BS 161 Exam #3: Questions And Correct Answers
(Rated A+)
During photosynthesis,__________ is reduced to _____________ Right Ans - CO2
is reduced to sugar
In plants, the ultimate electron donor in photosynthesis is Right Ans -
water
Which of the following sequences correctly represents the flow of energy
through living systems? Right Ans - light - photosynthesis - carbohydrate -
cellular respiration - ATP - heat
In animal cells, most ATP synthesis takes place in
mitochondria, but in plant cells, most of the ATP used by plant cells is made in
the chloroplasts. Right Ans - false
A new experimental pesticide is being tested by a large agricultural
chemical company. An unfortunate side effect in plants treated with
this new product is a decrease in ATP production in the chloroplasts.
(Interestingly, production of ATP in the mitochondria is unaffected.)
Given this observation, which of the following would you expect to be
directly affected by the new pesticide?
A. the synthesis of triose phosphates from 3-phosphoglycerate
B. the transport of electrons along the photosynthetic electron
transport chain
C. the carboxylation of RuBP by rubisco
D. the oxidation of RuBP by rubisco Right Ans - A. the synthesis of triose
phosphates from 3-phosphoglycerate
Which of the following is not part of the general response of cells
during cellular communication?
A. The cell does not return to its normal activities after the signal has
exerted its effect.
B. Receptors on the outside of the cell bind to specific signal molecules.
C. A cell-surface receptor molecule becomes activated by binding to a
molecular signal.
D. An activated cell-surface receptor transfers the signal to the interior
, of the cell.
E. The signal is transmitted inside the cell and amplified as a series of
proteins are activated in sequence, affecting cellular activities
according to the type of signal involved. Right Ans - A. The cell does not
return to its normal activities after the signal has
exerted its effect.
Choose from the following terms to fill in the blanks in the correct order.
A. ligand
B. signaling cell
C. receptor
D. responding cell
In communication between cells, the _____________________ produces the
signaling molecule, also known as the ________________; the
______________________ produces the _______________, to which the signaling
molecule binds.
A. B, A, D, C
B. A, B, C, D
C. B, C, A, D
D. D, C, B, A Right Ans - A. B, A, D, C
Which of the following types of cellular activities can be a response to cell
signaling?
A. Cell division is triggered.
B. Gene expression patterns are changed.
C. Enzyme activities are changed.
D. Cell signals are released to communicate with other cells.
E. All of these choices are correct Right Ans - A. Cell division is triggered.
Which type of cell signaling does not rely on the diffusion of a chemical
signal molecule?
A. contact-dependent
B. paracrine
C. autocrine
D. endocrine
E. All of these choices are correct. Right Ans - A. contact-dependent
You create a cell that has a mutation in a receptor protein that binds a
signaling molecule, which is also produced by the same cell. When you
(Rated A+)
During photosynthesis,__________ is reduced to _____________ Right Ans - CO2
is reduced to sugar
In plants, the ultimate electron donor in photosynthesis is Right Ans -
water
Which of the following sequences correctly represents the flow of energy
through living systems? Right Ans - light - photosynthesis - carbohydrate -
cellular respiration - ATP - heat
In animal cells, most ATP synthesis takes place in
mitochondria, but in plant cells, most of the ATP used by plant cells is made in
the chloroplasts. Right Ans - false
A new experimental pesticide is being tested by a large agricultural
chemical company. An unfortunate side effect in plants treated with
this new product is a decrease in ATP production in the chloroplasts.
(Interestingly, production of ATP in the mitochondria is unaffected.)
Given this observation, which of the following would you expect to be
directly affected by the new pesticide?
A. the synthesis of triose phosphates from 3-phosphoglycerate
B. the transport of electrons along the photosynthetic electron
transport chain
C. the carboxylation of RuBP by rubisco
D. the oxidation of RuBP by rubisco Right Ans - A. the synthesis of triose
phosphates from 3-phosphoglycerate
Which of the following is not part of the general response of cells
during cellular communication?
A. The cell does not return to its normal activities after the signal has
exerted its effect.
B. Receptors on the outside of the cell bind to specific signal molecules.
C. A cell-surface receptor molecule becomes activated by binding to a
molecular signal.
D. An activated cell-surface receptor transfers the signal to the interior
, of the cell.
E. The signal is transmitted inside the cell and amplified as a series of
proteins are activated in sequence, affecting cellular activities
according to the type of signal involved. Right Ans - A. The cell does not
return to its normal activities after the signal has
exerted its effect.
Choose from the following terms to fill in the blanks in the correct order.
A. ligand
B. signaling cell
C. receptor
D. responding cell
In communication between cells, the _____________________ produces the
signaling molecule, also known as the ________________; the
______________________ produces the _______________, to which the signaling
molecule binds.
A. B, A, D, C
B. A, B, C, D
C. B, C, A, D
D. D, C, B, A Right Ans - A. B, A, D, C
Which of the following types of cellular activities can be a response to cell
signaling?
A. Cell division is triggered.
B. Gene expression patterns are changed.
C. Enzyme activities are changed.
D. Cell signals are released to communicate with other cells.
E. All of these choices are correct Right Ans - A. Cell division is triggered.
Which type of cell signaling does not rely on the diffusion of a chemical
signal molecule?
A. contact-dependent
B. paracrine
C. autocrine
D. endocrine
E. All of these choices are correct. Right Ans - A. contact-dependent
You create a cell that has a mutation in a receptor protein that binds a
signaling molecule, which is also produced by the same cell. When you
