Question 8(multiple choice worth 2 points)
(02.02 lc)

what did louis pasteur's experiment contribute to cell theory?

the fact that all organisms consist of cells
the evidence that cells are the basic unit for all organisms
the proposal that cells are living organisms

the proof that cells only come from other cells
question 9(multiple choice worth 2 points)
(02.01h hc)

what can you conclude about the advantage of the double-layer arrangement of a cell membrane?

the cell requires a barrier between itself and its environment.
the cell requires the ability to digest and eliminate enzymes.
the cell requires a means to store starches and glucose.
the cell requires a structure for eliminating waste.
question 10(multiple choice worth 2 points)
(02.01h lc)

what group of organic molecules is made up of a sequence of an amion group, a carboxyl group, a hydrogen atom and a side chain bonded to the central carbon atom?

proteins
carbohydrates
nucleic acids
lipids
question 11(multiple choice worth 2 points)
(02.05 mc)

cellular respiration is a process involving the breakdown of glucose molecules in order to generate energy for cellular activities. given the general reaction below, which of the following best describes the products labeled x and y?

c6h12o6 + o2 → + + energy

the products are co (carbon monoxide) and h2o2 (hydrogen peroxide), which then decompose into carbon dioxide (co2) and water (h2o).
the products are h2o (water) and co2 (carbon dioxide), which then undergo anaerobic respiration.
the products are co2 (carbon dioxide) and h2o (water), which then become the reactants for photosynthesis.
the products are o2 (oxygen) and h2o (water), which are then used for growth and to keep the organism hydrated.
question 12(multiple choice worth 2 points)
(02.02 mc)

m. j. schleiden shifted the scientific community's attention to cellular processes with his

attention to disproving spontaneous generation
publication of ideas on cell generation
theories on the division of cells
claim that cells were the basic unit of all plant matter
question 13(multiple choice worth 2 points)
(02.01h hc)

cellulose is a carbohydrate with an alternating pattern of glucose molecules. how would plants be affected if cellulose did not have this alternating pattern?

plant would not be able to store energy.
plants would lack the ability to reproduce.
plants would lack stability and strength.
plants would not be able to produce chlorophyll.
question 14(multiple choice worth 2 points)
(02.03 hc)

studies have shown that some medications can damage mitochondria. which of the following would you predict to be the most likely long-term effect on an organism with damaged mitochondria?

proteins would not be modified after being synthesized, and the organism would be unable to grow.
the organism would suffer as its cells would be less able to provide the energy needed to carry out life functions.
substances would not be able to enter or leave the cells of the organism, and affected cells would eventually burst.
errors would be made during dna replication, and the organism would be more likely to develop cancer.
question 15(multiple choice worth 2 points)
(02.03 mc)

the quantity of each type of organelle in a cell varies depending on the tasks the individual cell must perform. if a scientist needed to find cells that contained a large number of chloroplasts, where would be the best place to look?

the stem of a young tree
a flower petal in partial sunlight
a leaf growing in full sunlight
the stem of a mature tree

question 16(multiple choice worth 2 points)
(02.02 mc)

which of the following best describes the relationship between the structure of the cell membrane and its function?
the cell membrane folds upon itself easily, which facilitates cellular reproduction by mitosis.
the membrane is rigid and inflexible preventing the movement of substances across the cell membrane.
the outer layer of the membrane is hydrophilic, which allows water to flow in and out of the cell easily to eliminate waste.
the proteins that are embedded in the cell membrane act as channels to transport substances in and out of the cell.

question 17(multiple choice worth 2 points)
(02.01 mc)

which of the following best describes the relationship between the shape of enzymes and the reactions they catalyze?

the shape of an enzyme depends on the reaction that it needs to catalyze.
enzymes with more active sites can catalyze several reactions at once.
the shape of an enzyme determines which reaction it can catalyze.
enzymes change shape after they catalyze a reaction and become waste products.