Biology Transport in Plants ( Not In Syllabus ) Phloem Transport: Flow from Source to Sink Single Correct MCQ
Published on: August 13, 2026

Some cells are placed in a solution of glucose to measure the rate of diffusion. As the concentration of

glucose solution is being increased, the diffusion rate increases simultaneously. However, when the concentration of glucose solution reaches above 10 m, the diffusion rate no longer increases Which statement best defines the mechanism of glucose transport in the cells?

A
Transport of hydrophilic substances along the concentration gradient through fixed membrane transport protein without the involvement of energy expenditure
B
Transport of hydrophilic substances along and against the concentration gradient via carrier proteins
C
Active transport via transporter proteins
D
Facilitated diffusion without carrier proteins

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