1
BIOL 1009 - MIDTERM EXAM 1 LATEST
2026/2027 | 50 VERIFIED Q&A | DETAILED
RATIONALES | NGN-ALIGNED | PASS
GUARANTEED – A+ GRADED
SECTION I: SCIENTIFIC METHOD AND BIOLOGICAL CHEMISTRY - Questions 1-10
Q1: Scientific method steps
The student is reviewing the scientific method. Which step involves forming a testable prediction
based on observations?
A. Observation
B. Hypothesis
C. Experiment
D. Conclusion
Correct Answer: B
Rationale: A hypothesis is a testable prediction or proposed explanation based on observations. It
must be falsifiable through experimentation. Observations lead to questions, experiments test
hypotheses, and conclusions are drawn from results. [100% CORRECT]
Q2: Characteristics of living things
The student is reviewing characteristics of life. Which characteristic is shared by all living organisms?
A. Ability to photosynthesize
B. Ability to reproduce
C. Ability to move
D. Ability to breathe
Correct Answer: B
Rationale: All living organisms share several characteristics including organization, metabolism,
growth, adaptation, response to stimuli, homeostasis, and reproduction. Not all organisms
photosynthesize, move, or breathe (e.g., plants do not breathe, some bacteria do not move). [100%
CORRECT]
Q3: Atomic structure
The student is reviewing atomic structure. Which subatomic particle determines the atomic number
of an element?
A. Neutron
B. Electron
, 2
C. Proton
D. Nucleus
Correct Answer: C
Rationale: The atomic number is determined by the number of protons in the nucleus. Neutrons
contribute to atomic mass but not atomic number. Electrons orbit the nucleus and determine
chemical properties. [100% CORRECT]
Q4: Chemical bonds
The student is reviewing chemical bonds. Which type of bond involves the sharing of electrons
between atoms?
A. Ionic bond
B. Covalent bond
C. Hydrogen bond
D. Van der Waals interaction
Correct Answer: B
Rationale: Covalent bonds involve the sharing of electron pairs between atoms. Ionic bonds involve
transfer of electrons. Hydrogen bonds are weak attractions between polar molecules. Van der Waals
interactions are weak, temporary attractions. [100% CORRECT]
Q5: Water properties
The student is reviewing water properties. Which property of water allows it to dissolve many
substances?
A. High specific heat
B. Polarity
C. Cohesion
D. Low density as a solid
Correct Answer: B
Rationale: Water is a polar molecule, meaning it has partial positive and negative charges. This
polarity allows water to dissolve other polar and ionic substances, making it an excellent solvent.
[100% CORRECT]
Q6: pH scale
The student is reviewing the pH scale. A solution with a pH of 3 is:
A. Neutral
B. Acidic
C. Basic
D. Alkaline
Correct Answer: B
Rationale: The pH scale ranges from 0 to 14. A pH below 7 is acidic, pH of 7 is neutral, and pH above
7 is basic/alkaline. A pH of 3 is acidic. [100% CORRECT]
BIOL 1009 - MIDTERM EXAM 1 LATEST
2026/2027 | 50 VERIFIED Q&A | DETAILED
RATIONALES | NGN-ALIGNED | PASS
GUARANTEED – A+ GRADED
SECTION I: SCIENTIFIC METHOD AND BIOLOGICAL CHEMISTRY - Questions 1-10
Q1: Scientific method steps
The student is reviewing the scientific method. Which step involves forming a testable prediction
based on observations?
A. Observation
B. Hypothesis
C. Experiment
D. Conclusion
Correct Answer: B
Rationale: A hypothesis is a testable prediction or proposed explanation based on observations. It
must be falsifiable through experimentation. Observations lead to questions, experiments test
hypotheses, and conclusions are drawn from results. [100% CORRECT]
Q2: Characteristics of living things
The student is reviewing characteristics of life. Which characteristic is shared by all living organisms?
A. Ability to photosynthesize
B. Ability to reproduce
C. Ability to move
D. Ability to breathe
Correct Answer: B
Rationale: All living organisms share several characteristics including organization, metabolism,
growth, adaptation, response to stimuli, homeostasis, and reproduction. Not all organisms
photosynthesize, move, or breathe (e.g., plants do not breathe, some bacteria do not move). [100%
CORRECT]
Q3: Atomic structure
The student is reviewing atomic structure. Which subatomic particle determines the atomic number
of an element?
A. Neutron
B. Electron
, 2
C. Proton
D. Nucleus
Correct Answer: C
Rationale: The atomic number is determined by the number of protons in the nucleus. Neutrons
contribute to atomic mass but not atomic number. Electrons orbit the nucleus and determine
chemical properties. [100% CORRECT]
Q4: Chemical bonds
The student is reviewing chemical bonds. Which type of bond involves the sharing of electrons
between atoms?
A. Ionic bond
B. Covalent bond
C. Hydrogen bond
D. Van der Waals interaction
Correct Answer: B
Rationale: Covalent bonds involve the sharing of electron pairs between atoms. Ionic bonds involve
transfer of electrons. Hydrogen bonds are weak attractions between polar molecules. Van der Waals
interactions are weak, temporary attractions. [100% CORRECT]
Q5: Water properties
The student is reviewing water properties. Which property of water allows it to dissolve many
substances?
A. High specific heat
B. Polarity
C. Cohesion
D. Low density as a solid
Correct Answer: B
Rationale: Water is a polar molecule, meaning it has partial positive and negative charges. This
polarity allows water to dissolve other polar and ionic substances, making it an excellent solvent.
[100% CORRECT]
Q6: pH scale
The student is reviewing the pH scale. A solution with a pH of 3 is:
A. Neutral
B. Acidic
C. Basic
D. Alkaline
Correct Answer: B
Rationale: The pH scale ranges from 0 to 14. A pH below 7 is acidic, pH of 7 is neutral, and pH above
7 is basic/alkaline. A pH of 3 is acidic. [100% CORRECT]
