EPB (Day 1) Flashcards
Which cannot be heated by microwave radiation in oven base on dipole moment: Beakers with
A. CCl4
B. CO
C. H2O
D. Empty beaker
A. CCl4
Which of the following microorganisms are producers of citric acid?
A. Aspergillus niger (fungi)
B. Yarrowia lipolytica and Candida(yeast)
C. Bacillus licheniformis (bacteria)
D. All of the above.
D. All of the above.
A higher Ks value of Monod equation means
A. greater affinities to substrate
B. lower affinities to substrate
C. lower dissociation constant values
D. Ks value does not mean anything to substrate affinities
A. greater affinities to substrate (indiabix answer)
B. lower affinities to substrate (correct answer)
Determine the amount of H2SO4 that will react with CaCO3 to produce 66 g of CaSO4 (136.15 g/mol).
A. 0.485 mol
B. 0.243 mol
C. 0.970 mol
D. 1.485 mol
A. 0.485 mol
Determine the volume of 0.741 M sulfuric acid needed by 27.0 mL of 0.311 M NaOH to reach the end point.
A. 8.40 mL
B. 5.67 mL
C. 4.19 mL
D. 1.28 mL
B. 5.67 mL
Determine the pH of 0.21 M sodium benzoate solution. pKa of benzoic acid is 4.202.
A. 5.24
B. 5.78
C. 6.87
D. 8.76
D. 8.76
Calculate the amount of Ni (58.69 g/mol) in a 1.201-g sample treated with 48 mL of 1.40x10^-2 g/mL of KCN (65.12 g/mol). The excess cyanide required 0.50 mL of 1.25x10^-2 g/mL of AgNO3 (169.87 g/mol) solution.
A. 50.15%
B. 12.52%
C. 10.25%
D. 7.36%
B. 12.52%
Determine the volume of AgNO3 (169.88 g/mol) solution needed when 5.05 g/L of it is mixed with 25.00 mL of 5.10 g/L of BaCl2 (208.23 g/mol) solution.
A. 41.19 mL
B. 50.20 mL
C. 38.20 mL
D. 45.60 mL
A. 41.19 mL
Given the complex [Co(NH3)4Cl2]+, what are the primary and secondary valences, respectively?
A. 1, 2
B. 1, 6
C. 3, 2
D. 3, 6
D. 3, 6
An organic compound with the molecular formula C3H6O undergoes dehydration with concentrated phosphoric acid. The formed product, X, rapidly decolorizes a solution of bromine in tetrachloromethane. Determine the identity of product X.
A. propanol
B. propane
C. propene
D. propanoic acid
C. propene
Which of the following best describes the graph?
A. exothermic
B. endothermic
C. exergonic
D. endergonic
D. endergonic
Which amino acid is the precursor of the class of neurotransmitters called catecholamines, which includes epinephrine?
A. Alanine
B. Arginine
C. Tyrosine
D. Tryptophan
C. Tyrosine
What is the common characteristic of the amino acids of which the carboxyl groups of the peptide bonds can be hydrolyzed by trypsin?
A. The amino acid residues (Lys and Arg) that are cleaved by trypsin have basic side chains; thus, they are positively charged at physiological pH.
B. The amino acid residues (Asp and Glu) that are cleaved by trypsin have acidic side chains; thus, they are negatively charged at physiological pH.
C. The amino acid residues (Gly and Ala) that are cleaved by trypsin have neutral side chains; thus, they are neutral at physiological pH.
D. None of the above.
A. The amino acid residues (Lys and Arg) that are cleaved by trypsin have basic side chains; thus, they are positively charged at physiological pH.
Which of the following is taurine?
A. none of the answers below
B. 2-aminoethanephenol
C. 2-aminoethanesulfonic acid
D. 2-aminoethanecarboxylic acid
C. 2-aminoethanesulfonic acid
What is the product of the reaction when alpha-amylase acts on amylose?
A. Different-sized oligosaccharide fragments smaller than amylose molecules.
B. Larger-sized oligosaccharide fragments larger than amylose molecules.
C. Rearranged amylose molecules resembling amylopectin.
D. No reaction will occur.
A. Different-sized oligosaccharide fragments smaller than amylose molecules.
