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ChT Reviewer > ORG CONCEPTS > Flashcards

ORG CONCEPTS Flashcards

1
Q

The two strands of DNA are said to be
A. oppositely charged
B. complementary
C. identical
D. partners

A

B. complementary

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2
Q

The amino acid sequence of a polypeptide chain comprises the _____ structure of the protein.
A. primary
B. secondary
C. tertiary
D. quarternary

A

A. primary

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3
Q

An amino acid with a polar R group
A. Cysteine
B. Phenylalanine
C. Leucine
D. Valine

A

A. Cysteine

“polar R group”

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4
Q

An amino acid with a basic R group
A. Alanine
B. Arginine
C. Proline
D. Glutamine

A

B. Arginine

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5
Q

An amino acid that is electrically neutral at pH5
A. Aspartic acid
B. Histidine
C. Glycine
D. Threonine

A

C. Glycine

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6
Q

An amino acid that will move towards the cathode at pH10
A. Glutamic acid
B. Tyrosine
C. Lysine
D. Valine

A

C. Lysine

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7
Q

A test for the presence of benzene ring in protein
A. Biuret
D. Xanthoproteic

A

D. Xanthoproteic

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8
Q

Protein present in bones
A. collagen
B. fibroin
C. elastin
D. keratin

A

A. collagen

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9
Q

Protein in grains
A. lactalbumin
B. myosin
C. leucasin
D. globulin

A

globulin

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10
Q

Simple protein in blood
A. edestin
B. fibrinogen
C. myosin
D. glutenin

A

B. fibrinogen

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11
Q

An alkaloidal reagent that is used in the treatment of burns
A. tannic acid
B. picric acid
C. phosphotungstic acid
D. phosphomolybdic acid

A

A. tannic acid

“TAN” = burns

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12
Q

A conjugated protein with colored pigment
A. chromoprotein
B. glycoprotein
C. nucleoprotein
D. phosphoprotein

A

A. chromoprotein

“CHROMO” = color

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13
Q

The Xanthoproteic test is a test for the presence of …
A. Tryptophan
B. Serine
C. Tyrosine
D. Threonine

A

C. Tyrosine

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14
Q

A color test for protein that uses glyoxylic acid as reagent
A. Millons
B. Xanthoproteic
C. Hopkins Cole

A

C. Hopkins Cole

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15
Q

A dipolar ion formed when amino acid undergoes self protonation
A. anion
B. cation
C. Zwitter ion
D. AOTA

A

C. Zwitter ion

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16
Q

DNA is the genetic material of the cells. The building block of DNA are:
A. amino acids
B. monosaccharides
C. disaccharides
D. nucleotides

A

D. Nucleotides

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17
Q

Enzymes are molecules that speed up chemical reactions. All enzymes are
A. carbohydrates
B. nucleic acids
C. proteins
D. lipids

A

C. proteins

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18
Q

When proteins are broken down by enzymes, the products are:
A. amino acids
B. carbohydrates
C. fatty acids
D. nucleic acids

A

A. amino acids

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19
Q

A nucleotide contains _____.
A. sulfur
B. nitrogen base
C. 6-carbon sugar
D. all of the above

A

B. nitrogen base

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20
Q

Which of the following vitamins are all fat soluble.
A. ABCD
B. ACDE
D. ADEK
D. BCDE

A

D. ADEK

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21
Q

Defficiency of this vitamin will cause scurvy.
A. Vit A
B. Vit B
C. Vit C
D. Vit D

A

vitamin C

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22
Q

Vitamin B6 is also known as,
A. Niacin B. Pyridoxin C. Thiamin D. Rivoflavin

A

B. Pyridoxin

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23
Q

A vitamin that function as an antioxidant.
A. Vit A B. Vit B C. Vit C D. Vit D

A

vitamin C

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24
Q

Phylloquinone is commonly known as,
A. Vit B3 B. Vit K C. Vit F D. Vit H

A

B. Vit K

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25
Q

The nucleotide of DNA have __________ bases.
A. purine B. pyrimidine C. either A or B D. neither A or B

A

C. either A or B

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26
Q

The preparation of alkyl halide that obeys Markovnikovs Rule
A. Hydrogenation
C. Hydrohalogenation
B. Halogenation
D. Hydration

A

C. Hydrohalogenation

addition of alkyl halide to alkene

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27
Q

The solvent used for the preparation of Grignard reagent.
A. Alcohol C. Acid
B. Ether D. Ester

A

B. Ether

28
Q

Which of the following alcohol will react faster with HBr?
A. n-butanol
C. 2-butanol
B. 2-methyl-1-propanol
D. 2-methyl-2-propanol

A

A. n-butanol

29
Q

The enzyme that aids in the fermentation of sugar to alcohol.
A. Diastase
C. Maltase
B. Zymase
D. Glucosidase

A

B. Zymase

30
Q

Which method is not used in the preparation of simple alcohol.
A. Hydration of alkenes
C. Fermentation of sugar
B. Hydrolysis of alkyl halides
D. Oxidation of alkenes

A

D. Oxidation of alkenes

produce carbonyls

31
Q

The method of preparation that gives high percentage of alcohol.
A. Diborane method
C. Sulfonation
B. Hydrolysis
D. Reduction

A

B. Hydrolysis

32
Q

A toxic compound formed by distillation of ethylene glycol.
A. Diethylene glycol
C. Ethylene oxide
B. Diethyl ether
D. Dioxane

A

C. Ethylene oxide

33
Q

Which compound has the highest density?
A. Fluorobutane
C. Chloropentane
B. 2-methyl-1-iodopentane
D. Bromohexane

A

B. 2-methyl-1-iodopentane

high molecular weight + presence of halogens = high density

34
Q

Alcohol act as an acid if it reacts with;
A. HBr
C. K
B. CH3ONa
D. NaOH

A

D. NaOH

35
Q

A reaction of ester that will produce another ester.
A. Alcoholysis
B. Ammonolysis
C. Hydrolysis
D. Ozonolysis

A

D. Ozonolysis

36
Q

A soap use for water proofing.
A. Ag soap
B. Al soap
C. Cr soap
D. Cu soap

A

B. Al soap

37
Q

A soap used as dusting powder.
A. Al palmitate
B. Cu oleate
C. K laurate
D. Zn stearate

A

D. Zn stearate

38
Q

A soap used for treating ulcer.
A. Al palmitate
B. Cu oleate
C. K laurate
D. Zn stearate

A

C. K laurate

39
Q

An ester used as banana flavoring.
A. ethylmethanoate
B. methylpentanoate
C. pentylethanoate
D. octylethanoate

A

C. Pentylethanoate

or isoamyl acetate

40
Q

An inorganic ester that lowers blood pressure.
A. ethyl nitrate
B. ethyl sulfate
C. pentyl nitrate
D. glyceryl trinitrate

A

D. glyceryl trinitrate

41
Q

The flavor imparted by isoamyisovalerate.
A. Apple B. Banana C. Pear D. Pineapple

A

A. Apple

42
Q

An aldehyde that smells like green apple.
A. Methanal
B. Ethanal
C. Propanal
D. Butanal

A

B. Ethanal

or aldehyde

43
Q

A ketone with ethereal fragrance.
A. Methanone
B. Ethanone
C. Propanone
D. Butanone

A

D. Butanone

44
Q

The test for the presence of methyl carbonyl.

A

Haloforms

45
Q

An organic salt used as dye fastener.
A. Al ethanoate
B. Ca stearate
C. Fe butyrate
D. Na chloride

A

D. Na chloride

46
Q

A colorless and poisonous gas with an unpleasant odor.
A. Acrolein
B. Acrilan
C. Crotonaldehyde
D. Ketene

A

A. Acrolein

47
Q

The primary source of alkanes.
A. Petroleum B. Marsh gas C. Natural gas D. Biomass

A

A. Petroleum

48
Q

The study of the three dimensional structure of molecules.
A. Nomenclature B. Stereochemistry C. Structural theory D. Isomerism

A

B. Stereochemistry

49
Q

Thermal decomposition of alkanes.
A. Hydrogenation B. Combustion B. Oxidation C. Pyrolysis

A

C. Pyrolysis

50
Q

Which of the alkanes below has the lowest boiling point
A. n-pentane
B. isopentane
C. neopentane
D. Sec-pentane

A

A. n-pentane

51
Q

Electrovalent bond

A

ionic = greater than 1.7

52
Q

coordinate covelent bond

A

formed when one atom donates both electrons to a bond, while the other atom contributes none.

53
Q

The electron acceptor in CH3NO2
A. C B. N C. O D. H

A

D. H

Electron Acceptors: In a molecule, an electron acceptor is typically an atom that has a higher electronegativity or can stabilize a negative charge effectively.

54
Q

The electron donor in H2SO4
A. H
B. O
C. S
D. NOTA

A

B. O

Electron Donors: An electron donor is typically an atom or a group of atoms that can provide electrons to another atom or molecule.

55
Q

The formal charge of P in H3PO3
A. +2
B. +1
C. 0
D. -1

A

C. 0

phosphorous acid

56
Q

The structure of SO2 molecule.
A. linear B. planar C. tetragonal D. tetrahedral

A

B. Planar

has a lone pair = not tetrahedral

57
Q

direct reserve source of enerrgy in the human muscle is

A

glycogen

58
Q

Ethyl butanoate is an artificial flavor for
A. apple C. orange
B. banana D. pineapple

A

D. pineapple

59
Q

The aldehyde used as preservative.
A. Butanal C. Ethanal
B. Propanal D. Methanal

A

D. Methanal

60
Q

Freon is an example of
A. hydrocarbon C. alcohol
B. alkyl halide D. aldehyde

A

B. alkyl halide

61
Q

Rubbing alcohol is an example of
A. normal alcohol C. secondary alcohol
B. primary alcohol D. tertiary alcohol

A

C. secondary alcohol

62
Q

The hydrocarbon used as reference in measuring the quality
of gasoline.
A. n - hexane C. n - pentane
B. n - heptane D. n - octane

A

B. n - heptane

63
Q

The alcohol present in all drinking liquor.
A. Methyl alcohol C. Isopropyl alcohol
B. Ethyl alcohol D. Amyl alcohol

A

B. Ethyl alcohol

64
Q

An organic compound with pleasant odor.
A. Aldehyde C. Ester
B. Alcohol D. Ether

A

C. Ester

65
Q

The number of structural formulas possible for the alkyne C6H10.
A. two C. four
B. three D. five

A

C. four

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