Board Review 9/10/2018 Biochem Test 1 1

  1. Extracellular ammonia is transported from skeletal muscle to the liver by?
  1. L—Ornithine
  2. L—Ketoglutarate
  3. L—Glutamate

D.L—Alanine

  1. The molecule that enzymes act upon is known as?
  1. Product
  2. Proteins
  3. Amino acids

D.Substrate

  1. Which is a product of Pyruvate and can inner the TCA cycle?

A.Acetyl CoA

  1. CO2
  2. Isocitrate
  3. Oxaloacetic
  1. Skip, it was a drawing of DNA and RNA that needed to be compared.
5. The Monosaccharide in the structure is a?
C==OOH
C
C
C
C==OH
  1. Aldohexose
  2. Pentohexose

C.Ketopentose

  1. Ketohexose
  1. Which disease would occur if there was a deficiency in the enzyme for the conversion of Phenylalanine to tyrosine?
  1. Maple syrup urine disease

B.Phenylketonuria

  1. Tyrosemia
  2. Ketohexose
  1. Pantothentic acid is necessary for production of?

A.Coenzyme A

  1. Amino acids
  2. Cobalamine
  3. Cytochrome B
  1. As the density of lipoproteins is increased ? decreases and ? increases?
  1. Protein, sterol
  2. Tricylycerol, sterol

C.Triacylglycerol, proteins

  1. Protein, triacylgycerol
/
  1. Which is responsible for carboxylation Rx?
  1. Pyrodoxine
  2. Biotin Tin Box
  3. Thiamine
  4. ATP
  1. Which is the active form of folate?
  1. Folic acid
  2. Folacin
  3. Dihydrofolate

D.Tetrahydrofolate

  1. DNA complementary strand would be which for 5’ ATGCTACG 3’
  1. 5’ TACGATGC 3’
  2. 5’ UACGAUGC 3’

C.3’ TACGATGC 5’

  1. 3’ UACGAUGC 5’
  1. Which is considered to be the most saturated?

A.Coconut oil

  1. Corn oil
  2. Sunflower oil
  3. Safflower oil
  1. Which is lacking in the strict vegetarian’s diet?
  1. Vitamin D.  rickets
  2. Ascorbic acid vitamin C.  scurvy
  3. Cobalamine B12
  4. Tocopherol vitamin E.
  1. Which is an important adjunct in the absorption of glucose?
  1. Chromine assist insulin
  2. Selenium goes with vitamin E.
  3. Magnesium
  4. Zn assist vitamin A.
  1. Which is the best source of dietary vitamin C.?
  1. Eggs and oil

B.Broccoli and fruit

  1. Pork
  2. Cereals and grain
  1. Glucose is highest in which of the following foods?
  1. Eggs
  2. Soy protein
  3. Cereals  starch
  4. Animal liver  protein
  1. Beta oxidation occurs in ? and is a ? process?
  1. Cytoplasm, oxidation

B.Mitochondria, reduction

  1. Ribosomes, reduction
  2. Muscles, isotonic

  1. Which vitamin required for the uptake of Lipoproteins in the intestines?
  1. B. 5
  2. B-1
  3. C.
  4. K.
  1. A. deficiency of vitamin B12 causes what kind of anemia?

A.Pernicious

  1. Microcytic
  2. Hypochromic
  3. Hyperchromic
  1. Which is responsible for forming D-oxyribose for ribonucleic acid
  1. Oxidation
  2. Reduction
  3. Decarboxylation
  4. Transamination  B6
  1. What cycle contains coenzyme Q?
  1. Glycolysis
  2. TCA

C.Electron transport chain

  1. Urea cycle
  1. Anaerobic Glycolysis yields how many ATP?
  1. 0

B.2

  1. 6
  2. 8
  1. Ketones results from?
  1. Glycolysis of glucose
  2. Gluconeogenesis of amino acids
  3. Beta oxidation

D.Incomplete oxidation of fats

  1. Which are pyrimidines?

A.Uracil, cytosine

  1. Thiamine, adnine
  2. Adnine, guanine
  3. Guanine, cytosine
  1. What type of bond holds DNA strands together

A.H

  1. Ester
  2. S
  3. Peptide
  1. Which is the limiting amino acid in grains?

A.Lysine

  1. Methionine
  2. Leucine
/
  1. Which is the function of ascorbic acid?

A.Increased iron absorption

  1. Malate is off the by which of the following
  1. Citrate
  2. Oxaloacate
  3. Isocitrate
  4. Succinate
  1. Which provides nicotinanide

A.Serotonin

  1. Methionine
  2. Lysine
  3. Glycine
  1. All amino acids at a pH of 7 has its isoelectric point at a pH of 6, therefore it will be?
  1. In the form of a Zwitter ion

B.Negatively charged

  1. Positively charged
  2. It’s isoelectric point
  1. A 100Kg adult male requires approximately how many g. of dietary protein per day?
  1. 20
  2. 40

C.75

  1. 150
  1. Sucrose can be broke down to what and what?
  1. Glucose, glucose  Maltose
  2. Glucose, Galactose  lactose
  3. Glucose, Fructose Sucrose
  4. Glucose, Maltose
  1. Which is the most active form of vitamin D.?
  1. HMG CoA
  2. Ergocalciferol
  3. 25 Hydroxycalciferol

D.1,25 Dehydroxycalciferol

  1. Which is the regulating enzyme in cholesterol biosynthesis?

A.HMG CoA reductase

  1. Lipoprotein lipase
  2. Phosphofructokinase
  3. Xanthine oxidase
  1. Which  the Serum Ca levels?
  1. Calcitonin

B.Parathormone

  1. Thyroxine
  2. Adrenaline

  1. Which is not part of an animal cell membrane?
  1. Cholesterol
  2. Phosphatidal

C.Tristeapisin

  1. The alpha Helix and data pleated sheets are what type of structures?
  1. Primary protein structures

B.Secondary protein structures

  1. Tertiary protein structures
  1. What type of bond holds DNA bases together

A.Esther

  1. S
  2. Peptide
  3. H
  1. Which one is specifically for elongation of a fatty acid chain in biosynthesis?
  1. Hydrolase

B.NADPH

  1. FADH2
  2. Thiamine phosphosphate
  1. What is the reducing agent in fatty acid biosynthesis?
  1. Biotin
  2. Carbon dioxide

C.NADPH

  1. FAD
  1. Oxidation of FA yielding CO2 & H2O going through beta oxidation goes through?
  1. TCA and Gluconeogenesis
  2. Pentose phosphate pathway and TCA

C.TCA an electron transport train

  1. TCA and Glycolysis
  1. Most cells can rapidly synthesize Aspartate from?
  1. Citrulline

B.Oxaloacetata

  1. Pyruvate
  2. Malate
  1. Which is a branch chain amino acids?
  1. Tyrosine
  2. Tryptophan
  3. Phenylalanine

D.Leucine

  1. Which is not a derivative of tyrosine?
  1. Thyroxine

B.Serotonin

  1. Epinephrine
  2. Norepinephrine
/
  1. Which is the greatest source of pectin?
  1. Melt

B.Fruit

  1. Meat
  2. Egges
  1. skip
  1. Which is responsible for producing endogenous Triglycerides?
  1. LDD
  2. HDL
  3. IDL
  4. VLDL
  1. By which mechanism the humans eliminate cholesterol?
  1. Metabolism of carbon dioxide
  2. Metabolism of CoA
  3. Excretion via urine

D.Excretion via feces

  1. Which is a polypeptide hormone?
  1. Epinephri

B.Insulin

  1. Testosterone
  2. Cortisol
  1. What type of bonds are between amino acids?

A.Peptide

  1. Amide
  2. H
  3. S
  1. Which is a characteristic of a spontaneous reaction?
  1. Standard free energy is negative
  2. And enzyme catalyzed the reaction
  3. Gibbs free energy is negative
  4. Frequency is greater than free energy
  1. How a bases are found on the carbons?
  1. 1
  2. 2

C.3

  1. 4
  1. Acetyl CoA carboxylase catalyzes the conversion of acetyl CoA to?
  1. Maylonyl CoA
  2. Pyruvate
  3. Succinate
  4. Alpha ketogluterate

  1. Which is a product of Pyruvate may enter the TCA cycle?

A.Acetyl CoA

55. Purine N is derived from?

A.Amino acids/uric acid

  1. Amino acid/creatine
  2. Uric acid/amino acids
  3. Amino acid/urea
  1. tRNA is responsible for?
  1. Information to the ribosomes
  2. Binds 2 DNA strands
  3. Supplying amino acids to complete a specific protein chain.
  4. Transcription of a code or protein production
  1. Skip
  1. What glycosidic bond is found in Glycogen
  1. Beta 1 6
  2. Beta 1 4
  3. Alpha 1 4

D.Alpha 1 4 and 1 6

  1. What depicts reverse transcription
  1. DNA RNA
  2. RNA RNA
  3. RNA DNA
  4. DNA DNA
  1. Lack of B12 results in a deficiency of what?
  1. Pyruvate
  2. Hemocystine

C.Glycine

  1. Methionine
  1. What amino acid is converted to indole in the intestine?
  1. Alanine
  2. Phenylalanine

C.Tryptophane

  1. Ornithine
  1. What carbon source supplies the glycerol portion of the triglyceride for lipogensis?
  1. HMG CoA

B.Acetyl CoA

  1. Glucose
  2. Palmitate
  1. What is a for carbon glucose precursor?

A.Glycerate

  1. Pyruvate
  2. Fumerate
/
  1. Skip
  1. What is not a product of the pentose phosphate pathway?
  1. ATP
  2. NADPH
  3. Fructose-6-phosphate
  4. 3-phosphoglyceraldehyde
  1. Which is a mucoPolysaccharides
  1. Amylose
  2. Glycogen
  3. HemiCellulose

D.Hyaluronic acid

  1. What characteristics distinguish starch from Cellulose?
  1. Starch is digestible by humans in Cellulose is not.
  1. The biosynthesis of cholesterol begins with?

A.Acetyl CoA

  1. Malony CoA
  2. Mevalonate
  3. Sequalene
  1. The reductive step in fatty acid biosynthesis requires?
  1. NAD

B.NADPH

  1. Acetyl CoA
  2. FAD2
  1. What’s the final stage in the complete metabolism of fat?

A.TCA cycle

  1. Beta oxidation cycle
  2. Anerobic Glycolysis
  3. Aerobic Glycolysis
  1. What is the significant intermediate in cytoplasmic biosynthesis of fatty acids?
  1. Mevalonic
  2. Acid Pyruvic acid

C.Malonye CoA

  1. Beta hydroxybuctyric acid
  1. Free radicals are highly radicals substances that result from what type of lipids?

A.Peroxidation

  1. Hydrogenation
  2. Esterification
  3. Saturation

  1. What are components of triglycerides?
  1. Cholesterol and Phospholipids
  2. Cholesterol and fatty acids

C.Fatty acids and glycerol

  1. Fatty acids and Phospholipids
  1. Homocysteriene is a product of the demineralization of?
  1. Alanine

B.Methionine

  1. Phenylalanine
  2. Glutamine
  1. What is not an effect on the hydrogenation , vegetable oil?
  1. Prolonged shelf life
  2. Decreased iodine #

C.Lower melting point

  1. Destruction of essential fatty acids
  1. To generate an unsaturated fatty acid a saturated fatty acid must undergo?

A.Reduction

  1. Oxidation
  2. Hydrogenation
  3. Deamination
  1. Following the action of lipoprotein lipase the very low density lipoprotein remnant becomes?
  1. Free fatty acid
  2. High density lipoprotein

C.Low-density lipoprotein

  1. Cholesterol is not a part of which food?
  1. Fish
  2. Beef

C.Peanuts

  1. Whole milk
  1. What lipids comprise the majority of dietary fats?
  1. Glycolipid

B.Triglyceride

  1. Cholesterol
  2. Lipoproteins
  1. Oxaloacetate is the alpha keto of?
  1. Alanine
  2. Glutamic acid
  3. Threonine

D.Aspartic acid

  1. Catobolism of heme results in formation of?
  1. Bile acids

B.Bilirubin

/
  1. Which do not contribute directly to the total amino acid pool of the body?
  1. Dietary nucleic acids
  1. What process converts pyruvic acid to Alanine?
  1. Transamination
  1. What nutrients form a coenzyme which is used directly for amino acid Transamination?
  1. Pyroxine
  1. What is catecholamine synthesized from?
  1. Epinephrine
  1. How many essential amino acids are aromatic?
  1. 2
  1. Thyroxime is derived from?
  1. Threonine
  2. Tyrosine
  3. Tyramine
  4. Thiamine
  1. Enzymes that catalyze the interconversion of UDP-Galactose with UDP –glucose is an?
  1. Epimerase
  1. Enzymes that occur in the liver but not in the brain or muscle tissue?
  1. Glucose-6-phosphatase
  1. The quarternary structure of hemoglobin refers to what?
  1. Association of beta and alpha subunits
  1. What amino acid has the greatest positive net charge at the normal pH of blood?
  1. Cysteine
  1. Dietary protein allowances for a person weighing 80 kg is about how may grams?
  1. 64 g of protein
every 10 kg body weight = eight grams protein.