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Biochem Prelims

Total questions: 137

Worksheet time: 1hrs 9mins

Name
Class
Date
1.

Substance that yield such compounds on hydrolysis

a)

Proteins

b)

Carbohydrates

c)

Lipids

d)

Enzymes

2.

Major source of food

a)

Carbohydrates

b)

Lipids

c)

Fats

d)

Proteins

3.

Single polyhydroxy aldehyde or ketone

a)

Disacharides

b)

Monosacharides

c)

Monosaccharides

d)

Disaccharides

4.

Prefix of Aldehydes

a)

aldo-

b)

aldose-

c)

Aldo-

d)

Aldose-

5.

These structures in solution are in equilibrium with the corresponding open-chain structures

a)

Polysaccharides

b)

Oligosaccrides

c)

Monosaccharides

d)

Disaccharides

6.

Reducing sugars

a)

Glucose

b)

Lactose

c)

Sucrose

d)

Trehalose

7.

Relative sweetness of Galactose

a)

0.16

b)

0.73

c)

0.32

d)

0.22

8.

Relative Sweetness of Invert Sugar

a)

0.16

b)

1.40

c)

1.00

d)

1.30

9.

Sugar backbone of RNA

a)

B-D-ribose

b)

A-D-ribose

c)

C-D-ribose

d)

A-D-Ribose

10.

Formed during hydrolysis of starch

a)

Starch

b)

Lactose

c)

Maltose

d)

Sucrose

11.

Known as levulose

a)

B-D-galactose

b)

A-D-galactose

c)

A-D-fructose

d)

B-D-fructose

12.

73% sweeter than sucrose

a)

Fructose

b)

Raffinose

c)

Maltose

d)

Galactose

13.

Carbohydrate compound ratio

a)

1:2:1

b)

2:1:1

c)

2:1:2

d)

1:1:2

14.

Found in peas and beans: largely undigested

a)

Maltose

b)

Trehalose

c)

Raffinose

d)

Gentianose

15.

Main storage of carbohydrate in plants

a)

Cellulose

b)

Glucose

c)

Starch

d)

Glycogen

16.

Polymers of glucose

a)

Maltose

b)

Starch

c)

Cellulose

d)

Glycogen

17.

Polymer of a-glucose that contains amylose and amylopectin

a)

Starch

b)

Glycogen

c)

Maltose

d)

Cellulose

18.

3-10 monosaccharides

a)

Oligosaccharides

b)

Polysaccharides

c)

Monosaccharides

d)

Disaccharides

19.

B-glucose monomers are linked by 1,4 glycosidic bonds

a)

Starch

b)

Cellulose

c)

Glycogen

d)

Raffinose

20.

Said to be optically active

a)

Chiral molecules

b)

Achiral molecules

c)

Achiral

d)

Chiral

21.

Rotates polarized light to right

a)

Dextrorotatory (-)

b)

Dextrorotatory (+)

c)

Levotatory (-)

d)

Levorotatory (+)

22.

Responsible for determining blood type

a)

Polysaccharides

b)

Fructooligosaccharides

c)

Oligosaccharides

d)

Disaccharides

23.

Component of glycoproteins or glycolipids

a)

Dissaccharides

b)

Oligosaccharides

c)

Polysaccharides

d)

Monosaccharides

24.

Greek word 'kheir' means

a)

Hand

b)

Finger

c)

Shape

d)

Palm

25.

Any carbon atom which is connected to 4 same groups

a)

Chirality

b)

Chiral

c)

Achirality

d)

Achiral

26.

Has same chemical formula with different structures

a)

Stereocenter

b)

Stereoisomers

c)

Stereosomers

d)

Stereochemistry

27.

Maximum number of possible stereoisomers

a)

1

b)

2

c)

3

d)

4

28.

Property of asymmetry

a)

Achiral molecule

b)

Chiral molecule

c)

Chirality

d)

Achirality

29.

Rotates polarized light to left

a)

Lavorotatory (+)

b)

Levorotatory (-)

c)

Dextrarotatory (-)

d)

Dextrorotatory (+)

30.

Convenient way to represent mirror images

a)

Haworth

b)

Fisher

c)

Chirality

d)

Achirality

31.

Hydroxy group points at the left

a)

L-isomers

b)

L-Isomers

c)

L-isomer

d)

L-Isomer

32.

Hydroxy group points at the right

a)

D-Isomer

b)

D-isomer

c)

D-isomers

d)

D-Isomers

33.

Common source of energy (dextrose)

a)

D-glucose

b)

L-glucose

c)

D-Glucose

d)

L-Glucose

34.

Simplest carbohydrates that exist in 2 isomeric forms that has a mirror image

a)

Glucose

b)

Glyceraldehyde

c)

Glycogen

d)

Fructose

35.

Composed of 3 fatty acids + glycerol

a)

Fatty acids

b)

Phospholipids

c)

Triglycerides

d)

Fatty acids & Tryglycerides

36.

Used as laxative

a)

D-glucose

b)

B-glucose

c)

L-glucose

d)

A-glucose

37.

Organic acid that has an acid and methyl group

a)

Triglycerides

b)

Fatty acids

c)

Omega-6

d)

Omega-3

38.

Hydrophobic biomolecule

a)

Lipids

b)

Proteins

c)

Carbohydrates

d)

Enzymes

39.

What % of dry plant material is produce by photosynthesis?

a)

70

b)

50

c)

75

d)

55

40.

Hydrogen exist in the same side

a)

cis

b)

sis

c)

frans

d)

trans

41.

Triglyceride containing 3 saturated fatty acids

a)

Saturated fat

b)

Monosaturated

c)

Monounsaturated

d)

Unsaturated fat

42.

Consist of 2 monosaccharides units

a)

Disaccharides

b)

Monosaccharides

c)

Disacharides

d)

Monosacharides

43.

Carbon chains that lack some hydrogens

a)

Saturated

b)

Unsaturated

c)

Monosaturated

d)

Monounsaturated

44.

Addition of hydrogen to unsaturated fat

a)

Hydrogenisis

b)

Hydrolysis

c)

Hydrogenated

d)

Hydrogenator

45.

Similar to triglycerides

a)

Fatty acids

b)

Phospolipids

c)

Phospholipids

d)

Fats

46.

Fold back to U-like formation

a)

Sis

b)

Cis

c)

Frans

d)

Trans

47.

Initiates lipids digestion by hydrolyzing one bond of triglyceride

a)

Acid lipase

b)

Acid-stable lipase

c)

Acid-stable lingual lipase

d)

Lingual lipase

48.

Consists of carbon rings

a)

Sterol

b)

Sterols

c)

Stereo

d)

Stereos

49.

Gastric lipase

a)

Mouth

b)

Stomach

c)

Small intestine

d)

Large intestine

50.

Contains CHON

a)

Carbohydrates

b)

Lipids

c)

Enzymes

d)

Proteins

51.

Cluster of lipids and proteins

a)

Phospholipids

b)

Triglycerides

c)

Lipoprotein

d)

Amino acid

52.

Contain other organic or inorganic components

a)

Simple

b)

Globular

c)

Fibrous

d)

Conjugated

53.

How many are there in naturally-occuring amino acids

a)

10

b)

20

c)

30

d)

100

54.

Amino acid is attached to the first carbon

a)

Alpha

b)

Beta

c)

Delta

d)

Omega

55.

More spherical that transport proteins

a)

Globular

b)

Fibrous

c)

Simple

d)

Conjugated

56.

Short chains of amino acids

a)

Peptide

b)

Protein

c)

Polypeptide

d)

Enzymes

57.

Protein function for muscle activity

a)

Movement

b)

Activity

c)

Myosin & Actin

d)

Structural

58.

Linear sequence of side chains

a)

Secondary

b)

Tertiary

c)

Primary

d)

Quaternary

59.

Causes protein chain to fold and align to produce orderly patterns

a)

Glycosidic bonding

b)

Hydrogen bonding

c)

Covalent bonding

d)

Glysidic bonding

60.

From between 2 cysteine that are close to each other

a)

Disulfide bond

b)

Disulfide bridges

c)

Salt bridges

d)

Salt bond

61.

Highly branched, similar to amylopectin

a)

Glucose

b)

Starch

c)

Cellulose

d)

Glycogen

62.

Less common than a-helix that is only found in protein silk

a)

A-pleated sheet

b)

B-pleated sheet

c)

A-helix

d)

B-helix

63.

Bending and folding into a 3D shape

a)

Primary

b)

Secondary

c)

Tertiary

d)

Quaternary

64.

Often treated with large doses of raw egg white and milk

a)

Amides

b)

Light-metal poisoning

c)

Heat poisoning

d)

Heavy-metal poisoning

65.

Nonprotein molecule which carries chemical reaction that cannot be performed by standard amino acids

a)

Binding site

b)

Organic

c)

Co-factor

d)

Inorganic

66.

Comparison of free energy activation

a)

Catalyst

b)

Catalystic Efficiency

c)

Catalytic Sufficiency

d)

Catalytic Efficiency

67.

Biological catalysts

a)

Protein

b)

Enzymes

c)

Amino acids

d)

Isomer

68.

Lowering the pH causes zwitterion to

a)

Lose proton

b)

Pick proton

c)

Lose electron

d)

Pick electron

69.

Special pocket/cleft

a)

Active site

b)

Co-factors

c)

Substrate

d)

Products

70.

Nonprotein; tightly bound to apoenzyme by covalent bond

a)

Prosthetic

b)

Coenzyme

c)

Apoenzyme

d)

Holoenzyme

71.

Only substrate with the matching shape fits

a)

Products

b)

Lock-and-key

c)

Induced-fit

d)

Noncompetitive

72.

Reactant in biochemical reaction

a)

Active site

b)

Products

c)

Substrate

d)

Apoenzyme

73.

An enzyme with co-factor removed

a)

Prothetic

b)

Apoenzyme

c)

Holoenzyme

d)

Coenzyme

74.

Group of proteins that display no catalytic activity

a)

Apoenzyme

b)

Zymogens

c)

Zwitterion

d)

Enzyme

75.

Near a pH of 6

a)

Basic

b)

Acidic

c)

Base

d)

Neutral

76.

Loosely bound by noncovalent bond

a)

Prosthetic

b)

Apoenzyme

c)

Coenzyme

d)

Haloenzyme

77.

Linoleic Acid is what kind of Unsaturated fat?

a)

Poly

b)

Mono

c)

Di

d)

Oligo

78.

Used to prepare vaccines against diseases

a)

Proteins

b)

Heat

c)

Heat denaturation

d)

Anemia

79.

Oleic acid is what kind of unsaturated fat?

a)

Poly

b)

Di

c)

Mono

d)

Oligo

80.

Partially hydrogenated, some of the double bonds change

a)

Sis

b)

Cis

c)

Frans

d)

Trans

81.

Part of a cell membrane and acts as an emulsifier

a)

Triglycerides

b)

Fatty Acids

c)

Phospholipids

d)

Globular

82.

Proteios means

a)

Primary

b)

Secondary

c)

Prime

d)

Second

83.

Classified by the polarity of the R group

a)

Monomer

b)

Peptide bond

c)

Amino acids

d)

Linoleic

84.

Increasing pH causes zwitterion to

a)

Lose electron

b)

Pick proton

c)

lose proton

d)

Pick electron

85.

pH of the solution affects the charge on amino acids

a)

Isoelectric

b)

Isoelectric point

c)

Isolectric

d)

Isolectric point

86.

When proteins are at a pH...

a)

The net is positive

b)

The net is negative

c)

Net is both positive and negative

d)

Net is either positive or negative

87.

Causes uterus to contract

a)

Vassopressin

b)

Oxytocin

c)

Antidiuretic Hormone

d)

Adrenocorticotropic Hormone

88.

Can be form between a variety of side chains

a)

Hydrophobic interaction

b)

Disulfide bridges

c)

Salt bridges

d)

Hydrogen bonds

89.

High values of pH

a)

Acidic

b)

Neutral

c)

Basic

d)

Base

90.

How is the solution of amino acids and protein can act as buffers?

a)

Because of H3O+ and OH-

b)

Because of H2O+ and OH-

c)

Because of HO3+ and OH-

d)

Because of H3O+ and OH+

91.

Are easily oxidated to form disulfide bonds

a)

Cysteine

b)

Cystine

c)

Thiols

d)

SH

92.

Chains up to 50 amino acids

a)

Protein

b)

Polypeptide

c)

Peptide

d)

Enzyme

93.

Chains more than 50 amino acids

a)

Protein

b)

Peptide

c)

Polypeptide

d)

Enzymes

94.

The residue with a free amino group and is written non the left end of the chain

a)

C-Terminal

b)

N-Terminal

c)

C-terminal

d)

N-terminal

95.

They are nonpeptide hormones secreted by pituitary gland

a)

Triglycerides & Fatty acids

b)

Vasopresin & Oxidated

c)

Vassopressin & Oxytossin

d)

Vasopressin & Oxytocin

96.

Only amino acid that contains sulfhydryl

a)

Cysteine

b)

Thiol

c)

Cystine

d)

SH

97.

Lower values of pH

a)

Base

b)

Basic

c)

Acidic

d)

Neutral

98.

Result from the attraction of nonpolar group

a)

Disulfide bridges

b)

Salt bridges

c)

Hydrophobic interactions

d)

Hydrogen bond

99.

Catalyze 1 type of reaction for similar substrate

a)

Group

b)

Single

c)

Absolute

d)

Linkage

100.

Vassopressin is known as

a)

Antidiuretic Hormone

b)

Antideiretic Hormone

c)

Adrenocorticotropic Hormone

d)

Andrenocorticotropic Hormone

101.

Made up of 4 subunits: 2 a-chains and 2 b-chains

a)

Hemoglobin

b)

Collagen

c)

Tranferrin

d)

Keratin

102.

Causes blood vessel to constrict

a)

ACTH

b)

Prolactin

c)

Vasopressin

d)

Angiotensin II

103.

The temp at which enzymatic reaction the fastest

a)

Optimum temp

b)

Partial temp

c)

Max temp

d)

Minimum temp

104.

With a free carboxylate group and is written on the right end of the chain

a)

N-terminal

b)

N-terminals

c)

C-terminal

d)

C-terminals

105.

Function for growth & thyroid

a)

Protective

b)

Nerve impulse

c)

Storage

d)

Regulatory

106.

blood protein that carries fatty acids

a)

Hemoglobin

b)

Serum albumin

c)

Transferrin

d)

Alanine

107.

Carries oxygen from lungs to other body tissues

a)

Hemoglobin

b)

Serum albumin

c)

Tranferrin

d)

Thiols

108.

Carries iron in blood plasma

a)

Transferrin

b)

Serus albumin

c)

Hemoglobin

d)

WBC

109.

Long rod-shaped or string like molecules

a)

Glovular

b)

Globular

c)

Fibrous

d)

Simple

110.

Several protein chains that lie side by side

a)

A-helix

b)

B-helix

c)

B-pleated sheet

d)

A-pleated sheet

111.

Controls metabolism for carbohydrates

a)

Insulin

b)

Gastrin

c)

Penicillin

d)

Glucagon

112.

Attractions between ions that result from the interaction of ionized side chains

a)

Disulfide bridges

b)

Salt bridges

c)

Hydrogen bonds

d)

Hydrophobic interaction

113.

Hemoglobin in a person that has one-amino acid difference in the 6th position of the 2 b-chains of normal HbA

a)

Anemia

b)

Anemic

c)

Amide

d)

Sickle anemia

114.

When pH is near at isoelectric point..

a)

Net is positive

b)

Net is negative

c)

Net is zero

d)

Net is both positive and negative

115.

When 2 or more polypeptide chains

a)

Primary

b)

Secondary

c)

Tertiary

d)

Quaternary

116.

Can by hydrolyzed under acidic or basic condition

a)

Anemic

b)

Anemia

c)

Amide

d)

Amino acids

117.

Enzymes can increase reaction rates by..

a)

10-20 times

b)

10-25 times

c)

5-20 times

d)

10-30 times

118.

Is often used to kill m.o

a)

Heat

b)

Fire

c)

Ice

d)

Cold

119.

Enzymes plays an important role in

a)

Metabolism

b)

Diagnostic

c)

Therapeutics

d)

Diagnosis

120.

Double bonded that start at eth

a)

Alkene

b)

Alkane

c)

Alkyne

d)

Alkine

121.

Reduces the urine form

a)

ADH

b)

ACTH

c)

HCH

d)

FSH

122.

Classification of enzymes that has a reduction-oxidation reaction

a)

Lysase

b)

Oxidoreductases

c)

Isomerases

d)

Ligases

123.

Catalyze 1 type of reaction for single substrate

a)

Single

b)

Absolute

c)

Group

d)

Linkage

124.

single protein chain twisted to resemble a coil shape

a)

A-helix

b)

D-helix

c)

O-helix

d)

B-helix

125.

Single bonded that starts at meth

a)

Alkyne

b)

Alkane

c)

Alkene

d)

Alkine

126.

Organic material containing Hg (mercurochrome & merthiolate) is what

a)

Common topical antiseptic

b)

Rare topical antiseptic

c)

Common tropical antiseptic

d)

Rare tropical antiseptic

127.

Molecular range of Proteins

a)

5000 amu - trillion

b)

6000 amu - million

c)

6000 amu - trillion

d)

500 amu - million

128.

First push to start reaction

a)

Energy activation

b)

Mechanism of action

c)

Enviromental condition

d)

Nomenclature

129.

Function for the components of skeleton

a)

Structural

b)

Movement

c)

Transport

d)

Protective

130.

Is the region that contains residue that helps to hold the substrate

a)

Active site

b)

Binding site

c)

Catalytic site

d)

Co-factors

131.

Classification of enzymes that move chemical group

a)

Transferases

b)

Hydrolases

c)

Isomerases

d)

Ligases

132.

IUPAC means

a)

Naming of compounds

b)

International naming

c)

International union of pure and applied chemistry

d)

International unison of pure and applied chemistry

133.

Formation of ester linkage

a)

Decarboxylase

b)

Phosphatase

c)

Peptidase

d)

Esterase

134.

Catalyze 1 type of reaction for specific type of bond

a)

Bonding

b)

Linkage

c)

Lickage

d)

Bonds

135.

Removal of carboxyl groups from compounds

a)

Decarboxylase

b)

Phophatase

c)

Peptidase

d)

Esterase

136.

Hydrolysis of phosphate ester linkage

a)

Decarboxylase

b)

Phosphatase

c)

Peptidase

d)

Esterase

137.

Regulated the production of steroid hormone

a)

ADH

b)

ACTH

c)

Gastrin

d)

Oxytocin

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