1022_4th Exam_1030618(A)
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
1) What is between the two strands of DNA, holding them together?
A) ionic bonds B) hydrogen bonds C) dipole-dipole bonds D) covalent bonds
E) London dispersion forces Answer: B
2) Identify the common radiotracers used in the diagnosis of medical problems A) iron-59
B) thallium-201 C) iodine-131 D) fluorine-18
E) all of the above Answer: E
3) Identify the sugar in DNA.
A) galactose B) fructose C) deoxyribose D) glucose E) ribose
Answer: C
4) Which of the following compounds is an ester?
A)
B)
C)
D)
E)
Answer: E
5) Name the following compound.
A) 4-propyl-4-methylpentane B) 4,4-dimethylheptane C) 4-methyl-4-propylpentane D) 2-methyl-2-propylpentane
E) nonane Answer: B
6)Give the product for the dehydration of CH3CH2CH2OH.
A)CH3CH=CH2 B)CH3CH=CHCH3
C)CH3CH2CH2OCH2CH2CH3 D)CH2=C=CH2
E)CH3CH2CH=CH2 Answer: A
7) Which of the following statements is TRUE?
A) Beta decay occurs when a neutron changes into a proton while emitting an electron.
B) An alpha particle is a helium 2+ ion.
C) Positrons are similar in ionizing power and penetrating power to beta particles.
D) A positron is the antiparticle of the electron.
E) All of the above are true.
Answer: E
8) Determine the identity of the daughter nuclide from the alpha decay of 22488 Ra.
A) 22589 Ac B) 22387 Fr C) 22890 Th D) 22086 Rn E) 22284 Po Answer: D
9) Which of the following compounds exhibits optical isomerism?
A)CH3-CH2-CH2F B)CH3-CH2-CH3 C)CH3-CH2-CBr2-CH3 D)CH3-CHBr-CH3
E)CH3-CH2-CHF-CH3 Answer: E
10) Complete and balance the following addition reaction.
CH3C CCH3 + 2 Cl2 ? A)CH3C CCH3 + 2 Cl2 4 CH3Cl
B)CH3C CCH3 + 2 Cl2 CH3CCl2CCl2CH3 C)CH3C CCH3 + Cl2 CH3CHClCHClCH3 D)CH3C CCH3 + 4 Cl2 4 CH2Cl2
E)CH3C CCH3 + 3 Cl2 2 CH3CCl3 Answer: B
11) Which of the following describes a primary protein structure?
A) arrangement of multiple protein subunits
B) protein structure maintained by disulfide linkages
C) protein chains maintained by interactions of peptide backbones D) amino acid sequence maintained by peptide bonds
E) protein structure maintained through multiple hydrogen bonds Answer: D
12) Which of the following statements is TRUE?
A) If N/Z ratio is too high, there are too many protons and the nuclide will undergo positron emission or electron capture.
B) If N/Z ratio is too low, there are too many neutrons and the nuclide will undergo beta decay.
C) If N/Z ratio lies somewhere below 1, the nuclide is stable.
D) The valley of stability is the geographic location where many of the known nuclides were first discovered.
E) None of the above are true.
Answer: E
13) Determine the binding energy per nucleon of an Mg-24 nucleus. The Mg-24 nucleus has a mass of 23.98504. A proton has a mass of 1.00728 amu, a neutron has a mass of 1.008665 amu, and 1 amu is equivalent to 931 MeV of energy.
A) 0.113 MeV B) 106 MeV C) 0.3050 MeV D) 8.00 MeV E) 4.43 MeV
Answer: D
14) Which of the following compounds exhibit geometric isomerism?
A)CH2=CCl2 B)CH2=CH2 C)CBr2=CHBr D)(CH3)2C=CH-CH3
E) CHCl=CHCl Answer: E
15) The age of an ancient tree trunk is estimated using radiocarbon dating. If the trunk has a C-14 decay rate that is 34% of what it is in living plants, how old is the trunk? The half-life of C-14 is 5730 years.
A) 1.94 × 104 years B) 8.92 × 103 years C) 5.31 × 103 years D) 1.74 × 102 years E) 2.92 × 104 years Answer: B
16) Which of the following nuclides are most likely to decay via beta decay?
A) Na-20 B) Al-24 C) N-13 D) I-126 E) Cs-137
Answer: E
17) What type of lipid is the following compound?
A) glycolipid B) fatty acid C) steroid D) triglyceride
E) phospholipid Answer: C
18) Determine the product(s) of the reduction of the following compound:
A)
B)
C)
D) E)
Answer: A
19) Identify the lowest natural radiation.
A) terrestrial radiation B) radon gas
C) cosmic radiation from outer space D) natural radionuclides in the body
E) a five-hour jet airplane ride Answer: E
20) Choose the monosaccharide from the compounds below.
A)
B)
C)
D)
E)
Answer: D
21) Choose the polyunsaturated fatty acid from the compounds below.
A) B)
C)
D) E)
Answer: C
22) Calculate the mass defect in Fe-56 if the mass of an Fe-56 nucleus is 55.921 amu. The mass of a proton is 1.00728 amu and the mass of a neutron is 1.008665 amu.
A) 0.564 amu B) 0.528 amu C) 0.079 amu D) 1.056 amu E) 3.507 amu
Answer: B
23) Identify an alpha particle.
A) 10n B) 0-1e C) 42He D) 0+1e E) 00
Answer: C
24) Which of the following statements is TRUE?
A) A chromosome is a structure within a cell nucleus that houses DNA.
B) Every nucleotide in DNA has the same sugar, but each nucleotide has just one of four different bases.
C) A codon is a sequence of 3 bases that codes for a single amino acid.
D) A nucleotide is composed of a sugar, a base and a phosphate group.
E) All of the above are true.
Answer: E
25) Identify the formula for an alkene.
A)CnH2n+2 B)CnH2n-4 C)CnH2n+4 D)CnH2n-2 E)CnH2n
Answer: E
26) Choose the saturated triglyceride from the compounds below.
A)
B)
C)
D) E)
Answer: A
27) How many of the carbons in the following compound are chiral center(s)?
A) 2 B) 1 C) 4 or more D) 3 E) 0
Answer: A
28) Identify the symptom that is not from radiation exposure.
A) weaker immune systems B) genetic effects
C) death
D) increased cancer risk E) measles
Answer: E
29) Arrange the following in order from most oxidized to least oxidized.
A) I > II > III B) II > I > III C) II > I > III D) III > I > III E) III > II > I Answer: E
30) Molecules with the same formula but different structures are called ________.
A) achiral B) enantiomers C) diastereomers D) structural isomers
E) racemic mixture Answer: D
31) What type of lipid is the following compound?
A) steroid B) glycolipid C) phospholipid D) fatty acid
E) triglyceride Answer: C
32) Nonsuperimposable mirror images are called ________.
A) racemic mixture B) diastereomers C) achiral
D) structural isomers E) enantiomers Answer: E
33) Determine the products of the following reaction:
Benzene + CH3CH2Cl AlCl3 ? A)1,4-diethylbenzene and Cl2
B)trichlorobenzene and CH3CH3 C)1,2-dimethylbenzene and Cl2 D) ethylbenzene and HCl
E)dichlorobenzene and CH3CH2Cl Answer: D
34) Which of the following represent the addition polymer formed from the compound below?
CH2=CH-CH3 A)
B)
C) D) E)
Answer: B
35) Type I diabetes develops when the pancreas does not make enough ________.
A) insulin B) sucrose C) iron D) blood E) cholesterol
Answer: A
36) Determine the products of the following reaction:
A)
B)
C)
D)
E)
Answer: C
37) Identify the instrument(s) used to detect radiation.
A) Geiger-Muller counter B) scintillation counter C) film-badge dosimeter D) all of the above
E) none of the above Answer: D
38) Write a nuclear equation for the alpha decay of 23892 U.
A) 23892 U 0
+1e + 23891 Pa B) 23892 U 0
-1e + 23893 Np C) 23892 U 0
-1e + 23891 Pa D) 23892 U 4
2He + 23490 Th E) 23892 U 1
0n + 23792 U Answer: D
39) Name the following compound.
A) p-bromobenzene B) m-dibromobenzene C) o-dibromobenzene D) p-dibromobenzene E) none of the above Answer: D
40) Which of the following compounds is an aldehyde?
A)CH3-O-CH3 B)CH3CH2CH=O C)CH3CH2CH2CO2H D)CH3CO2CH3
E)CH2OH-CH2OH Answer: B
