What are two major differences between active transport and passive transport? Please give a specific example of each that occurs within a eukaryotic cell
What will be an ideal response?
Active transport moves molecules against their concentration gradient and thus requires energy, whereas passive transport requires movement with the concentration gradient and does not require energy. Oxygen moves through passive transport, whereas glucose can be moved through active transport.
You might also like to view...
Steroid hormones are large communication molecules that are modified cholesterol molecules. How do you think they enter a cell?
A) Their size probably allows them to diffuse through the plasma membrane. B) Their lipid nature probably allows them to diffuse through the plasma membrane. C) Their protein structure probably allows them to diffuse through the plasma membrane. D) They must require a protein transporter, because the plasma membrane is completely impermeable to molecules.
Anatomical traits are shaped by ____ constraints such as the requirement that a large body cannot evolve without evolution of a circulatory system to distribute material through it
a. evolutionary b. physiological c. chemical d. physical e. cellular
The several hundred species of picture-winged fruit flies of the Hawaiian Islands are genetically very similar, yet they all differ markedly from their ancestral population in Asia. This is probably an example of _____
A. gene flow. B. sexual selection. C. directional selection. D. founder effect. E. disruptive selection.
A mutation of a segmentation gene can result in
A. duplication of body parts. B. missing body regions. C. replacement of one body part with another. D. altered expression of homeotic genes. E. A segmentation gene mutation can cause all of these changes.