Biology 101 Final Exam ( 4 Versions) Questions
And Answers 2025
. In some experiments, several identical groups are set up, keeping conditions
similar among them. In the ______ group, a change is deliberately introduced. In
the ______ group, this change is not introduced. In this way, the researcher cna
determine if the change has an effect.
A. control; experimental
B. experimental; control
C. dependent variable; independent variable
D. independent variable; dependent variable - ANSWER-B
. Select the choice that makes the following statement true. The head of a fatty
acid is _______ and would form the _______ of a cell membrane; the tail is
______ and would form the ______ of a cell membrane.
A. hydrophobic; interior; hydrophilic; surface
B. hydrophilic; surface; hydrophobic; surface
C. hydrophilic; interior; hydrophobic; interior
D. hydrophilic; surface; hydrophobic; interior
E. hydrophobic; surface; hydrophilic; interior - ANSWER-D
. For an atom that is NOT an ion, which of the following must be true?
A. the number of electrons equals the number of protons
,B. the number of electrons equals the sum of the number of protons and the
number of neutrons
C. the number of electrons equals the number of neutrons
D. the number of protons equals the number of neutrons - ANSWER-A
1. The following amino acids all belong to one class. What class is it? Arginine, Histidine, Lysine.
A. Non-polar
B. Uncharged Polar
C. Special cases
D. Charged polar - ANSWER-D
2. Which of the following is not part of the scientific method?
A. observation
B. prediction
C. hypothesis
D. experimentation
E. assumption - ANSWER-E
3. A single strand of DNA has:
A. a 3' end, which consists of a carbon attached to a phosphate group, and a 5' end, which
consists of a carbon attached to a hydroxyl group.
B. a 5' end, which consists of a carbon attached to a phosphate group, and a 3' end, which
consists of a carbon attached to a hydroxyl group.
C. two 5' ends, each which consists of a carbon attached to a hydroxyl group
D. two 3' ends, each of which consists of a carbon attached to a phosphate group
,E. neither 5' or 3' ends, as these terms only refer to the ends of double-stranded DNA -
ANSWER-B
4. In the scientific method, hypotheses lead MOST directly to:
A. observations
B. predictions
C. experiments
D. theories
E. conclusions - ANSWER-B
11. Refer to the periodic table, and decide which one of the following is a polar covalent bond.
A. N-H
B. C-H
C. Na-Cl
D. O-O - ANSWER-A
12. Nitrogen and phosphorus are in the same column of the periodic table. They have similar
properties in bonding with other molecules because they have the same number of:
A. paired electrons
B. electron shells
C. valence electrons
D. electrons - ANSWER-C
13. Select the element that would be found in LEAST abundance in a living cell.
A. carbon
B. hydrogen
C. phosphorous
, D. silicon
E. nitrogen - ANSWER-D
14. The three of the four families of cellular macromolecules are polymerized and
depolymerized by a general mechanism involving water. Which of the following statements is
true regarding these mechanisms
A. each depolymerization step requires energy input and proceeds by the release of one water
molecule
B. each depolymerization step requires energy input and proceeds by the use of one water
molecule
C. each polymerization step requires energy input and proceeds by the use of one water
molecule
D. each polymerization step requires energy input and proceeds by the release of one water
molecule - ANSWER-D
15. Of the following types of bonds between atoms, which is the STRONGEST?
A. covalent bond
B. van der Waals fources
C. ionic bond
D. hydrogen bond - ANSWER-A
16. Several chemical properties make water uniquely suited for its role as a central "molecule of
life." Which of the following is false?
A. water molecules are always polar
B. As water is heated, hydrogen bonds between water molecules must be broken before the
temperature increases
C. The structure of a water molecule is stabilized by hydrogen bonds
D. Ice is ligher and floats on water because it is a crystalline structure in which each water
molecule is bonded to four other water molecules
And Answers 2025
. In some experiments, several identical groups are set up, keeping conditions
similar among them. In the ______ group, a change is deliberately introduced. In
the ______ group, this change is not introduced. In this way, the researcher cna
determine if the change has an effect.
A. control; experimental
B. experimental; control
C. dependent variable; independent variable
D. independent variable; dependent variable - ANSWER-B
. Select the choice that makes the following statement true. The head of a fatty
acid is _______ and would form the _______ of a cell membrane; the tail is
______ and would form the ______ of a cell membrane.
A. hydrophobic; interior; hydrophilic; surface
B. hydrophilic; surface; hydrophobic; surface
C. hydrophilic; interior; hydrophobic; interior
D. hydrophilic; surface; hydrophobic; interior
E. hydrophobic; surface; hydrophilic; interior - ANSWER-D
. For an atom that is NOT an ion, which of the following must be true?
A. the number of electrons equals the number of protons
,B. the number of electrons equals the sum of the number of protons and the
number of neutrons
C. the number of electrons equals the number of neutrons
D. the number of protons equals the number of neutrons - ANSWER-A
1. The following amino acids all belong to one class. What class is it? Arginine, Histidine, Lysine.
A. Non-polar
B. Uncharged Polar
C. Special cases
D. Charged polar - ANSWER-D
2. Which of the following is not part of the scientific method?
A. observation
B. prediction
C. hypothesis
D. experimentation
E. assumption - ANSWER-E
3. A single strand of DNA has:
A. a 3' end, which consists of a carbon attached to a phosphate group, and a 5' end, which
consists of a carbon attached to a hydroxyl group.
B. a 5' end, which consists of a carbon attached to a phosphate group, and a 3' end, which
consists of a carbon attached to a hydroxyl group.
C. two 5' ends, each which consists of a carbon attached to a hydroxyl group
D. two 3' ends, each of which consists of a carbon attached to a phosphate group
,E. neither 5' or 3' ends, as these terms only refer to the ends of double-stranded DNA -
ANSWER-B
4. In the scientific method, hypotheses lead MOST directly to:
A. observations
B. predictions
C. experiments
D. theories
E. conclusions - ANSWER-B
11. Refer to the periodic table, and decide which one of the following is a polar covalent bond.
A. N-H
B. C-H
C. Na-Cl
D. O-O - ANSWER-A
12. Nitrogen and phosphorus are in the same column of the periodic table. They have similar
properties in bonding with other molecules because they have the same number of:
A. paired electrons
B. electron shells
C. valence electrons
D. electrons - ANSWER-C
13. Select the element that would be found in LEAST abundance in a living cell.
A. carbon
B. hydrogen
C. phosphorous
, D. silicon
E. nitrogen - ANSWER-D
14. The three of the four families of cellular macromolecules are polymerized and
depolymerized by a general mechanism involving water. Which of the following statements is
true regarding these mechanisms
A. each depolymerization step requires energy input and proceeds by the release of one water
molecule
B. each depolymerization step requires energy input and proceeds by the use of one water
molecule
C. each polymerization step requires energy input and proceeds by the use of one water
molecule
D. each polymerization step requires energy input and proceeds by the release of one water
molecule - ANSWER-D
15. Of the following types of bonds between atoms, which is the STRONGEST?
A. covalent bond
B. van der Waals fources
C. ionic bond
D. hydrogen bond - ANSWER-A
16. Several chemical properties make water uniquely suited for its role as a central "molecule of
life." Which of the following is false?
A. water molecules are always polar
B. As water is heated, hydrogen bonds between water molecules must be broken before the
temperature increases
C. The structure of a water molecule is stabilized by hydrogen bonds
D. Ice is ligher and floats on water because it is a crystalline structure in which each water
molecule is bonded to four other water molecules
