Academic assignment (week 7) YF PDF

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week 7 chem...

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Academic Assignment (week 7) Student’s Name:

1) A carbohydrate that gives two molecules when it is completely hydrolyzed is known as a . 2) Which group of carbohydrates cannot be hydrolyzed to give simpler carbohydrates? . 3) All monosaccharides contain the functional groups

and

. 4) A monosaccharide that contains 6 carbon atoms, one of which is in an aldehyde group, is classified as a(n)

.

5) A monosaccharide that contains 4 carbon atoms, one of which is in an aldehyde group, is classified as a(n)

.

6) Classify each of the following monosaccharides as an aldopentose, ketopentose, aldohexose, or ketohexose: a.

b.

7) In photosynthesis, reactants are and energy is

,

, products are

,

.

8) In respiration, reactants are and energy is

, products are

.

9) Achiral compounds are those which . A) are identical B) have different mirror images C) are nonsuperimposable D) have the same formula but different structures E) have a carbon attached to four different atoms

1

10) Stereoisomers that are nonsuperimposable mirror images of each other are known as . 11) Which of the following objects is chiral? Assume that each object has no markings or printings. A) a pencil

B) a baseball bat

C) a glove

D) a hockey puck

E) a drinking glass

12) How many different substituents are required on a carbon atom for it to be chiral? 13) For each of the following, indicate whether the carbon in red is chiral or achiral. a .

b.

c .

14) Determine if each Fischer projection is chiral or achiral. If chiral, identify it as the D or L stereoisomer. a .

b.

c .

15) The sugar also known as dextrose and blood sugar is named

.

16) Hypoglycemia is a condition in which the glucose level in the blood is normal.

than

17) Identify the class of protein according to their functions in each of the following. A)

provide structural components

B)

stores the genetic information

C)

movement of muscles

D)

catalyze reactions in the cells

E)

transport substances through the bloodstream

18) Any amino acid contains the functional groups 2

and

.

19) The structural formulas of amino acids are the same except for the

group.

20) In the ionized form of an amino acid, the ammonium end is charged

.

21) Classify the following amino acid side chain as polar or nonpolar.

– CH2 – CH – C | 22) Classify each of the following amino acids as nonpolar or polar. If polar, indicate if the R group is neutral, acidic, or basic. Indicate if each would be hydrophobic or hydrophilic. A. B. Classifications Amino acid Amino acid B A Nonpolar or polar Neutral, acidic, or basic Hydrophobic or hydrophilic 23) Identify foods that contain all the essential amino acids in their composition. A)

eggs

B)

milk

C)

beans

D)

steak

E)

ham

24) Amino acids that are not synthesized in the body and must be obtained from the diet are in total and called

.

25) A chain made of more than 50 amino acids that has biological activity is referred to as a(n) . 26) Compared to an uncatalyzed reaction, an enzyme-catalyzed reaction . A) uses less substrate B) produces different products C) occurs at a faster rate D) requires more energy E) requires a higher temperature 27) The presence of enzymes to catalyze bioreactions in our bodies allows A) us to eat non-nutritious substances without consequence B) the activation energy of a reaction to be raised C) the rate of a desired chemical reaction to slow down D) bioreactions to occur under extreme conditions of temperature and pH E) bioreactions to take place under mild conditions 28) Factors affecting enzyme activity are

,

3

, and

.

29) Mention the denaturing agents of proteins.

4...