GATE Biomedical Engineering Practice Quiz

Question 1

A red blood cell is placed in a solution with much lower osmolarity than its cytosol. Which membrane transport event occurs first and is primarily responsible for the cell swelling?

Accepted Answer

Water enters the cell by osmosis through the membrane, mainly via aquaporins

Question 2

Which statement best distinguishes simple diffusion from facilitated diffusion across a cell membrane?

Accepted Answer

Facilitated diffusion can show saturation kinetics, whereas simple diffusion generally does not

Question 3

If extracellular K+ concentration is increased substantially while membrane permeability remains dominated by K+, the membrane potential will most likely:

Accepted Answer

Become less negative because the outward K+ gradient is reduced

Question 4

A researcher blocks ATP production in a cell but keeps membrane channels and carriers structurally intact for a short time. Which transport process will continue initially despite ATP depletion?

Accepted Answer

Glucose uptake through a GLUT transporter down its gradient

Question 5

A membrane transporter uses the inward Na+ gradient to move glucose into an epithelial cell even when intracellular glucose concentration is already high. This is an example of:

Accepted Answer

Secondary active transport

GATE Biomedical Engineering

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