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- Q1
The cell membrane is made mostly of
carbohydrates
protein
phospholipids
two layers of phospholipids with proteins in it
30sB.C.1 - Q2
How do large and/or polar molecules pass through the plasma (cell) membrane?
protein channels
diffusion
carbohydrates
osmosis
30sB.C.1 - Q3
Carbohydrates in the cell membrane provide the main source of energy for the cell
falsetrueTrue or False30sB.C.1 - Q4
the cell membrane is made solely of carbohydrates which gives the cell strength and structure
falsetrueTrue or False30sB.C.1 - Q5
The two layers of phospholipids allow small non-polar molecules to pass freely through the membrane
truefalseTrue or False30sB.C.1 - Q6
The two layers of phospholipids make it difficult for large, hydrophilic substances to pass freely through the membrane
truefalseTrue or False30sB.C.1 - Q7
the membrane is made solely of proteins, this allows the cell to carry out all necessary reactions under unfavorable conditions
falsetrueTrue or False30sB.C.1 - Q8
Sucrose is a type of sugar (carbohydrate). Sucrose is dissolved in water so it is the solvent. The sucrose molecule is too large to pass through the membrane. Why does one cell get larger, one cell gets smaller, and one cell stays the same?
Water moves into the cell and solutes move out of the cell to ensure their concentration is balanced both inside and outside the cell.
Water transports solutes out of the cell to balance the percent concentration of solutes both inside and outside the cell.
Water moves freely both inside and outside the cell independent of the solute concentration.
Water movement into the cell is dependent on the percent concentration of solutes both inside and outside the cell.
120sB.C.1 - Q9
What mechanism causes sodium and potassium ions to move through the sodium-potassium pump?
Osmosis powers the pump, moving each ion from a region of greater concentration to a region of less concentration
ATP provides the energy to move the ions against the ion gradient
The cell becomes hypotonic. This creates greater pressure inside the cell and pushes the ions through the sodium-potassium pump
Flow of ions through the sodium and potassium channels create a circular current. This moves sodium and potassium ions through the pump.
120sB.C.1 - Q10
The concentration of solutes inside and outside of cells impacts the cells’ structure and ability to function. If a saltwater plant cell is placed in a solution that contains a low concentration of solute, how would the cell’s structure be impacted?
The cell membrane would shrink away from the cell wall because the water would leave the vacuole by osmosis
The vacuole would be completely full because of osmosis and the cell would push against the cell wall
The cell wall and the cell membrane would both shrink because the water would leave the vacuole and leave the cell by osmosis
The cell would stay the same, the vacuole would not be completely full and it would not shrink
60sB.C.1 - Q11
The concentration of solutes inside and outside of cells impacts the cells’ structure and ability to function. If a freshwater plant cell is placed in a solution that contains a high concentration of solute, how would the cell’s structure be impacted?
The cell wall and the cell membrane will both shrink as the vacuole empties and the water leaves the cell by osmosis
The vacuole will be completely full and the cell membrane will push against the cell wall
The cell will stay the same
The cell wall will stay mostly the same but the cell membrane will pull away from the cell wall as the water leaves the cell by osmosis
60sB.C.1 - Q12
Organic molecules are composed mainly of carbon.
truefalseTrue or False30sB.C.1 - Q13
Water is an example of an essential cellular organic molecule
falsetrueTrue or False30sB.C.1 - Q14
Organic molecules can be in the form of long chains and rings
truefalseTrue or False30sB.C.1 - Q15
Most organic molecules are able to diffuse through the cell membrane
falsetrueTrue or False30sB.C.1
