AP Bio test

the illustration shows active transport of hydrogen ions through a membrane protein. Which of the following best predicts the effect of not having ATP available to supply energy to this process?

A: H+ ions will stop moving through the protein

In an experiment, the efficiency of oxygen exchange across the plasma membrane is being assessed in four artificial red blood cells. The table above lists some properties of those artificial cells. Other conditions being equal, which artificial cell is predicted to be the most efficient in exchanging oxygen with the environment by diffusion?

A: The cuboidal cell

carbon dioxide most likely enters the cell through which of the following processes

A: simple diffusion

A scientist designed an experiment to test an artificial membrane that mimics the phospholipid bilayer of a cell.The scientist built a tube that was divided by an artificial membrane and filled with distilled water. The scientist put a known amount of a protein into the water on one side of the membrane. After some time, the scientist measured the concentration of the protein on either side of the membrane but found that there had been no change.Which of the following experimental changes would allow the scientist to observe transport of a solute across the artificial membrane?

B: Use a small, nonpolar solute instead of a protein

which of the following components of the cell membrane is responsible for active transport

B: protein

Which statement best describes the effect on water transport across the cell membrane if the aquaporin in the figure ceases to function?

B:Water molecules will still be able to move across the cell membrane but at a slower rate.

Which of the following scientific questions is most relevant to the model represented in the figure above?

C: Which molecular substance is actively transported across the plasma membrane?

Figure 1 shows a model of how a channel protein influences the movement of a particle across a cell's plasma membrane. Figure 1. A section of a cell's plasma membrane, showing a channel protein and a concentration gradient across the 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?

C: add more of the proteins to the plasma membrane and measure the rate of the particle movement

If ATP breakdown (hydrolysis) is inhibited, which of the following types of movement across cell membranes is also inhibited?

C: passage of a solute against the concentration gradient

The diagram above represents a typical rod shaped bacterium. Which of the following best describes a feature shown in the diagram that is unique to archaea and bacteria?

C:The organism does not have a nuclear membrane surrounding its genetic material.

The manner in which several different ions and molecules move through a cell membrane is shown in the diagram above. For each ion or molecule, the relative concentration on each side of the membrane is indicated. Which of the following accurately describes one of the movements taking place?

D: Na+ is transported out of the cell and requires ATP hydrolysis

Aquaporins are channel proteins that facilitate the transport of water across the cell membrane. One group of researchers hypothesizes that without functional aquaporins, no water will be able to enter the cell. A different group proposes an alternative hypothesis, stating that even with nonfunctional aquaporins, a small amount of water will still cross the cell membrane. An experiment is set up in which plant cells with mutated (nonfunctional) aquaporins and plant cells with normally functioning aquaporins are both placed in distilled water.Which of the following data would support the alternative hypothesis?

D:Cells with mutated aquaporins exhibit moderate turgor pressure and are hypertonic

The contents of which dialysis tube are initially isotonic to the distilled water in the beaker?

E: 5

A net movement of water into the beaker occurs in which of the following dialysis tubes

E:6

Researchers claimed that a particular organelle originated from a free-living prokaryotic cell that was engulfed by a larger cell, as shown in Figure 1. Which of the following provides evidence to best support the researchers' claim?

c: double membrane

What evolutionary advantage does compartmentalization of core metabolic processes offer eukaryotes?

evolution of a nucleus in eukaryotes separates the processes of transcription and translation and they can be regulated separately