BIOL-K101 FINAL EXAM 2024/2025 WITH 100% ACCURATE SOLUTIONS
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Course
BIOL-K101
Institution
BIOL-K101
BIOL-K101 FINAL EXAM 2024/2025 WITH 100% ACCURATE SOLUTIONS
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BIOL-K101 FINAL EXAM 2024/2025 WITH
100% ACCURATE SOLUTIONS
In a single molecule of water, the two hydrogen atoms are bonded to a
single oxygen atom by
a. polar covalent bonds
b. ionic bonds
c. hydrogen bonds
d. nonpolar covalent bonds - Precise Answer ✔✔a. polar covalent bonds
Stanley Miller's 1953 experiment demonstrated conclusively that
a. life arose on Earth from simple organic molecules, with energy from
lightning and volcanoes
b. the conditions on early Earth were conducive to the origin of life.
c. life arose on Earth 3.8 billion years ago from simple organic
molecules
d. organic molecules can be synthesized abiotically under conditions that
may have existed on early Earth.
e. the conditions on early Earth were conducive to the abiotic synthesis
of organic molecules. - Precise Answer ✔✔d. organic molecules can be
synthesized abioticallly under conditions that may have existed on early
Earth.
,What do the four 'elements of life' -carbon, oxygen, hydrogen, and
nitrogen-have in common?
a. they are equal in electronegativity
b. they are elements produced only by living cells
c. they all have the same number of valence electrons
d. each element exists in only one isotopic form
e. they all have unpaired electrons in their valence shells - Precise
Answer ✔✔e. they all have unpaired electrons in their valence shells
Using the functional group diagram at right answer A-E which of the
following is incorrectly match?:
a. A = amino group
b. B = thiol group
c. C = carbonyl group
d. D = organic phosphate
e. E = carboxyl - Precise Answer ✔✔e. E = carboxyl
Water is able to form hydrogen bonds because
a. the oxygen atom in a water molecule has a weak positive charge
,b. each of the hydrogen atoms in a water molecule is weakly negative in
charge
c. oxygen has a valence of two
d. the water molecule is shaped like a tetrahedron
e. the bonds that hold together the atoms in a water molecule are polar
covalent bonds. - Precise Answer ✔✔e. the bonds that hold together the
atoms in a water molecule are polar covalent bonds
Which functional group shown at the right is:
i) is an acidic function group that can release H+ into a solution - Precise
Answer ✔✔C. carboxyl
Which functional group shown at the right is:
ii) a basic functional group that can accept H+ - Precise Answer ✔✔D.
amine
Which functional group shown at the right is:
iii) can exist as a ketone or aldehyde configuration - Precise Answer
✔✔B. carbonyl
Which functional group shown at the right is:
, iv) a characteristic of alcohols - Precise Answer ✔✔a. hydroxyl
Which functional group shown at the right is:
v) helps stabilize proteins by forming covalent cross-links within or
between protein molecules - Precise Answer ✔✔e. sulfhydryl
Which modifications of fatty acids will best keep triglycerides solid at
warmer temperatures?
a. adding hydrogens and trans double bonds to the fatty acids
b. adding cis double bonds and trans double bonds to the fatty acids
c. creating cis double bonds to the fatty acids
d. adding hydrogens to the fatty acids
e. creating trans double bonds to the fatty acids - Precise Answer ✔✔d.
adding hydrogens to the fatty acids
A comparison of saturated and natrually occurring unsaturated fats
reveals that the unsaturated fats are ________ at room temperature and
have ________:
a. solids; cis double bonds
b. liquids; trans double bonds
c. liquids; single bonds
d. liquids; cis double bonds
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