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Biochem 2 Flashcards

1
Q 
Extracellular ammonia is transported from skeletal muscle to the liver by?
A.	L—Ornithine
B.	L—Ketoglutarate
C.	L—Glutamate
D.	L—Alanine
A

D. L—Alanine

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2
Q 
The molecule that enzymes act upon is known as?
A.	Product
B.	Proteins
C.	Amino acids
D.	Substrate
A

D. Substrate

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3
Q 
Which is a product of Pyruvate and can inner the TCA cycle?
A.	Acetyl CoA
B.	CO2
C.	Isocitrate
D.	Oxaloacetic
A

A. Acetyl CoA

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4
Q 
The Monosaccharide in the structure is a?
       C==OOH
       C
       C
       C
       C==OH
A.	Aldohexose
B.	Pentohexose
C.	Ketopentose
D.	Ketohexose
A

C. Ketopentose

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5
Q 
Which disease would occur if there was a deficiency in the enzyme for the conversion of Phenylalanine to tyrosine?
A.	Maple syrup urine disease
B.	Phenylketonuria
C.	Tyrosemia
D.	Ketohexose
A

B. Phenylketonuria

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6
Q 
Pantothentic acid is necessary for production of?
A.	Coenzyme A
B.	Amino acids
C.	Cobalamine
D.	Cytochrome B
A

A. Coenzyme A

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7
Q 
As the density of lipoproteins is increased  ?  decreases and  ?  increases?
A.	Protein, sterol
B.	Tricylycerol, sterol
C.	Triacylglycerol, proteins
D.	Protein, triacylgycerol
A

C. Triacylglycerol, proteins

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8
Q 
Which is responsible for carboxylation Rx?
A.	Pyrodoxine
B.	Biotin 
C.	Thiamine
D.	ATP
A

B. Biotin

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9
Q 
Which is the active form of folate?
A.	Folic acid
B.	Folacin
C.	Dihydrofolate
D.	Tetrahydrofolate
A

D. Tetrahydrofolate

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10
Q 
DNA complementary strand would be which for 5’ ATGCTACG 3’
A.	5’ TACGATGC 3’
B.	5’ UACGAUGC 3’
C.	3’ TACGATGC 5’
D.	3’ UACGAUGC 5’
A

C. 3’ TACGATGC 5’

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11
Q 
Which is considered to be the most saturated?
A.	Coconut oil
B.	Corn oil
C.	Sunflower oil
D.	Safflower oil
A

A. Coconut oil

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12
Q 
Which is lacking in the strict vegetarian’s diet?
A.	Vitamin D.  
B.	Ascorbic acid 
C.	Cobalamine 
D.	Tocopherol
A

C. Cobalamine(B12)

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13
Q 
Which is an important adjunct in the absorption of glucose?
A.	Chromine
B.	Selenium 
C.	Magnesium
D.	Zn
A

A. Chromine Assists insulin

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14
Q 
Which is the best source of dietary vitamin C.?
A.	Eggs and oil
B.	Broccoli and fruit
C.	Pork
D.	Cereals and grain
A

B. Broccoli and fruit

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15
Q 
Glucose is highest in which of the following foods?
A.	Eggs
B.	Soy 
C.	Cereals  
D.	Animal liver 
A

C. Cereals

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16
Q 
Beta oxidation occurs in  \_\_ and is a  \_\_\_  process?
A.	Cytoplasm, oxidation
B.	Mitochondria, reduction
C.	Ribosomes, reduction
D.	Muscles, isotonic
A

B. Mitochondria, reduction

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17
Q 
Which vitamin required for the uptake of Lipoproteins in the intestines?
A.	B. 5
B.	B-1
C.	C.
D.	K.
A

D. K.

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18
Q 
a deficiency of vitamin B12 causes what kind of anemia?
A.	Pernicious
B.	Microcytic
C.	Hypochromic
D.	Hyperchromic
A

A. Pernicious

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19
Q 
Which is responsible for forming D-oxyribose for ribonucleic acid
A.	Oxidation
B.	Reduction
C.	Decarboxylation
D.	Transamination  B6
A

A. Oxidation

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20
Q 
What cycle contains coenzyme Q?
A.	Glycolysis
B.	TCA
C.	Electron transport chain
D.	Urea cycle
A

C. Electron transport chain

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21
Q 
Anaerobic Glycolysis yields how many ATP?
A.	0
B.	2
C.	6
D.	8
A

B. 2

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22
Q 
Ketones results from?
A.	Glycolysis of glucose
B.	Gluconeogenesis of amino acids
C.	Beta oxidation
D.	Incomplete oxidation of fats
A

D. Incomplete oxidation of fats

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23
Q 
Which are pyrimidines?
A.	Uracil, cytosine
B.	Thiamine, adnine
C.	Adnine, guanine
D.	Guanine, cytosine
A

A. Uracil, cytosine

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24
Q 
What type of bond holds DNA strands together
A.	H
B.	Ester
C.	S
D.	Peptide
A

A. H

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25
Q

Which is the limiting amino acid in grains?
A. Lysine
B. Methionine
C. Leucine

A

A. Lysine

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26
Q

Which is the function of ascorbic acid?
A. Increased iron absorption
B. Decreased iron absorption

A

A. Increased iron absorption

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27
Q 
Malate is off the by which of the following
A.	Citrate
B.	Oxaloacate
C.	Isocitrate
D.	Succinate
A

B. Oxaloacate

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28
Q 
Which provides nicotinamide?
A.	Serotonin
B.	Methionine
C.	Lysine
D.	Glycine
A

A. Serotonin

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29
Q 
All amino acids at a pH of 7 has its isoelectric point at a pH of 6, therefore it will be?
A.	In the form of a Zwitter ion
B.	Negatively charged
C.	Positively charged
D.	It’s isoelectric point
A

B. Negatively charged

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30
Q 
A 100Kg adult male requires approximately how many g. of dietary protein per day?
A.	20
B.	40
C.	75
D.	150
A

C. 75

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31
Q 
Sucrose can be broke down to what and what?
A.	Glucose, glucose  
B.	Glucose, Galactose 
C.	Glucose, Fructose 
D.	Glucose, Maltose
A

C. Glucose, Fructose

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32
Q 
Which is the most active form of vitamin D.?
A.	HMG CoA
B.	Ergocalciferol
C.	25 Hydroxycalciferol
D.	1,25 Dehydroxycalciferol
A

D. 1,25 Dehydroxycalciferol

33
Q 
Which is the regulating enzyme in cholesterol biosynthesis?
A.	HMG CoA reductase
B.	Lipoprotein lipase
C.	Phosphofructokinase
D.	Xanthine oxidase
A

A. HMG CoA reductase

34
Q 
Which increases the Serum Ca levels?
A.	Calcitonin
B.	Parathormone
C.	Thyroxine
D.	Adrenaline
A

B. Parathormone

35
Q

Which is not part of an animal cell membrane?
A. Cholesterol
B. Phosphatidyl
C. Tristeapisin

A

C. Tristeapisin

36
Q

The alpha Helix and data pleated sheets are what type of structures?
A. Primary protein structures
B. Secondary protein structures
C. Tertiary protein structures

A

B. Secondary protein structures

37
Q 
What type of bond holds DNA bases together
A.	Esther
B.	S
C.	Peptide
D.	H
38
Q 
Which one is specifically for elongation of a fatty acid chain in biosynthesis?
A.	Hydrolase
B.	NADPH
C.	FADH2
D.	Thiamine phosphosphate
39
Q 
What is the reducing agent in fatty acid biosynthesis?
A.	Biotin
B.	Carbon dioxide
C.	NADPH
D.	FAD
40
Q 
Oxidation of FA yielding CO2 & H2O going through beta oxidation goes through?
A.	TCA and Gluconeogenesis
B.	Pentose phosphate pathway and TCA
C.	TCA an electron transport train
D.	TCA and Glycolysis
A

C. TCA an electron transport train

41
Q 
Most cells can rapidly synthesize Aspartate from?
A.	Citrulline
B.	Oxaloacetate
C.	Pyruvate
D.	Malate
A

B. Oxaloacetate

42
Q 
Which is a branch chain amino acid?
A.	Tyrosine
B.	Tryptophan
C.	Phenylalanine
D.	Leucine
A

D. Leucine

43
Q 
Which is not a derivative of tyrosine?
A.	Thyroxine
B.	Serotonin
C.	Epinephrine
D.	Norepinephrine
A

B. Serotonin

44
Q 
Which is the greatest source of pectin?
A.	Milk
B.	Fruit
C.	Meat
D.	Eggs
45
Q 
Which is responsible for producing endogenous Triglycerides?
A.	LDL
B.	HDL
C.	IDL
D.	VLDL
46
Q 
By which mechanism do humans eliminate cholesterol?
A.	Metabolism of carbon dioxide
B.	Metabolism of CoA
C.	Excretion via urine
D.	Excretion via feces
A

D. Excretion via feces

47
Q 
Which is a polypeptide hormone?
A.	Epinephrine
B.	Insulin
C.	Testosterone
D.	Cortisol
A

B. Insulin

48
Q 
What type of bonds are between amino acids?
A.	Peptide
B.	Amide
C.	H
D.	S
A

A. Peptide

49
Q 
Which is a characteristic of a spontaneous reaction?
A.	Standard free energy is negative
B.	And enzyme catalyzed the reaction
C.	Gibbs free energy is negative
D.	Frequency is greater than free energy
A

C. Gibbs free energy is negative

50
Q 
How a bases are found on the carbons?
A.	1
B.	2
C.	3
D.	4
51
Q 
Acetyl CoA carboxylase catalyzes the conversion of acetyl CoA to?
A.	Malonyl CoA
B.	Pyruvate
C.	Succinate
D.	Alpha ketogluterate
A

A. Malonyl CoA

52
Q

Which is a product of Pyruvate that may enter the TCA cycle?
A. Acetyl CoA
B. malonyl CoA

A

A. Acetyl CoA

53
Q 
Purine N is derived from?
A.	Amino acids/uric acid
B.	Amino acid/creatine
C.	Uric acid/amino acids
D.	Amino acid/urea
A

A. Amino acids/uric acid

54
Q

tRNA is responsible for?
A. Information to the ribosomes
B. Binds 2 DNA strands
C. Supplying amino acids to complete a specific protein chain.
D. Transcription of a code or protein production

A

C. Supplying amino acids to complete a specific protein chain.

55
Q 
What glycosidic bond is found in Glycogen
A.	Beta 1, 6
B.	Beta 1, 4
C.	Alpha 1, 4
D.	Alpha 1, 4 and 1, 6
A

D. Alpha 1, 4 and 1, 6

56
Q 
What depicts reverse transcription
A.	DNA-> RNA
B.	RNA-> RNA
C.	RNA->DNA
D.	DNA-> DNA
A

C. RNA->DNA

57
Q 
Lack of B12 results in a deficiency of what?
A.	Pyruvate
B.	Hemocystine
C.	Glycine
D.	Methionine
A

C. Glycine

58
Q 
What amino acid is converted to indole in the intestine?
A.	Alanine
B.	Phenylalanine
C.	Tryptophan
D.	Ornithine
A

C. Tryptophan

59
Q 
What carbon source supplies the glycerol portion of the triglyceride for lipogenesis?
A.	HMG CoA
B.	Acetyl CoA
C.	Glucose
D.	Palmitate
A

B. Acetyl CoA

60
Q

What is a for carbon glucose precursor?
A. Glycerate
B. Pyruvate
C. Fumerate

A

A. Glycerate

61
Q 
What is not a product of the pentose phosphate pathway?
A.	ATP
B.	NADPH
C.	Fructose-6-phosphate
D.	3-phosphoglyceraldehyde
A

D. 3-phosphoglyceraldehyde

62
Q 
Which is a mucopolysaccharide?
A.	Amylose
B.	Glycogen 
C.	HemiCellulose
D.	Hyaluronic acid
A

D. Hyaluronic acid

63
Q 
The biosynthesis of cholesterol begins with?
A.	Acetyl CoA
B.	Malony CoA
C.	Mevalonate
D.	Sequalene
A

A. Acetyl CoA

64
Q 
The reductive step in fatty acid biosynthesis requires?
A.	NAD
B.	NADPH
C.	Acetyl CoA
D.	FAD2
65
Q 
What’s the final stage in the complete metabolism of fat?
A.	TCA cycle
B.	Beta oxidation cycle
C.	Anerobic Glycolysis
D.	Aerobic Glycolysis
A

A. TCA cycle

66
Q 
What is the significant intermediate in cytoplasmic biosynthesis of fatty acids?
A.	Mevalonic acid
B.	Pyruvic acid
C.	Malonyl CoA
D.	Beta hydroxybuctyric acid
A

C. Malonyl CoA

67
Q 
Free radicals are highly radicals substances that result from what type of lipids?
A.	Peroxidation
B.	Hydrogenation
C.	Esterification
D.	Saturation
A

A. Peroxidation

68
Q 
What are components of triglycerides?
A.	Cholesterol and Phospholipids
B.	Cholesterol and fatty acids
C.	Fatty acids and glycerol
D.	Fatty acids and Phospholipids
A

C. Fatty acids and glycerol

69
Q 
Homocystiene is a product of the demineralization of?
A.	Alanine
B.	Methionine
C.	Phenylalanine
D.	Glutamine
A

B. Methionine

70
Q 
What is not an effect on the hydrogenation , vegetable oil?
A.	Prolonged shelf life
B.	Decreased iodine #
C.	Lower melting point
D.	Destruction of essential fatty acids
A

C. Lower melting point

71
Q 
To generate an unsaturated fatty acid a saturated fatty acid must undergo?
A.	Reduction
B.	Oxidation
C.	Hydrogenation
D.	Deamination
A

A. Reduction

72
Q

Following the action of lipoprotein lipase the very low density lipoprotein remnant becomes?
A. Free fatty acid
B. High density lipoprotein
C. Low-density lipoprotein

A

C. Low-density lipoprotein

73
Q 
Cholesterol is not a part of which food?
A.	Fish
B.	Beef
C.	Peanuts
D.	Whole milk
A

C. Peanuts

74
Q 
What lipids comprise the majority of dietary fats?
A.	Glycolipid
B.	Triglyceride
C.	Cholesterol
D.	Lipoproteins
A

B. Triglyceride

75
Q 
Oxaloacetate is the alpha keto of?
A.	Alanine
B.	Glutamic acid
C.	Threonine
D.	Aspartic acid
A

D. Aspartic acid

76
Q

Catobolism of heme results in formation of?
A. Bile acids
B. Bilirubin

A

B. Bilirubin

77
Q

How many essential amino acids are aromatic?
A. 2
B. 3
C. 4

78
Q 
What process converts pyruvic acid to Alanine?
A.	Transamination
B.               Decarboxylation
C.               Oxidation
D.               Reduction
A

A. Transamination

79
Q 
What amino acid has the greatest positive net charge at the normal pH of blood?
A.	Cysteine
B.               Glycine
C.               Alanine
D.               Tryptophan
A

A. Cysteine

Boards Part 1 Practice questions (15 decks)

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