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Which type of biological molecule is most abundant in human cells? carbohydrate protein lipid nucleic acid Question 2 Which of the following functional groups is always present in any carbohydrate molecule? hydroxy! aldehyde ketone all of the above Which of the following molecules contains a chiral carbon? 0 CH2-CH2-CH2-CH2-CH3 3----3 3----3 T The Fischer projection structure of the monosaccharide psicose is shown below. Use it to answer the following questions: CH OH C=0 - -OH - CH OH A. Is psicose an aldose or a ketose? B. What other term describes psicose by its number of carbons? C. How many chiral carbons are in psicose? D. The OH at carbon number should be used to determine if psicose is in Lor D form. E. Is this the Lor D form of psicose? Which of the following is the other form of psicose (the entantiomer)? (for example: if you determined that the above structure is Lipsicose, which of these is D-psicose?). CH2014 1 NH 1 O-C H H H+ CHO CHOH 1