The movement of glucose into a cell against a concentration gradient is most likely to be accomplished by which of the following?

a) movement of glucose into the cell through a glucose channel
b) receptor-mediated endocytosis
c) cotransport of the glucose with a proton or sodium ion that was pumped across the membrane using the energy of atp hydrolysis
d) passive diffusion of the glucose through the lipid bilayer
e) facilitated diffusion of the glucose using a carrier protein

Efficiency is the percent of work put into a machine by the user (input work) that becomes work done by the machine (output work)

You have been asked to lead a demonstration for the undergraduate microbiology lab course about the uses of negative staining when studying bacteria. a "negative" stain does not stain the bacterial cell itself but stains the space between cells. under magnification, the acidic (negativelycharged) nature of the stain will be repelled by the negatively charged bacterial cell wall and willleave the cell colorless in a stained background. negative stains are used primarily to reveal the presence of negatively charged bacterial capsules; therefore, they are also called capsule stains. encapsulated cells appear to have a halo surrounding them. the negative stain procedure does not require heat fixation, which limits any chances of alteration in bacterial cell shape and size. the bacterial suspension is added to a drop of stain, such as nigrosin or eosin, and drawn across the glass slide using a coverslip.nigrosin staining-not safranin staining-of klebsiella pneumoniae will allow for the visualization of the cell shape and the determination of the presence of a capsule.true/false

How does friction with the atmosphere affect the speed of an artificial satellite