Vitamin D O Vitamin A Question 5 Which statementí\'s) describes an amino acid in
ID: 694201 • Letter: V
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Vitamin D O Vitamin A Question 5 Which statementí's) describes an amino acid in a solution with a pHt higher than its pl vakue? (Select all that are true) The solution is more basic than the pl value 0 The solution is more acidic than the ve The amine will exist as NH3 and the carboxylic acid willexist as COOH The amine will exist as NH2 and the carboxylic acid will exist as Coo Question 6 Which of the following modes of transport requires energy input? Active transport OFacilitated transport O Difussion Dialysis Question 7 Which of the following statements is true about tlacylglycerols? (Select al that apply) They contain ester bonds They contain amide bonds The three fatty acids have to all be the same They contain glycerol Save and Submit Click Save and Submit to save and submit. Click Save All Anstcers to sa e ar anscers.Explanation / Answer
Ans 5) Lets start with the defination: We know Pl value is the pH where the amino acid molecule contains net neutral charge and there exists the zwitterions(both positive and negative charge with net 0 charge)
This means moving away from pl point is moving from positive to ngative charged form of amino acid molecule.
At low pH Amino acid molecule will be Positively charged(keeping aside the 'R' functional group)
At High pH Amino acid molecule will be Negatively charged(keeping aside the 'R' functional group)
Thus the pH higher than the Pl value means the solution will be Basic and the amine will exists as NH2 and carboxylic acid will exists as COO-
Ans 6)
Active Transport uses energy to move solutes against their gradients and requires ATP as energy.
Transport Proteins speed the passive movement of molecules across the plasma membrane and hence not entitled for energy input.
Diffusion occurs due to concentration gradient.
Dialysis is separation of suspended colloidal particles from dissolved ions/molecules through the pores of semipermeable membranes.
Ans 7) A triglyceride/ triacylglycerol is itself an ester derived from glycerol and three fatty acids(are usually different).
Those containing the same kind of fatty acid in all three positions are called simple triacylglycerols. They do not contain amide bonds.
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