I am a 27 year old aspiring doctor. I have been involved in STEM since I was accepted into the SSTRIDE program(which is a program for aspiring physicians) when I was in the 6th grade. I continued in the program up until I graduated from college and I also served as one of the SSTRIDE STEM mentors and TA for SSTRIDE STEM students in 5th-12th grades during my college years. As I pursued my masters degree in medical science, I realized how beneficial video learning was in conjunction with normal lectures and I found myself excelling in the program because of it. I now want to give back and pursue a job in video learning as I continue my journey in becoming a medical doctor, helping those along the way who may have the same aspirations a me.
Which of the following statements are correct? Explain youranswers.A. The plasma membrane is highly impermeable to all charged molecules.B. Channels have specific binding pockets for the solute molecules they allow to pass.C. Transporters allow solutes to cross a membrane at much faster rates than do channels.D. Certain $\mathrm{H}^{+}$ pumps are fueled by light energy.E. The plasma membrane of many animal cells contains open $\mathrm{K}^{+}$ channels, yet the $\mathrm{K}^{+}$ concentration in the cytosol is much higher than outside the cell.F. A symport would function as an antiport if its orientation in the membrane were reversed (i.e., if the portion of the molecule normally exposed to the cytosol faced the outside of the cell instead).G. The membrane potential of an axon temporarily becomes more negative when an action potential excites it.
Both maltose and lactose are reducing sugars, but sucrose is a nonreducing sugar. Explain why.
