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?