Exam II93 cards

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1

What is the function of DNA phosphatase?

Removes the 5' phosphate to prevent self ligation of vectors for cloning DNA









10

_____are storage molecules

Starch Glycogen Both a and b







17

Cerebrosides are..

glycophingolipids with one sugar





22

Polyunsaturated fatty acids contain

more than one double bond in the hydrocarbon chain









31

Monosaccharides

are simple sugars cant be broken down into simpler sugars

32

What is a lectin?

proteins that bind sugars



35

Which processes depend on information transfer modulated by glycoconjugates?

Cell migration immune response blood clotting cell-cell interaction all of the above

36

Gangliosides contain...

3 or more sugars





41

A major constituent of cell membranes is the following:

Phosphatidic acid Phospahtodycholine


43

Gangliosides have a type of ____ and are important in ____ and ____

Glycosidic linkage: neurodevelopment: nerve ending

44

Waxes_____

are esters have the general formula R1COOR2

45

Rank the following in increasing order

Isoprene Glucose Menthol(monoterpene) Sucrose Stearic Acid retinal(diterpene)

46

All are characteristis of membranes EXCEPT:

does not allow any penetration through





51

Blah

Blah








59

Which of these statements about the composition of membranes is true?

The inner and outer membranes of mitochondria have different protein compositions

60

All of the following are true about D and L stereochemistry of carbohydrates EXCEPT:

D,L speficices the sign of rotation of plante polarized light




64

Lectins, selectins, and antibodies

interact with specific carbohydrates



67

Which of the following is true about lipids?

more are simple polymers of isoprene produced by plants




71

How many rings structrues are in the "core structure" of a steroid?

three 6-membered rings and one 5-membered ring