BIO213 List of eExam Questions in the Bank

Latex formatted questions may not properly render

Q1 Glycine can rotatate the plane of plane polarised light. True or false?

Q2 Serine is an essential amino acid.True or False?

Q3 All amino acids are chiral compounds.True or False ?

Q4 All amino acids are similar structurally.True of False?

Q5 are proteins which provide the body with defence against infections

Q6 An example of a protein that is found in the muscle necessary for muscular motion is .

Q7 The main protein that occurs in milk is __.

Q8 The fibrous protein responsible for the structure of hair and wool is _.

Q9 The prosthetic group in flavoprotein is

Q10 Amino acids that are not synthesized in the body and must be obtained from the diet are called _.

Q11 A co-enzyme tightly bound to the enzyme protein is called .

Q12 The complex polymer of amino acid responsible for the skin pigment formation is called

Q13 The first step in protein purification procedure is usually .

Q14 Glycine has two stereoisomers. True or false?

Q15 The semi-permeable membrane used in dialysis is known as

Q16 A zwitterion of any amino acid has a net charge of __.

Q17 Solutions with pH values less than 7 are

Q18 Hemoglobin has a total of protein chains in its quaternary structure.

Q19 In a typical amino acid zwitterion, the carboxylic acid end is .

Q20 Gel filtration separates molecules of proteins and peptides according to

Q21 The non-amino acid part of a conjugated protein is usually referred to as its .

Q22 A carbon atom to which four different functional groups are covalently linked is known as a/an .

Q23 The prosthetic group in hemoprotein is __.

Q24 are the building blocks of proteins.

Q25 Levorotatory molecules are designated by the prefix .

Q26 The protein that transports oxygen in the blood is __.

Q27 refers to the migration of charged molecules in an electric field.

Q28 Which amino acids contain an imidazole group, Tryptophan or Histidine? _.

Q29 A typical amino acid has functional groups.

Q30 Amino acid is said to be if it rotates the plane to the left

Q31 The protein part of an enzyme is called .

Q32 The three-letter abbreviation of Glutamine is

Q33 The side chain in alanine is replaced with _.

Q34 Gel electrophoresis is carried out in which acts as a molecular sieve.

Q35 Salting in refers to increase in at low ionic strength with the increase in salt concentration

Q36 Stereoisomers that are not mirror images of each other are called __.

Q37 Stereoisomers that are mirror images of each other are called .

Q38 Collagen is a protein

Q39 A weak acid is one which dissociates in water.

Q40 The biological activity of a protein is determined by its __.

Q41 Amino acids that the body cannot synthesize de novo but has to be supplied in the human diet are called _.

Q42 The purpose of cell disruption is .

Q43 α-helix is a secondary protein structure. True or false?

Q44 Hydrogen bonds are important in the secondary structure of a protein. True or False?

Q45 The three-letter abbreviation of the amino acid- Tryptophan is

Q46 The structural formulas of amino acids are the same except for the carboxyl group. True or false? .

Q47 The pH of a solution with 0.82 M hydrogen ion concentration is __.

Q48 The part of an amino acid that gives it its unique property is the

Q49 Amino acids that can be synthesized in the body are called .

Q50 Dextrorotatory molecules are designated by the prefix .

Q51 The prosthetic group in lipoprotein is _.

Q52 All amino acids have in addition to amino group, hydrogen atom and a side chain.

Q53 Which amino acids have polar side chains that are attracted to water? Hydrophilic or hydrophobic? __.

Q54 Tryptophan reacts with formaldehyde reagent in the presence of _, to form a bluish- purple compound

Q55 Amino acid is said to be if it rotates the plane to the right

Q56 Denaturation of a protein changes the primary structure of a protein. True or false?

Q57 The basic distinguishing feature between peptide and protein is in respect to their __.

Q58 The pH of a solution with hydrogen ion concentration of 0.0001 M is __.

Q59 The pH of biological fluids are measured approximately using indicators or more accurately with the aid of __.

Q60 There are main classes of enzymes.

Q61 In a peptide chain residues are numbered from____





Q62 Mention the amino acid that yields a yellow colour when it reacts with Ninhydrin._____





Q63 Polymers composed of few (3-10) amino acids residues are known _____





Q64 Amino acid polymers with molecular weight less than 10,000 are called _____________.





Q65 The following are examples of gel materials except ______





Q66 What is the term for stereoisomers that are mirror images of each other?_______





Q67 An example of an uncommon amino acid that acts as a hormone. _____





Q68 Which of these uncommon amino acids is a precursor of arginine?______





Q69 Calculate the pKa of lactic acid given that at pH 4.8, the concentration of lactic acid and its conjugate base is 0.001 and 0.087 M respectively.______





Q70 Which of these statements is not true of a buffer system?_____





Q71 Which of these is not a peptide found in living systems? ______





Q72 One of these groups plays an important role in Sakaguchi reaction ._____





Q73 Alanine has only one chiral center, how many stereoisomers does it have?_____





Q74 The α-carboxyl group can react with ammonia to yeild one of the following.______





Q75 An example of an amino acid whose side chain is an aliphatic chain terminating in an acidic carboxyl is_______





Q76 One of these amino acids will not give a purple colour with Ninhydrin._____





Q77 What is the function of the gel used in gel filtration? ______





Q78 One of these statements is not true of peptides._______





Q79 Which of these amino acids forms a red precipitate with bromine water?______





Q80 When amino acids react with Ninhydrin all but one of these substances is formed.______





Q81 Which of the following is useful in spectrophotometric measurement of amino acids? _____





Q82 Two cysteine molecules form _________.





Q83 How many functional groups are in a typical amino acid? _____





Q84 One of these amino acids reacts with formaldehyde with sulphuric acid to give a bluish-purple colouration _____





Q85 All but one of these amino acids is optically active.______





Q86 Which of these uncommon amino acids is a constituent of penicillin antibiotics?______





Q87 Which of these amino acids will form red complexes with Million's reagent ?_______





Q88 What is the symbol of Aspartate?______





Q89 Which of these reactions is peculiar to the indole-ring of tryptophan?_______





Q90 Which of these is incorrect?________





Q91 Which class of protein are known as first-class proteins?_______





Q92 When cysteine reacts with iodoacetate, one of the products formed is ________.





Q93 Which of these amino acids will form give a yellow coloration with concentrated nitric acid?_______





Q94 Amino acid polymers with molecular weight greater than 10,000 are called _____________.





Q95 Amino acids that occur in conjugated forms as components of proteins are called _____





Q96 In the presence of a strong acid amino acids react with alkanol to give one of the following______





Q97 ____________ is a transport protein.





Q98 What is the catalyst involved in the xanthoproteic reaction of aromatic ring of phenyl alanine?_____





Q99 The structures of the common amino acids are similar except with respect to their ______





Q100 What is the pH of an acid buffer solution containing 0.1 M sodium ethanoate and 0.1 M ethanoic acid with Pka 4.8? _____





Q101 One of these proteins is involed in low light vision______





Q102 Which of these is a contractile protein?______





Q103 Which of the following not true of enzymes?______





Q104 Which of these is a structural protein?______





Q105 Which of these is a transport protein?_______





Q106 The percentage of Nitrogen usually found in protein is ________





Q107 All proteins are made up of _____ standard amino acids





Q108 One of these is not true of proteins._______





Q109 Which of these statements is not true of proteins?______





Q110 ____________ describes how the chains of the secondary structure interact through the R groups of the amino acid residues





Q111 Which of these is not a simple protein?_____





Q112 Which of these is NOT a monocarboxylic amino acid ?_____





Q113 Which of these is a basic amino acid?______





Q114 Which of these amino acid contain sulphur?_____





Q115 Which of these is not an aromatic amino acid?______





Q116 Which of these is an essential amino acid for humans ______





Q117 Amino acids are considered amphoteric for one of the following reasons.______





Q118 One of these amino acids is a component of a food flavour enhancer.______





Q119 Which of these amino acids is tasteless?_______





Q120 Which of these amino acids has a bitter taste?________