BIO CHEM FINAL EXAM LATEST QUESTIONS
AND CORRECT DETAILED ANSWERS WITH
RATIONALES (VERIFIED ANSWERS) 2025/2026
|ALREADY GRADED A+
Which statement is NOT true about polar covalent bonds?
A. When covalent bonds are nonpolar, the electrons are shared fairly
equally between the atoms.
B. Electrons are shared unequally in a polar covalent bond.
C. The larger atom in a polar bond attracts the electron more strongly than
the smaller atom
D. Polar covalent bonds are important in the characteristics of water.
E. The oxygen of a water molecule is electropositive relative to the
hydrogen --PRECISE ANS--E
The expected outcome of an experiment is
known as A. a scientific theory or principle.
B. experimental
results. C. a
prediction.
D. a scientific model.an experiment. --PRECISE ANS--D
A triglyceride is a polymer made up of which kind of subunits?
A. amino
acids B.
nucleotides
C. glucose or modified glucose
molecules D. alternating sugar and
phosphate groups E. fatty acids and
glycerol --PRECISE ANS--E
You are interested in the effect of increased carbon dioxide versus normal air
on the growth of corn plants as well as the effect of green light versus full
sunlight on the growth of corn plants. Your plan is to set up your experiment
inside a greenhouse where you can control the environment. Which of the
following is an aspect of the experiment that should be considered and
controlled?
A. An increase in carbon dioxide should not result in a substantial
decrease of other necessary gases.
B. All seedlings come from one uniform strain.
C. The intensity or brightness of the green light equals the intensity of the
full sunlight. D. All temperatures and available water remain the same for
all plants.
,E. All of the choices are important considerations. --PRECISE ANS--E
Which listing correctly indicates a sequence of increasing biological
organization?
,A. molecule, cell, organelle,
atom B. atom, molecule,
organelle, cell C. organ, tissue,
atom, molecule
D. organelle, tissue, cell, molecule --PRECISE
ANS--B Which statement is true about RNA?
A. One of the bases from DNA is replaced by
uracil. B. It is a double-stranded molecule.
C. It contains adenine paired to
thymine. D. It contains the sugar
deoxyribose.
E. Its nucleotides contain twice as many phosphate groups as DNA's
nucleotides. --PRECISE ANS--A
A carbon atom can form up to three single covalent bonds with other atoms.
True or False --PRECISE ANS--False
How many atoms are required to form a molecule?
A. at least
two B. only
one C. at
least five D.
at least four
E. at least three --PRECISE ANS--A
What is the maximum number of electrons that will be in the first valence
shell?
A.
three
B. two
C.
eight
D. six
E. one --PRECISE ANS--B
An atom's atomic mass is best described as the mass of
A. protons and electrons it
contains. B. the neutrons it
contains.
C. the protons it contains.
D. protons and neutrons it contains.
E. electrons in the outermost shell. --PRECISE ANS--D
, Which of the following organisms are ultimately dependent on the sun as a
source of energy?
AND CORRECT DETAILED ANSWERS WITH
RATIONALES (VERIFIED ANSWERS) 2025/2026
|ALREADY GRADED A+
Which statement is NOT true about polar covalent bonds?
A. When covalent bonds are nonpolar, the electrons are shared fairly
equally between the atoms.
B. Electrons are shared unequally in a polar covalent bond.
C. The larger atom in a polar bond attracts the electron more strongly than
the smaller atom
D. Polar covalent bonds are important in the characteristics of water.
E. The oxygen of a water molecule is electropositive relative to the
hydrogen --PRECISE ANS--E
The expected outcome of an experiment is
known as A. a scientific theory or principle.
B. experimental
results. C. a
prediction.
D. a scientific model.an experiment. --PRECISE ANS--D
A triglyceride is a polymer made up of which kind of subunits?
A. amino
acids B.
nucleotides
C. glucose or modified glucose
molecules D. alternating sugar and
phosphate groups E. fatty acids and
glycerol --PRECISE ANS--E
You are interested in the effect of increased carbon dioxide versus normal air
on the growth of corn plants as well as the effect of green light versus full
sunlight on the growth of corn plants. Your plan is to set up your experiment
inside a greenhouse where you can control the environment. Which of the
following is an aspect of the experiment that should be considered and
controlled?
A. An increase in carbon dioxide should not result in a substantial
decrease of other necessary gases.
B. All seedlings come from one uniform strain.
C. The intensity or brightness of the green light equals the intensity of the
full sunlight. D. All temperatures and available water remain the same for
all plants.
,E. All of the choices are important considerations. --PRECISE ANS--E
Which listing correctly indicates a sequence of increasing biological
organization?
,A. molecule, cell, organelle,
atom B. atom, molecule,
organelle, cell C. organ, tissue,
atom, molecule
D. organelle, tissue, cell, molecule --PRECISE
ANS--B Which statement is true about RNA?
A. One of the bases from DNA is replaced by
uracil. B. It is a double-stranded molecule.
C. It contains adenine paired to
thymine. D. It contains the sugar
deoxyribose.
E. Its nucleotides contain twice as many phosphate groups as DNA's
nucleotides. --PRECISE ANS--A
A carbon atom can form up to three single covalent bonds with other atoms.
True or False --PRECISE ANS--False
How many atoms are required to form a molecule?
A. at least
two B. only
one C. at
least five D.
at least four
E. at least three --PRECISE ANS--A
What is the maximum number of electrons that will be in the first valence
shell?
A.
three
B. two
C.
eight
D. six
E. one --PRECISE ANS--B
An atom's atomic mass is best described as the mass of
A. protons and electrons it
contains. B. the neutrons it
contains.
C. the protons it contains.
D. protons and neutrons it contains.
E. electrons in the outermost shell. --PRECISE ANS--D
, Which of the following organisms are ultimately dependent on the sun as a
source of energy?
