BIO 121 Final Exam Detailed Questions & Verified
Answers | Biology 121 Study Guide |100% Verified
and Updated |Graded A+|Latest Version and Brand
new Version !!!!
Sloths are arboreal (tree-dwelling) creatures so why do they
defecate (poop) on the ground? Which of the following is a
hypothesis based on this question?
A. If sloth defecating behaviors are to facilitate mating, then the
removal of sloth feces will not affect mating success.
B. Sloths defecate in this way in order to attract mates
C. Removal of sloth feces is the best way to answer this question
D. No sloths successfully mated in areas where sloth feces was
removed
E. None of the above
ANS: B. Sloths defecate in this way in order to attract mates
Why do moths, which are active at night, only visit white flowers?
Which of the following is a prediction based on this question?
A. If moth navigation is dictated by sight, then moths will not visit
white flowers that have been painted red.
B. Moths are active at are active at night.
C. Moths navigate by sight and white flowers are easier to see at
night
D. Only 5% of painted flowers were visited by moths.
ANS: A. If moth navigation is dictated by sight, then moths will not
visit white flowers that have been painted red.
The greatest number of species belong to which of the following
taxonomic levels:
, ANS: class mamilla
Which question cannot be answered by the question cannot be
answered by the scientific method?
A. Is eyewitness testimony in criminal proceedings reliable?
B. Does chemical runoff give rise to hermaphrodite fish?
C. Does a child conceived from a sperm donor have the right to know
right to know who the donor was?
D. Does hair that is shaved grow back coarser?
E. Does the vaccine for measles cause autism?
ANS: C. Does a child conceived from a sperm donor have the right to
know right to know who the donor was?
Of the naturally occurring elements in the human body, which
element is most abundant in terms of wet weight (includes water)?
.... dry weight (doesn't include water)?
ANS: oxygen- wet and carbon- dry
You found a fossilized skull of a saber-toothed tiger while kayaking
around the mud flats of Mobile Bay! Subsequent analysis of the skull
showed that the percent concentration of carbon-14 was roughly
12.5% of what is found in a living organism. According to this result,
how long has it been since this tiger was alive? Remember, the half-
life of carbon-14 is 5,730 years.
ANS: 17,190 years
Which of the following contribute to the atomic weight of atoms as
seen on the periodic table?
A. Electron
B. Proton
C. Neutron
D. Protons and Neutrons
E. All of these contribute to atomic weight
ANS: D. Protons and Neutrons
,Which of the following types of chemical bonds rely on the
electrostatic attraction between positive and negative charges?
A. ionic bond
B. hydrogen bonds
C. covalent bonds
D. ionic and hydrogen bonds
E. all of the above
ANS: D. ionic and hydrogen bonds
Recall that a carbon atom has only four electrons in its valence
(outermost) shell. Given this information, what is the MOST likely
structural formula for carbon dioxide (CO2)?
A. O-C-O
B. O=C=O
C. O=C-O
D. O-C=O
ANS: B. O=C=O
Which of the following chemical bonds is unique to nucleic acids?
A. peptide bonds
B. phosphodiester bonds
C. hydrogen bonds
D. ionic bonds
E. glycosidic bonds
ANS: B. phosphodiester bonds
Which of the following is a polysaccharide found in animals?
ANS: glycerol
Which of the following are the basic structural component of all
cellular membranes?
ANS: phospholipids
Examine the DNA molecule shown below with parent strands
separating in preparation for replication and synthesis of new
, daughter strands. Which of the follow is a TRUE statement? (the top
strand is 3 --> 5)
A. The top strand will produce a lagging daughter strand
B. Each original parent strand will be read in the 5' to 3' direction.
C. The new leading daughter strand will begin with: CAACGT
D. New daughter strands are constructed in the 3' to 5' direction (the
opposite direction of their parent strand)
E. None of these answer choices are true statements regarding the
DNA molecule below
ANS: A. The top strand will produce a lagging daughter strand
Put the following enzymes of DNA Replication in the order in which
they are active:
DNA polymerase III
DNA helicase
RNA primase
DNA ligase
DNA polymerase I
ANS:
DNA helicase
DNA polymerase III
RNA primase
DNA polymerase I
DNA ligase
Examine the DNA molecule shown below. If the bottom strand is
transcribed into mRNA (sequence in red box only), which of the
following is the correct mRNA sequence (5' to 3') from that
transcription? (TTAGGCAG)
A. AATCCGTC
B. UUTCCGTC
C. CTGCCTAA
D. CUGCCUAA
E. None of these answer choices are correct
Answers | Biology 121 Study Guide |100% Verified
and Updated |Graded A+|Latest Version and Brand
new Version !!!!
Sloths are arboreal (tree-dwelling) creatures so why do they
defecate (poop) on the ground? Which of the following is a
hypothesis based on this question?
A. If sloth defecating behaviors are to facilitate mating, then the
removal of sloth feces will not affect mating success.
B. Sloths defecate in this way in order to attract mates
C. Removal of sloth feces is the best way to answer this question
D. No sloths successfully mated in areas where sloth feces was
removed
E. None of the above
ANS: B. Sloths defecate in this way in order to attract mates
Why do moths, which are active at night, only visit white flowers?
Which of the following is a prediction based on this question?
A. If moth navigation is dictated by sight, then moths will not visit
white flowers that have been painted red.
B. Moths are active at are active at night.
C. Moths navigate by sight and white flowers are easier to see at
night
D. Only 5% of painted flowers were visited by moths.
ANS: A. If moth navigation is dictated by sight, then moths will not
visit white flowers that have been painted red.
The greatest number of species belong to which of the following
taxonomic levels:
, ANS: class mamilla
Which question cannot be answered by the question cannot be
answered by the scientific method?
A. Is eyewitness testimony in criminal proceedings reliable?
B. Does chemical runoff give rise to hermaphrodite fish?
C. Does a child conceived from a sperm donor have the right to know
right to know who the donor was?
D. Does hair that is shaved grow back coarser?
E. Does the vaccine for measles cause autism?
ANS: C. Does a child conceived from a sperm donor have the right to
know right to know who the donor was?
Of the naturally occurring elements in the human body, which
element is most abundant in terms of wet weight (includes water)?
.... dry weight (doesn't include water)?
ANS: oxygen- wet and carbon- dry
You found a fossilized skull of a saber-toothed tiger while kayaking
around the mud flats of Mobile Bay! Subsequent analysis of the skull
showed that the percent concentration of carbon-14 was roughly
12.5% of what is found in a living organism. According to this result,
how long has it been since this tiger was alive? Remember, the half-
life of carbon-14 is 5,730 years.
ANS: 17,190 years
Which of the following contribute to the atomic weight of atoms as
seen on the periodic table?
A. Electron
B. Proton
C. Neutron
D. Protons and Neutrons
E. All of these contribute to atomic weight
ANS: D. Protons and Neutrons
,Which of the following types of chemical bonds rely on the
electrostatic attraction between positive and negative charges?
A. ionic bond
B. hydrogen bonds
C. covalent bonds
D. ionic and hydrogen bonds
E. all of the above
ANS: D. ionic and hydrogen bonds
Recall that a carbon atom has only four electrons in its valence
(outermost) shell. Given this information, what is the MOST likely
structural formula for carbon dioxide (CO2)?
A. O-C-O
B. O=C=O
C. O=C-O
D. O-C=O
ANS: B. O=C=O
Which of the following chemical bonds is unique to nucleic acids?
A. peptide bonds
B. phosphodiester bonds
C. hydrogen bonds
D. ionic bonds
E. glycosidic bonds
ANS: B. phosphodiester bonds
Which of the following is a polysaccharide found in animals?
ANS: glycerol
Which of the following are the basic structural component of all
cellular membranes?
ANS: phospholipids
Examine the DNA molecule shown below with parent strands
separating in preparation for replication and synthesis of new
, daughter strands. Which of the follow is a TRUE statement? (the top
strand is 3 --> 5)
A. The top strand will produce a lagging daughter strand
B. Each original parent strand will be read in the 5' to 3' direction.
C. The new leading daughter strand will begin with: CAACGT
D. New daughter strands are constructed in the 3' to 5' direction (the
opposite direction of their parent strand)
E. None of these answer choices are true statements regarding the
DNA molecule below
ANS: A. The top strand will produce a lagging daughter strand
Put the following enzymes of DNA Replication in the order in which
they are active:
DNA polymerase III
DNA helicase
RNA primase
DNA ligase
DNA polymerase I
ANS:
DNA helicase
DNA polymerase III
RNA primase
DNA polymerase I
DNA ligase
Examine the DNA molecule shown below. If the bottom strand is
transcribed into mRNA (sequence in red box only), which of the
following is the correct mRNA sequence (5' to 3') from that
transcription? (TTAGGCAG)
A. AATCCGTC
B. UUTCCGTC
C. CTGCCTAA
D. CUGCCUAA
E. None of these answer choices are correct
