Biol 1108 UCONN Final - Herrick
Exam questions and Answers Verified 100%
Correct
Why do mitochondria and chloroplasts have relatively small genomes?
A. Over time, much of their nucleic acid has migrated to the host cell nucleus B.
They lack non-coding DNA
C. Their bacterial ancestors had small genomes
D. They do not need many genes to function - ANSWER -A. Over time, much of
their nucleic acid has migrated to the host cell nucleus
How old are the earliest fossils of eukaryotes ?
A. 1.8 billion years
B. 1.2 billion years
C. 800 million years
D. 200 million years - ANSWER -A. 1.8 billion years
What causes amoeboid feeding cells of cellular slime molds to aggregate into a
large multicellular 'slug'?
A. starvation
B. mitosis
C. pollination
D. migration - ANSWER -A. starvation
Why is photosynthesis widely but discontinuously distributed throughout the
eukaryotic tree?
A. Photosynthesis was acquired early in evolutionary time but then lost
B. Photosynthesis was acquired multiple times through endosymbiosis
C. All eukaryotes are capable of photosynthesis, but it is repressed in most cases
D. Some eukaryotes evolved photosynthetic pathways separate from chloroplasts -
ANSWER -B. Photosynthesis was acquired multiple times through endosymbiosis
,Which of the following enabled eukaryotes to evolve complex life cycles and
programs of multicellular development?
A. complex patterns of gene regulation
B. binary fission
C. a dynamic cytoskeleton
D. sexual reproduction - ANSWER -A. complex patterns of gene regulation
Cells in the interior of complex multicellular organisms are able to respond to
environmental signals through:
A. receptors for signals sent from exterior cells that relay information about
environmental changes.
B. pH, temperature, or osmolarity receptors in the membranes of interior cells.
C. diffusion of environmental cues through the outer layers of the body.
D. receptors designed to detect directly changes in the external environment. -
ANSWER -A. receptors for signals sent from exterior cells that relay information
about environmental changes.
How can two cells of a complex multicellular organism have the same genome,
but markedly different structures and functions?
A. During differentiation, as cells become specialized, they lose portions of their
genome that are no longer needed.
B. Different genes are expressed in different cells.
C. Part of the process of differentiation of cells is to create mutations in the
genome.
D. Once differentiation begins, the genome no longer controls cellular functions. -
ANSWER -B. Different genes are expressed in different cells.
Which one of the following statements correctly describes features shared by
simple multicellular eukaryotes?
A. Cells adhere to one another; most of the cells are capable of a wide range of
functions, including reproduction; and the loss of one or more cells usually does
not lead to the death of the organism.
B. Cells adhere to one another and engage in extensive communication with one
another; most of the cells are capable of a wide range of functions, including
,reproduction; and the loss of one or more cells usually does not lead to the death of
the organism.
C. Cells adhere to one another and most of the cells are capable of a wide range of
functions except the ability to reproduce, which means that the loss of certain cells
usually leads to the death of the organism.
D. Cells adhere to one another loosely; most cells are capable of a wide range of
functions; cells are not limited in how large they can grow. - ANSWER -A. Cells
adhere to one another; most of the cells are capable of a wide range of functions,
including reproduction; and the loss of one or more cells usually does not lead to
the death of the organism.
Which one of the following is believed to be the major event that led to the
appearance of large complex animals on Earth?
A. the increase in atmospheric oxygen
B. the diversification of seaweeds in the ocean
C. the appearance of plants on land
D. the appearance of bulk flow systems - ANSWER -A. the increase in
atmospheric oxygen
The acquisition of traits necessary for complex multicellularity occurred
independently in plants and animals, but took place in a specific order. In what
order did these processes evolve?
A. cell adhesion molecules, a mechanism of communication, bulk flow
B. bulk flow, a mechanism of communication, cell adhesion molecules
C. a mechanism of communication, bulk flow, cell adhesion molecules
D. a mechanism of communication, cell adhesion molecules, bulk flow -
ANSWER -A. cell adhesion molecules, a mechanism of communication, bulk flow
For the "light" reaction to occur, an electron donor (____) and an ultimate
acceptor (______) are needed.
A. water; NADP+
B. ATP; NADPH
C. water; ATP
D. NADPH; water
E. water; NADPH - ANSWER -A. water; NADP+
, Which molecule is oxidized in the photosynthetic reaction?
A. CO2
B. H2O
C. C6H12O6
D. Sunlight - ANSWER -B. H2O
In terms of the evolution of photosynthesis, which process happened first?
A. endosymbiosis
B. mitochondrial membrane structure
C. chloroplast membrane structure
D. horizontal gene transfer - ANSWER -D. horizontal gene transfer
What is the most abundant protein on Earth?
A. Rubisco
B. CO2
C. 3-PGA
D. NADPH - ANSWER -A. Rubisco
What is the initial carbon input in the Calvin cycle?
A. C6H12O6
B. Triose phosphate
C. CO2
D. Rubisco - ANSWER -C. CO2
If the two guard cells of a stoma decrease their concentration of potassium (K+)
ions, what will happen to the corresponding pore?
A. The pore will close, allowing the diffusion of water vapor out of the leaf.
B. The pore will close, preventing the diffusion of CO2 out of the leaf.
C. The pore will open, allowing for the diffusion of CO2 into the leaf.
D. The pore will open, allowing for the diffusion of water vapor into the leaf. -
ANSWER -B. The pore will close, preventing the diffusion of CO2 out of the leaf.
If water molecules (H2O) suddenly stopped forming hydrogen bonds with one
another, how would water transport in vascular plants change (if at all)?
Exam questions and Answers Verified 100%
Correct
Why do mitochondria and chloroplasts have relatively small genomes?
A. Over time, much of their nucleic acid has migrated to the host cell nucleus B.
They lack non-coding DNA
C. Their bacterial ancestors had small genomes
D. They do not need many genes to function - ANSWER -A. Over time, much of
their nucleic acid has migrated to the host cell nucleus
How old are the earliest fossils of eukaryotes ?
A. 1.8 billion years
B. 1.2 billion years
C. 800 million years
D. 200 million years - ANSWER -A. 1.8 billion years
What causes amoeboid feeding cells of cellular slime molds to aggregate into a
large multicellular 'slug'?
A. starvation
B. mitosis
C. pollination
D. migration - ANSWER -A. starvation
Why is photosynthesis widely but discontinuously distributed throughout the
eukaryotic tree?
A. Photosynthesis was acquired early in evolutionary time but then lost
B. Photosynthesis was acquired multiple times through endosymbiosis
C. All eukaryotes are capable of photosynthesis, but it is repressed in most cases
D. Some eukaryotes evolved photosynthetic pathways separate from chloroplasts -
ANSWER -B. Photosynthesis was acquired multiple times through endosymbiosis
,Which of the following enabled eukaryotes to evolve complex life cycles and
programs of multicellular development?
A. complex patterns of gene regulation
B. binary fission
C. a dynamic cytoskeleton
D. sexual reproduction - ANSWER -A. complex patterns of gene regulation
Cells in the interior of complex multicellular organisms are able to respond to
environmental signals through:
A. receptors for signals sent from exterior cells that relay information about
environmental changes.
B. pH, temperature, or osmolarity receptors in the membranes of interior cells.
C. diffusion of environmental cues through the outer layers of the body.
D. receptors designed to detect directly changes in the external environment. -
ANSWER -A. receptors for signals sent from exterior cells that relay information
about environmental changes.
How can two cells of a complex multicellular organism have the same genome,
but markedly different structures and functions?
A. During differentiation, as cells become specialized, they lose portions of their
genome that are no longer needed.
B. Different genes are expressed in different cells.
C. Part of the process of differentiation of cells is to create mutations in the
genome.
D. Once differentiation begins, the genome no longer controls cellular functions. -
ANSWER -B. Different genes are expressed in different cells.
Which one of the following statements correctly describes features shared by
simple multicellular eukaryotes?
A. Cells adhere to one another; most of the cells are capable of a wide range of
functions, including reproduction; and the loss of one or more cells usually does
not lead to the death of the organism.
B. Cells adhere to one another and engage in extensive communication with one
another; most of the cells are capable of a wide range of functions, including
,reproduction; and the loss of one or more cells usually does not lead to the death of
the organism.
C. Cells adhere to one another and most of the cells are capable of a wide range of
functions except the ability to reproduce, which means that the loss of certain cells
usually leads to the death of the organism.
D. Cells adhere to one another loosely; most cells are capable of a wide range of
functions; cells are not limited in how large they can grow. - ANSWER -A. Cells
adhere to one another; most of the cells are capable of a wide range of functions,
including reproduction; and the loss of one or more cells usually does not lead to
the death of the organism.
Which one of the following is believed to be the major event that led to the
appearance of large complex animals on Earth?
A. the increase in atmospheric oxygen
B. the diversification of seaweeds in the ocean
C. the appearance of plants on land
D. the appearance of bulk flow systems - ANSWER -A. the increase in
atmospheric oxygen
The acquisition of traits necessary for complex multicellularity occurred
independently in plants and animals, but took place in a specific order. In what
order did these processes evolve?
A. cell adhesion molecules, a mechanism of communication, bulk flow
B. bulk flow, a mechanism of communication, cell adhesion molecules
C. a mechanism of communication, bulk flow, cell adhesion molecules
D. a mechanism of communication, cell adhesion molecules, bulk flow -
ANSWER -A. cell adhesion molecules, a mechanism of communication, bulk flow
For the "light" reaction to occur, an electron donor (____) and an ultimate
acceptor (______) are needed.
A. water; NADP+
B. ATP; NADPH
C. water; ATP
D. NADPH; water
E. water; NADPH - ANSWER -A. water; NADP+
, Which molecule is oxidized in the photosynthetic reaction?
A. CO2
B. H2O
C. C6H12O6
D. Sunlight - ANSWER -B. H2O
In terms of the evolution of photosynthesis, which process happened first?
A. endosymbiosis
B. mitochondrial membrane structure
C. chloroplast membrane structure
D. horizontal gene transfer - ANSWER -D. horizontal gene transfer
What is the most abundant protein on Earth?
A. Rubisco
B. CO2
C. 3-PGA
D. NADPH - ANSWER -A. Rubisco
What is the initial carbon input in the Calvin cycle?
A. C6H12O6
B. Triose phosphate
C. CO2
D. Rubisco - ANSWER -C. CO2
If the two guard cells of a stoma decrease their concentration of potassium (K+)
ions, what will happen to the corresponding pore?
A. The pore will close, allowing the diffusion of water vapor out of the leaf.
B. The pore will close, preventing the diffusion of CO2 out of the leaf.
C. The pore will open, allowing for the diffusion of CO2 into the leaf.
D. The pore will open, allowing for the diffusion of water vapor into the leaf. -
ANSWER -B. The pore will close, preventing the diffusion of CO2 out of the leaf.
If water molecules (H2O) suddenly stopped forming hydrogen bonds with one
another, how would water transport in vascular plants change (if at all)?
