Download BSC 1005 Post-Exam 1 Review

BSC 1005 Post-Exam 1 Review Fall 2011
Introduction to Life Science
BSC 1005
Fall 2011
Post-Exam 1 Review
Name _________________________________________
CRN _________________________________________
Due Date _____Tues, 10/18/11____________________
1.The scientific process involves
a. the acceptance of all hypotheses.
b. the acceptance of only data consistent with the hypothesis.
c. rejection of hypotheses that are inconsistent with experimental results.
d. the acceptance of hypothesis as a fact after subsequent confirmation with
experimental results.
Explanation:____________________________________________________________
______________________________________________________________________
2.What happens to a Nitrogen atom if it looses a proton?
a. it becomes a nitrogen isotope
b. it becomes a nitrogen anion
c. it becomes a nitrogen cation
d. it becomes a carbon ion
Explanation:____________________________________________________________
______________________________________________________________________
3.A hydroxide ion (-OH) has an oxygen atom, a hydrogen atom, and
a. an extra electron.
b. one less electron.
c. an extra proton.
d. an extra neutron.
Explanation:____________________________________________________________
______________________________________________________________________
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BSC 1005 Post-Exam 1 Review Fall 2011
4.A hydrogen ion (H+) is composed of
a. a single electron.
b. a single proton.
c. a proton and an electron.
d. two protons and an electron.
Explanation:____________________________________________________________
______________________________________________________________________
5.The bond formed between column 1 atoms and column 7 atoms of the periodic table.
a. ionic.
b. covalent.
c. hydrogen.
d. polar.
Explanation:____________________________________________________________
______________________________________________________________________
6.Which of the following bonds is the most polar covalent bond?
a. H―O
b. H―N
c. H―C
d. cannot determine from the information provided
Explanation:____________________________________________________________
______________________________________________________________________
7.Potassium(K) has an atomic number of 19 and is located in the first column of the
periodic table. Bromine has an atomic number of 35 and is located in the seventh
column of the periodic table. Given this information, the correct chemical formula for
potassium bromide is:
a. KBr.
b. K2Br.
c. KBr2.
d. K2Br2.
Explanation:____________________________________________________________
______________________________________________________________________
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BSC 1005 Post-Exam 1 Review Fall 2011
8.Which kind of attractive force holds two molecules together?
a. ionic bond
b. hydrogen bond
c. covalent bond
d. sticky bond
Explanation:____________________________________________________________
______________________________________________________________________
9.Which of the following bonds is the most polar covalent bond?
a. H―N
b. H―O
c. H―C
d. cannot determine from the information provided
Explanation:____________________________________________________________
______________________________________________________________________
10.Which of the following is an acid?
a. K2SO4
b. NaOH
c. KOH
d. H2SO4
Explanation:____________________________________________________________
______________________________________________________________________
11.Which of the following molecules contains double bonds.
a. C2H4
b. H2O
c. HCl
d. C3H8
Explanation:____________________________________________________________
______________________________________________________________________
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BSC 1005 Post-Exam 1 Review Fall 2011
12.How many water molecules are produced during the formation of a triglyceride?
a.1
b.3
c.5
d.9
Explanation:____________________________________________________________
______________________________________________________________________
13.Fructose, glucose, and galactose all have the same empirical formula, C6H12O6, yet
these monosaccharides all have different functions. This is possible because these
three molecules are
a.ions.
b.isotopes.
c.isomers.
d.the same molecule with several common names.
Explanation:____________________________________________________________
______________________________________________________________________
14.Which of the following best describes the Primary structure of a protein?
a.The 3-D folding the polypeptide chain
b.Determined by the DNA genetic code
c.Multiple polypeptides coming together
d.Alpha helix
Explanation:____________________________________________________________
______________________________________________________________________
15.Denaturation is the process in which a protein loses its native shape and function
due to a change in its environment. Which of the following levels of protein structure is
lost first as a protein begins to denature?
a.Primary
b.Secondary
c.Tertiary
d.Quaternary
Explanation:____________________________________________________________
______________________________________________________________________
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BSC 1005 Post-Exam 1 Review Fall 2011
16.Which of the following represents a dehydration synthesis reaction
a.C12H22O11 + H2O → 2C6H12O6
b.2C6H12O6 → C12H22O11 + H2O
c.HCl + NaOH → NaCl + H2O
d.C6H12O6 + 6O2 → 6CO2 + 6H2O
Explanation:____________________________________________________________
______________________________________________________________________
17.Which of the following represents a hydrolysis reaction
a.C12H22O11 + H2O → 2C6H12O6
b.2C6H12O6 → C12H22O11 + H2O
c.HCl + NaOH → NaCl + H2O
d.C6H12O6 + 6O2 → 6CO2 + 6H2O
Explanation:____________________________________________________________
______________________________________________________________________
18.Which of the following represents an acid/base reaction
a.C12H22O11 + H2O → 2C6H12O6
b.2C6H12O6 → C12H22O11 + H2O
c.HCl + NaOH → NaCl + H2O
d.C6H12O6 + 6O2 → 6CO2 + 6H2O
Explanation:____________________________________________________________
______________________________________________________________________
19.The most important function for monosaccharides:
a.They form structural molecules
b.They are broken down into simple sugars for energy
c.They are oxidized for energy producing CO2
d.They are a stored form of energy in cells
Explanation:____________________________________________________________
______________________________________________________________________
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BSC 1005 Post-Exam 1 Review Fall 2011
20.DNA is double-stranded. What force holds the two complimentary strands together?
a.hydrogen bonds
b.covalent bonds
c.3’-5’ phosphodiester linkages
d.hydrophobic/hydrophilic interactions
Explanation:____________________________________________________________
______________________________________________________________________
21.DNA’s ability to replicate depends on this property of DNA molecule
a.complementary strands
b.double helical shape
c.the order of the nitrogenous bases
d.antiparallel strands
Explanation:____________________________________________________________
______________________________________________________________________
22.Compared with a pH of 6, a solution of pH 4 has
a. 1/100 of the proton concentration.
b. 2/3 of the proton concentration.
c. 100 times the proton concentration.
d. 1,000 times the proton concentration.
Explanation:____________________________________________________________
______________________________________________________________________
23.List the four classes of organic (biological) molecules:
a.
________________________________________
b.
________________________________________
c.
________________________________________
d.
________________________________________
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BSC 1005 Post-Exam 1 Review Fall 2011
24.Identify the following molecules as one of the following and circle and label the
functional groups on each:
a.Triglyceride
d.Amino acid
b.Saturated fatty acid
e.Phospholipid
c.Unsaturated fatty acid
f.Carbohydrate
A. _____
C. _____
E. _____
B. _____
D. _____
F. _____
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BSC 1005 Post-Exam 1 Review Fall 2011
25.Which of the following graphs represents a buffered acidic solution?
a.
b.
c.
d.
Explanation:____________________________________________________________
______________________________________________________________________
26.Use the periodic table to solve:
Element
Atomic
Symbol
Atomic Number
# of Valence
Electrons
# of electrons
required to fill
valence shell
Carbon
Hydrogen
Oxygen
Nitrogen
Phosphorous
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BSC 1005 Post-Exam 1 Review Fall 2011
27.Circle the all of the peptide bonds:
Explanation:____________________________________________________________
______________________________________________________________________
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