BIO 203 EXAM 1 QUESTIONS &
ANSWERS (RATED A+)
About 25 of the 95 natural elements are known to be essential to life. Which 4 of
these 25 elemts make up approximately 96% - ANSWERE-Carbon, hydrogen,
nitrogen,oxygen
The slight negative charge at on need of the water molecule is attracted to the slight
positive charge of another water molecule. What is this attraction called? -
ANSWERE-hydrogon bond
The following structure not found in prokaryotic cells is unique to eukaryotic cells
A) flagella
B) mitochondria
C) plasma membrane
D) ribosomes
E) cell wall - ANSWERB- mitochondria
When biologists which to provide highly-magnifies three dimensional microscopic
images, the most likely would use
A) scanning ecectron microscopy
B) transmission electron microscopy
C) light microscopy
D) flatbed HP scanner
E) immunofluorescence microscopy - ANSWERA- scanning ecectron microscopy
The concept of "mechanism' gained acceptance when
a) living cells were synthesized in a scientific experiment from simple inorganic
molecules in the presence of an energy source
b) burning of fossil fuels led to CO2 release
C) an increase in bicarbonate les to coral reef destruction
D) acid precipitation was shown to contribute to the decline of some forest
E) none of the above - ANSWERE-none of the above
Which molecule in the figure continue a sulfydryl group? - ANSWERB
, The synthesis of a polypeptide form an amino acid involves the following type of
reactions
A) catabolic reactions
B) exergonic reaction
C) spontaneous reaction
D) dehydration rection
E) none of the above - ANSWERD- hydration reaction
The following amino acid includes a hydroxyl side chain that may become
phosphorylated during cell signaling events
A) phenylalanine
B) aspartic acid
C) threonine
D) all of the above
E) none of the above - ANSWERC- threonine
Which molecule int he figure to the right contains an organic phosphate? -
ANSWERD
Which of the following solutions has the greatest concentration of hydronium ion
[H3O+] - ANSWERD-gastic juice at pH 2
Thalidomide and L-dopa are examples of pharmaceutical drugs that occurs as
Enantiomers. Enantiomers may
A) differ in location of double bonds
B) differ in their electical charge
C)lack an asymetic carbin
D) have identical three- demensional shape
E) have biologicaly inactive isomers - ANSWERE-have biologically inactive isomers
Which of the following is not considered a a critical property of water for life on
earth?
A) moderation of megnetic feild
B) water as a solvant
C) low specific heat capacity
D) A and c
E) none of the above - ANSWERD- A and C
For the experiment described in the figure above, the following molecule was labeled
with a radioactive tracer:
a) proteins
b) lipids
c) RNA
d) carbohydrates
e) None of the above - ANSWERe- none of the above
ANSWERS (RATED A+)
About 25 of the 95 natural elements are known to be essential to life. Which 4 of
these 25 elemts make up approximately 96% - ANSWERE-Carbon, hydrogen,
nitrogen,oxygen
The slight negative charge at on need of the water molecule is attracted to the slight
positive charge of another water molecule. What is this attraction called? -
ANSWERE-hydrogon bond
The following structure not found in prokaryotic cells is unique to eukaryotic cells
A) flagella
B) mitochondria
C) plasma membrane
D) ribosomes
E) cell wall - ANSWERB- mitochondria
When biologists which to provide highly-magnifies three dimensional microscopic
images, the most likely would use
A) scanning ecectron microscopy
B) transmission electron microscopy
C) light microscopy
D) flatbed HP scanner
E) immunofluorescence microscopy - ANSWERA- scanning ecectron microscopy
The concept of "mechanism' gained acceptance when
a) living cells were synthesized in a scientific experiment from simple inorganic
molecules in the presence of an energy source
b) burning of fossil fuels led to CO2 release
C) an increase in bicarbonate les to coral reef destruction
D) acid precipitation was shown to contribute to the decline of some forest
E) none of the above - ANSWERE-none of the above
Which molecule in the figure continue a sulfydryl group? - ANSWERB
, The synthesis of a polypeptide form an amino acid involves the following type of
reactions
A) catabolic reactions
B) exergonic reaction
C) spontaneous reaction
D) dehydration rection
E) none of the above - ANSWERD- hydration reaction
The following amino acid includes a hydroxyl side chain that may become
phosphorylated during cell signaling events
A) phenylalanine
B) aspartic acid
C) threonine
D) all of the above
E) none of the above - ANSWERC- threonine
Which molecule int he figure to the right contains an organic phosphate? -
ANSWERD
Which of the following solutions has the greatest concentration of hydronium ion
[H3O+] - ANSWERD-gastic juice at pH 2
Thalidomide and L-dopa are examples of pharmaceutical drugs that occurs as
Enantiomers. Enantiomers may
A) differ in location of double bonds
B) differ in their electical charge
C)lack an asymetic carbin
D) have identical three- demensional shape
E) have biologicaly inactive isomers - ANSWERE-have biologically inactive isomers
Which of the following is not considered a a critical property of water for life on
earth?
A) moderation of megnetic feild
B) water as a solvant
C) low specific heat capacity
D) A and c
E) none of the above - ANSWERD- A and C
For the experiment described in the figure above, the following molecule was labeled
with a radioactive tracer:
a) proteins
b) lipids
c) RNA
d) carbohydrates
e) None of the above - ANSWERe- none of the above
