38 ) Which of the following molecules will diffuse most quickly across a membran

Question

38 ) Which of the following molecules will diffuse most quickly across a membrane? A. glucose B. K+ ?.Os D. large proteins E. CI- 39) Which of the following is a characteristic feature of a carrier protein in a plasma membrane? A. It is a peripheral membrane protein. B. It changes shape to move solutes across the membrane. C. It requires the expenditure of cellular energy to function. D. It works against diffusion. E. It has few, if any, hydrophobic amino acids. solutes in the 40) If the concentration of solutes in a cell is more than the concentration of surrounding fluid, then the extracellular fluid is said to be A hypertonic B. hypotonic C. isotonic D. stable E. amphipathic

Explanation / Answer

Ans1:-oxygen is the molecule which will diffuse most quickly across the phospholipid bilayer membrane.

#reason:-oxygen is a small molecule and it's non polar ,so it's easily passes through a cell membrane.

Ans 2:-The characteristic feature of carrier protein in plasma membrane is ,it changes shape to move solutes across the membrane.

#reason:- it exhibit specifications for a particular type of molecule.

Ans3:- if the concentration of the solutes in the cell is more than the concentration outside of the cell ,then the extra cellular fluid is said to be hypo tonic solution of the cell.

#reason:-in a hypo tonic solution the total molar concentration of all dissolved solute particles is less than that of another solution or less than that of a cell.

Related Questions

Navigate

• Browse (All)
• Browse 3
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.