Chemistry paper 3 urgent

[fk95]

I really need help in M/J 05 Q5 for the following questions:

(iv) The synthetic polymer, nylon, has the same linkage as proteins. Draw the structural
formula of nylon.

(b) Enzymes called carbohydrases can hydrolyse complex carbohydrates to simple sugars
which can be represented as HO-(rectangle)-OH. Draw the structure of a complex
carbohydrate.

Heres the link to the paper if you need it: http://www.xtremepapers.net/CIE/Cambrid ... 5_qp_3.pdf

 

[XPFMember]

(iv) The synthetic polymer, nylon, has the same linkage as proteins. Draw the structural
formula of nylon.

__(__CO__[rectangle]__CO__NH__[RECTANGLE]__NH__)n__

(b) Enzymes called carbohydrases can hydrolyse complex carbohydrates to simple sugars
which can be represented as HO-(rectangle)-OH. Draw the structure of a complex
carbohydrate.

__(__[rectangle]__O__[rectangle]__)n__

 

[fk95]

(iv) The synthetic polymer, nylon, has the same linkage as proteins. Draw the structural
formula of nylon.

__(__CO__[rectangle]__CO__NH__[RECTANGLE]__NH__)n__

(b) Enzymes called carbohydrases can hydrolyse complex carbohydrates to simple sugars
which can be represented as HO-(rectangle)-OH. Draw the structure of a complex
carbohydrate.

__(__[rectangle]__O__[rectangle]__)n__

thanks alot.
but what does the rectangle symbolize?

 

[arabiannight975]

the whole formula of the compund under reaction!!

but becuz we have to show the linkage only so they make a RECTANGLe and show the linkage only!