BIOCHEMISTRY 3613

Exam 1 ‑September 13, 2002

 

 

Row number:                                                          Name:                                                                    

 

Multiple choice ( 3 points each):

1.             Which of the following types of bonding is the strongest?

                (a) covalent

                (b) ionic interaction or salt like

                (c) hydrogen bonding

                (d) dipole‑dipole interaction

 

2.             Which of the following types of bonding is the weakest?

                (a) covalent

                (b) ionic interaction or salt like

                (c) hydrogen bonding

                (d) dipole‑dipole interaction

 

3.             Water molecules are attracted to each other by what type bonding?

                (a) covalent

                (b) ionic interaction or salt like

                (c) hydrogen bonding

                (d) dipole‑dipole interaction

 

4.             Which of the following carbohydrates is considered a ketose?

                (a) glucose

                (b) fructose

                (c) mannose

                (d) galactose

 

5.             Which of the following is an example of a pentose?

                (a) glyceraldehyde

                (b) erythrose

                (c) ribulose

                (d) ribose

 

6.             If glucose has 4 asymmetric carbon atoms, how many optical isomers of glucose are possible?

                (a) 2

                (b) 4

                (c) 8

                (d) 16

 

 

7.              D‑glucose and L‑glucose are mirror images of each other and thus are examples of:

                (a) diastereoisomers

                (b) enantiomers

                (c) anomers

                (d) geometric isomers

 

8.              "‑Glucose and $‑glucose are examples of what type of isomers?

                (a) diastereoisomers

                (b) enantiomers

                (c) anomers

                (d) geometric isomers

 

9.             Which of the following types of isomers of glucose cannot be determined by inspection and must be determined by a polarimeter?

                (a) d and 1

                (b) D and L

                (c) " and $

                (d) cis and trans

 

10.           Sucrose or common table sugar contains:

                (a) glucose and glucose

                (b) glucose and galactose

                (c) glucose and fructose

                (d) galactose and fructose

 

11.           Maltose or malt sugar contains:

                (a) glucose and glucose

                (b) glucose and galactose

                (c) glucose and fructose

                (d) galactose and fructose

 

12.           Lactose or milk sugar contains:               

                (a) glucose and glucose

                (b) glucose and galactose

                (c) glucose and fructose

                (d) galactose and fructose

 

13.           Which of the following is not a reducing sugar?

                (a) sucrose

                (b) maltose

                (c) lactose

                (d) they all are reducing sugars

 

 

14.           What type of linkage(s) is/are between the glucose units in cellulose?

                (a) "‑1,4

                (b) $‑1,4

                (c) "‑1,4 and "‑l,6

                (d) $‑l,4 and $‑l,6

 

15.           What type of linkage(s) is/are between the glucose units in amylose?

                (a) "‑1,4

                (b) $‑1,4

                (c) "‑1,4 and "‑l,6

                (d) $‑l,4 and $‑l,6

               

16.           What type of linkage(s) is/are between the glucose units in amylopectin?

                (a) "-1,4

                (b) $‑l,4

                (c) "‑l,4 and "‑l,6

                (d) $‑l,4 and $‑l,6

 

17.           What type of linkage(s) is/are between the glucose units in glycogen?

                (a) "-1,4

                (b) $‑l,4

                (c) "‑l,4 and "‑l,6

                (d) $‑l,4 and $‑l,6

 

18.             Chondroitin sulfates are heteropolysaccharides that contain polymers of:

                (a) D‑glucruonic acid and N‑acetyl glucosamine

                (b) D‑glucuronic acid and N‑acetyl galactosamine sulfate

                (c) D‑glucuronic acid sulfate and glucosamine‑N‑sulfate

                (d) D‑glucuronic acid sulfate and galactosamine‑N‑sulfate

 

19.           In general, fatty acids that are liquid at room temperature contain‑carbons or less?

                (a) 6

                (b) 8

                (c) 10

                (d) 12

 

20.           Which of the following fatty acids does not contain a double bond?

                (a) oleic acid

                (b) linoleic acid

                (c) stearic acid

                (d) arachidonic acid

 


21.           In general, naturally occurring unsaturated fatty acids are

                (a) in the cis configuration

                (b) in the trans configuration

                (c) an equal mixture of cis and trans configurations

 

22.           Which of the following is an example of a neutral lipid?

                (a) triacylglycerol

                (b) lecithin

                (c) cephalin

                (d) plasmalogin

 

23.           A lecithin contains:

                (a) glycerol, fatty acids

                (b) glycerol, fatty acids, phosphate

                (c) glycerol, fatty acids, phosphate, ethanolamine

                (d) glycerol, fatty acids, phosphate, choline

 

24.           A cephalin contains:

                (a) glycerol, fatty acids

                (b) glycerol, fatty acids, phosphate

                (c) glycerol, fatty acids, phosphate, ethanolamine

                (d) glycerol, fatty acids, phosphate, choline

 

25.           A plasmalogin contains:

                (a) glycerol

                (b) glycerol, fatty acids

                (c) glycerol, fatty acids, phosphate, serine

                (d) glycerol, an ", $‑unsaturated ether, serine

 

26.           A ceramide contains:

                (a) sphingosine

                (b) sphingosine, N‑fatty acid

                (c) sphingosine, N‑fatty acid, phosphate, choline

                (d) sphingosine, N‑fatty acid, hexose

 

27.           A sphingomyelin contains:

                (a) sphingosine

                (b) sphingosine, N‑fatty acid

                (c) sphingosine, N‑fatty acid, phosphate, choline

                (d) sphingosine, N‑fatty acid, hexose

 

 

28.           A cerebroside contains:

                (a) sphingosine

                (b) sphingosine, N‑fatty acid

                (c) sphingosine, N‑fatty acid, phosphate, choline

                (d) sphingosine, N‑fatty acid, hexose

 

29.           Which of the following is not an example of a terpene?

                (a) bees wax

                (b) phytol

                (c) squalene

                (d) $‑caratene

 

30.           Which of the following vitamins is not classified as a terpene?

                (a) vitamin A

                (b) vitamin D

                (c) vitamin E

                (d) vitamin K

 

31.            Cholesterol is classified as a lipid because

                (a) it contains glycerol

                (b) it contains isoprene units

                (c) it is a sterol

                (d) it contains fatty acids

 

32.           A cell membrane may contain:

                (a) phospholipids

                (b) proteins

                (c) carbohydrates

                (d) all of the above

 

33.           Various chemicals can cross membranes by

                (a) passing through specific protein ionophores

                (b) binding to specific protein transporters

                (c) active transport

                (d) all of the above