09/27/19
At rest, the interior of a neuron is negatively charged relative to the exterior. The negative charge is due mainly to..?
sodium ions
chloride ions
potassium ions
proteins
I was thinking the answer is "2," but I am not positive.
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09/25/19
Choose all of the statements that apply to a plasma membrane (aka cell membrane)
Which one's are correct?
is a 2-D fluid
contains cholesterol and proteins
contains a lipid bilayer of phospholipids
water cannot diffuse freely across the membrane
charged molecules cannot enter or...
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09/25/19
Membrane lipids are capable of many different types of movement. Which of these does NOT occur spontaneously in biological membranes?
switching between lipid layers
lateral movement
rotation
flexing of hydrocarbon
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09/03/19
How is the idea of evolution related to diversity? How does sexual reproduction play a role in this process?
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08/25/19
plants pollination
How modifications in flower structure make pollination more successful?
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