Cells Test
Which of the following cube shaped cells would be most efficient in removing waste by diffusion
10 um
Site of modification and packaging of proteins and lipids prior to export from the cell
Golgi apparatus
Which of the following statements best predicts the effect of increasing the permeability of the mitochondrial membrane's to large molecules
ATP production will decrease because of an increase in the occurrence of uncontrolled chemical reactions
Which of the following best describes the numbered areas of a hydrophobic/Philic chain
Areas one and three are polar since the membrane molecules are aligned with water molecules
When a substance moves across the plasma membrane along a concentration gradient at a rate faster than would be expected by simple diffusion alone but without the expenditure of metabolic energy the process is best described as
Facilitated diffusion
Which of the following best predicts the effect of not having ATP available to supply energy to this process (active transport)
Hydrogen ions will stop moving through the protein
Which statement best explains why correct protein folding is critical in the transmembrane proteins shown above
Into her actions of the Hydro phobic and hydrophilic amino acid's help to anchor the proteins in the membrane
Which of the following is true about the structure of the prokaryotic cell represented in the figure
It has a cell wall exterior to the plasma membrane and contains ribosomes
If instead of the bag the potatoes were placed in the beaker of distilled water which of the following would be true of the potato slice?
It would gain mass
Which of the following best supports the statement that mitochondria are descendants of Endo symbiotic bacteria like cells
Mitochondria and bacteria possess similar ribosomes and DNA
In a mesophyll cells of a leave the synthesis of ATP occurs in which of the following
Mitochondria and chloroplasts
A prokaryotic cell has which of the following
Plasma membrane
Prokaryotic and eukaryotic cells generally have which of the following features in common
Ribosomes
Of the two cells represented in the figure which would likely be more efficient at exchanging substances with the surrounding environment
Sell a because it has the larger surface area to volume ratio
Which of the following best represents the amount of starch water and glucose in the dialysis bag over the course of the investigation
Starch is constant, water increases, glucose decreases
Intravenous solutions administered to patients are normally isotonic which of the following is most likely if an IV of distilled water is administered to a patient
The cells that are exposed to hypotonic solutions will expand as water moves osmotically into the cells from the blood
A cells membrane potential is maintained by the movement of ions into and out of the cell based on the model presented in figure 1 which of the following outcomes will most likely result in a loss of protein X function?
The membrane potential will be disrupted by an increase in K+ concentration inside the cell
Which of the following scientific questions is most relevant to the model represented in the figure above
Which molecular substance is actively transported across the plasma membrane
an investigator wants to understand whether a newly found membrane protein is involved in membrane transport of a certain particle. which investigation will help determine whether the new membrane protein is a channel protein involved in membrane transport?
add more of the proteins to the plasma membrane and measure the rate of the particle movement.
a pathogenic bacterium has been engulfed by a phagocytic cell as part of the nonspecific (innate) immune response. Which of the following illustrations best represents the response?
phagocytic cell with bacterium and lysosome
the illustration above is a model of a typical beet root cell. based on the experimental results, which of the following best represents the effect of acetone on the permeability of cellular membranes?
the one with a small circle with dots in in (before) and then dots go to outside of the cell (after)
which of the following graphs is the most appropriate representation of the experimental data
the one with the bar graph and the error bars
Dialysis bag- from the initial conditions and results described, which of the following is a logical conclusion?
the pores in the bag are larger than the glucose molecules but smaller than the starch
the student analyze the data from the investigation and concluded that the estimate of the mean of the treatment group was unreliable. which of the following identifies the treatment group most likely to have provided an unreliable estimate of the mean, and correctly explains why the estimate appears unreliable?
treatment group 2- it has a lower than expected mean absorbance and the largest standard error of the mean
based on the data from the investigation, which of the following is the best scientific questions about organisms living in water that is polluted with organic solvents?
will organisms living in polluted environments exhibit detrimental effects from a increased permeability of their cellular membranes?
