9. Which of the following statement is correct?  
A. Glucose is a water-soluble material that needs channel protein to pass across the cell membrane. 
B. Lipid is a water-soluble material that needs channel protein to pass across the cell membrane. 
C. Ions are water soluble materials that needs channel protein to pass across the    cell membrane. 
D. All statements are correct. 
10. Some peripheral protein play critical role in the response of the external stimuli.  
Peripheral protein like glycoprotein changes its shape once it receives signal.  
A. Both statements are correct. C. 1st statement is correct; 2nd statement is incorrect. 
B. Both statements are incorrect. D. 1st statement is incorrect; 2nd statement is correct. 

multiple choice pick the letter of correct