1.
QUESTION 2 0.5 points Save Answer
DAMNSAIDTHEFISHTHATHITTHEWALLRADICALLYHARD The above peptide was
submitted for exhaustive acid hydrolysis. 735 pmols of threonine was recovered. How many
pmols of D was would be found in the treated sample? Assume 100% recovery. 0 147 pmols o
588 pmols o 919 pmols 0 7 8 9 and was arrested for number cannibalism! o 735 pmols o 184
pmols QUESTION 3 Which statement is true about passive transport of a molecule through a
membrane. It is endergonic. It does not require the assistance of a transporter. o Does not require
favorable energy conditions to pass through the membrane 0.5 points Save Answer it directly
forms a gradient. None of the answers are true.
Solution
The peptide that had undegone acid hydroysis is
DAMNSAIDTHEFISHTHATHITTHEWALLRADICALLYHARD and there was 100%
recovery of all amino aicds.
Given that 735 pmols of threonine amino acid were obtained, in the above peptide there were 5
T(threonine) amino acid
The amount of D amino acids = ? there are 4 D aminoacids in the above peptide
5 T ------ 735 pmols
4 D ------? 735 x 4/5 = 588 pmols of D amino acids
2) Passive transport of a molecule through a membrane does not require favorable energy
conditions to pass through the membrane.
They are 4 main types of passive transport are simple diffusion, facilitated diffusion, filtration
and/or osmosis.
Either of the 4 trasnports do not require energy for transportation of molecules through a
membrane. They movement will be based on concentration gradient.