BIO 160 EXAM 1 CRYSTAL MCALVIN
QUESTIONS AND ANSWERS WITH
VERIFIED SOLUTIONS 100% CORRECT
A covalent bond is likely to be polar when - correct answer-
one of the atoms sharing electrons is more electronegative than
the other atom
A peptide bond - correct answer- forms the primary
structure of proteins
A small protein (molecular weight = 25,000 daltons) is injected
into a cell and observed in the nucleus a short time later. What
type of transport has taken place? - correct answer- Passive
Transport
About twenty-five of the 92 natural elements are known to be
essential to life. Which 4 of these 25 elements make up
approximately 96 percent of living matter? - correct answer-
carbon, hydrogen, nitrogen, oxygen
,An atom's atomic number is 7. Its valence is most likely - correct
answer- 3 -Two electrons fill the first shell, and 5 go into the
second (valence) shell. The atom needs 3 more electrons to fill
the valence shell.
Atoms with the same number of protons but with different
electrical charges______ - correct answer- Are different ions
By convention, nucleotide sequences are always written from
the _____. - correct answer- 5' end to the 3' end
C4 plants differ from C3 and CAM plants in that C4 plants _____.
- correct answer-
Carbon dioxide (CO2) is released during which of the following
stages of cellular respiration? - correct answer- oxidation of
pyruvate to acetyl CoA and the citric acid cycle
Chlorophylls absorb most light in which colors of the visible
range? - correct answer- blue and red
(light spectrum ROYGBIV)
, Covalent bonds hold atoms together because they - correct
answer- (a) fill shells without giving atoms much charge. &
(b) bring electrons closer to protons.
During the Calvin cycle, carbon dioxide is _____ to drive the
formation of sugars. S - correct answer- reduced
Each water molecule is joined to _____ other water molecules
by ____ bonds. - correct answer- four ... hydrogen
Energy from sunlight can excite electrons, kicking them out of
their orbitals and creating free radicals. Free radicals are highly
reactive atoms or molecules that have unpaired electrons and
degrade and destroy other compounds in their vicinity.
Carotenoids, one of the pigments present in most chloroplasts,
can stabilize these free radicals. This suggests that _____. -
correct answer- carotenoids probably have a protective
function in the cell
How are nucleotides linked together to form a polynucleotide
chain? - correct answer- In DNA and RNA, a phosphodiester
linkage connects the .3' carbon of one nucleotide and the 5'
carbon of another.
QUESTIONS AND ANSWERS WITH
VERIFIED SOLUTIONS 100% CORRECT
A covalent bond is likely to be polar when - correct answer-
one of the atoms sharing electrons is more electronegative than
the other atom
A peptide bond - correct answer- forms the primary
structure of proteins
A small protein (molecular weight = 25,000 daltons) is injected
into a cell and observed in the nucleus a short time later. What
type of transport has taken place? - correct answer- Passive
Transport
About twenty-five of the 92 natural elements are known to be
essential to life. Which 4 of these 25 elements make up
approximately 96 percent of living matter? - correct answer-
carbon, hydrogen, nitrogen, oxygen
,An atom's atomic number is 7. Its valence is most likely - correct
answer- 3 -Two electrons fill the first shell, and 5 go into the
second (valence) shell. The atom needs 3 more electrons to fill
the valence shell.
Atoms with the same number of protons but with different
electrical charges______ - correct answer- Are different ions
By convention, nucleotide sequences are always written from
the _____. - correct answer- 5' end to the 3' end
C4 plants differ from C3 and CAM plants in that C4 plants _____.
- correct answer-
Carbon dioxide (CO2) is released during which of the following
stages of cellular respiration? - correct answer- oxidation of
pyruvate to acetyl CoA and the citric acid cycle
Chlorophylls absorb most light in which colors of the visible
range? - correct answer- blue and red
(light spectrum ROYGBIV)
, Covalent bonds hold atoms together because they - correct
answer- (a) fill shells without giving atoms much charge. &
(b) bring electrons closer to protons.
During the Calvin cycle, carbon dioxide is _____ to drive the
formation of sugars. S - correct answer- reduced
Each water molecule is joined to _____ other water molecules
by ____ bonds. - correct answer- four ... hydrogen
Energy from sunlight can excite electrons, kicking them out of
their orbitals and creating free radicals. Free radicals are highly
reactive atoms or molecules that have unpaired electrons and
degrade and destroy other compounds in their vicinity.
Carotenoids, one of the pigments present in most chloroplasts,
can stabilize these free radicals. This suggests that _____. -
correct answer- carotenoids probably have a protective
function in the cell
How are nucleotides linked together to form a polynucleotide
chain? - correct answer- In DNA and RNA, a phosphodiester
linkage connects the .3' carbon of one nucleotide and the 5'
carbon of another.
