabolites.
E) nutrients. Ans✓✓-C) enzymes.
Prokaryotes are classified as belonging to two different domains. What are the
domains?
A) Bacteria and Eukarya
B) Archaea and Monera
C) Eukarya and Monera
D) Bacteria and Protista
E) Bacteria and Archaea Ans✓✓-E) Bacteria and Archaea
,Which of these provides evidence of the common ancestry of all life?
A) the ubiquitous use of catalysts by living systems
B) the universality of the genetic code
C) the structure of the nucleus
D) the structure of cilia
E) the structure of chloroplasts Ans✓✓-B) the universality of the genetic code
What is a hypothesis?
A) the same thing as an unproven theory
B) a tentative explanation that can be tested and is falsifiable
C) a verifiable observation sensed directly, or sensed indirectly with the aid of
scientific instrumentation
D) a fact based on qualitative data that is testable
E) a fact based on quantitative data that is falsifiable Ans✓✓-B) a tentative
explanation that can be tested and is falsifiable
About 25 of the 92 natural elements are known to be essential to life. Which four
of these 25 elements make up approximately 96% of living matter?
A) carbon, sodium, chlorine, nitrogen
B) carbon, sulfur, phosphorus, hydrogen
C) oxygen, hydrogen, calcium, sodium
D) carbon, hydrogen, nitrogen, oxygen
E) carbon, oxygen, sulfur, calcium Ans✓✓-D) carbon, hydrogen, nitrogen, oxygen
, The mass number of an element can be easily approximated by adding together
the number of __________ in an atom of that element.
A) protons and neutrons
B) energy levels
C) protons and electrons
D) neutrons and electrons
E) isotopes Ans✓✓-A) protons and neutrons
What is the approximate atomic mass of an atom with 16 neutrons, 15 protons,
and 15 electrons?
A) 15 daltons
B) 16 daltons
C) 30 daltons
D) 31 daltons
E) 46 daltons Ans✓✓-D) 31 daltons
Which of the following best describes the relationship between the atoms
described below?
Atom 1 Atom 2
31/15P 32/15P
A) They contain 31 and 32 electrons, respectively.
B) They are both phosphorus cations.
C) They are both phosphorus anions.
D) They are both isotopes of phosphorus.
E) They contain 31 and 32 protons, respectively. Ans✓✓-D) They are both
isotopes of phosphorus.
with verified answers
1). Which of the following is a false statement regarding DNA?
A) Each chromosome has one very long DNA molecule with hundreds of
thousands of genes.
B) Every cell is enclosed by a membrane.
C) Every cell uses DNA as its genetic information.
D) All forms of life are composed of cells that have a membrane-enclosed nucleus.
E) DNA is the unit of inheritance that is transmitted from parent to offspring.
Ans✓✓-D) All forms of life are composed of cells that have a membrane-enclosed
nucleus.
In terms of the hierarchical organization of life, a bacterium is at the __________
level of organization, whereas a human is at the __________ level of organization.
A) single-celled organism; multicellular organism
B) single organelle; organism
C) organelle; organ system
D) single tissue; multicellular organism
E) tissue; organism Ans✓✓-A) single-celled organism; multicellular organism
The main source of energy for producers in an ecosystem is
A) light energy.
B) kinetic energy.
C) thermal energy.
D) chemical energy.
,E) ATP. Ans✓✓-A) light energy.
The lowest level of biological organization that can perform all the activities
required for life is the
A) organelle-for example, a chloroplast.
B) cell-for example, a skin cell.
C) tissue-for example, nervous tissue.
D) organ system-for example, the reproductive system.
E) organism-for example, an amoeba, dog, human, or maple tree. Ans✓✓-B) cell-
for example, a skin cell.
A type of protein critical to all cells is organic catalysts called
A) feedback activators.
B) feedback inhibitors.
C) enzymes.
D) metabolites.
E) nutrients. Ans✓✓-C) enzymes.
Prokaryotes are classified as belonging to two different domains. What are the
domains?
A) Bacteria and Eukarya
B) Archaea and Monera
C) Eukarya and Monera
D) Bacteria and Protista
E) Bacteria and Archaea Ans✓✓-E) Bacteria and Archaea
,Which of these provides evidence of the common ancestry of all life?
A) the ubiquitous use of catalysts by living systems
B) the universality of the genetic code
C) the structure of the nucleus
D) the structure of cilia
E) the structure of chloroplasts Ans✓✓-B) the universality of the genetic code
What is a hypothesis?
A) the same thing as an unproven theory
B) a tentative explanation that can be tested and is falsifiable
C) a verifiable observation sensed directly, or sensed indirectly with the aid of
scientific instrumentation
D) a fact based on qualitative data that is testable
E) a fact based on quantitative data that is falsifiable Ans✓✓-B) a tentative
explanation that can be tested and is falsifiable
About 25 of the 92 natural elements are known to be essential to life. Which four
of these 25 elements make up approximately 96% of living matter?
A) carbon, sodium, chlorine, nitrogen
B) carbon, sulfur, phosphorus, hydrogen
C) oxygen, hydrogen, calcium, sodium
D) carbon, hydrogen, nitrogen, oxygen
E) carbon, oxygen, sulfur, calcium Ans✓✓-D) carbon, hydrogen, nitrogen, oxygen
, The mass number of an element can be easily approximated by adding together
the number of __________ in an atom of that element.
A) protons and neutrons
B) energy levels
C) protons and electrons
D) neutrons and electrons
E) isotopes Ans✓✓-A) protons and neutrons
What is the approximate atomic mass of an atom with 16 neutrons, 15 protons,
and 15 electrons?
A) 15 daltons
B) 16 daltons
C) 30 daltons
D) 31 daltons
E) 46 daltons Ans✓✓-D) 31 daltons
Which of the following best describes the relationship between the atoms
described below?
Atom 1 Atom 2
31/15P 32/15P
A) They contain 31 and 32 electrons, respectively.
B) They are both phosphorus cations.
C) They are both phosphorus anions.
D) They are both isotopes of phosphorus.
E) They contain 31 and 32 protons, respectively. Ans✓✓-D) They are both
isotopes of phosphorus.
