BIOL 1001 UMN Exam 1 questions
with correct answers
Course
Biol 1001
1. Which characteristic is shared by all living organisms?
A. Photosynthesis
B. Multicellularity
C. Ability to maintain homeostasis
D. Ability to move
Answer:
C. Ability to maintain homeostasis
Explanation:
Homeostasis is the regulation of a stable internal environment despite external changes and is a
defining characteristic of life.
2. What is the smallest unit capable of carrying out all life processes?
A. Atom
B. Tissue
C. Cell
D. Organ
Answer:
C. Cell
Explanation:
The cell is the basic structural and functional unit of all living organisms.
3. Which step comes first in the scientific method?
A. Analyze data
B. Form a hypothesis
C. Make observations and ask a question
D. Draw conclusions
,Answer:
C. Make observations and ask a question
Explanation:
Scientific investigations begin with careful observations that lead to questions.
4. What is a hypothesis?
Answer:
A testable and falsifiable explanation for an observation or scientific question.
Explanation:
A hypothesis predicts what will happen under specific conditions and can be tested
experimentally.
5. Which statement best describes a scientific theory?
A. An untested guess
B. A proven fact
C. A well-supported explanation based on extensive evidence
D. A personal opinion
Answer:
C. A well-supported explanation based on extensive evidence
Explanation:
Scientific theories explain natural phenomena and are supported by repeated experimentation.
6. Which subatomic particle has a positive charge?
A. Electron
B. Neutron
C. Proton
D. Photon
Answer:
C. Proton
Explanation:
Protons carry a positive charge and are found in the nucleus of an atom.
, 7. Which bond forms when atoms share electrons?
A. Ionic bond
B. Covalent bond
C. Hydrogen bond
D. Metallic bond
Answer:
B. Covalent bond
Explanation:
Covalent bonds involve the sharing of electron pairs between atoms.
8. Water is considered a polar molecule because:
A. It has no electrons.
B. Oxygen attracts electrons more strongly than hydrogen.
C. Hydrogen has a positive charge only.
D. Water contains ionic bonds.
Answer:
B. Oxygen attracts electrons more strongly than hydrogen.
Explanation:
This unequal sharing of electrons creates partial charges within the molecule.
9. Which property of water helps insects walk across its surface?
A. High heat capacity
B. Surface tension
C. Adhesion
D. Solubility
Answer:
B. Surface tension
Explanation:
Hydrogen bonding between water molecules creates strong surface tension.
with correct answers
Course
Biol 1001
1. Which characteristic is shared by all living organisms?
A. Photosynthesis
B. Multicellularity
C. Ability to maintain homeostasis
D. Ability to move
Answer:
C. Ability to maintain homeostasis
Explanation:
Homeostasis is the regulation of a stable internal environment despite external changes and is a
defining characteristic of life.
2. What is the smallest unit capable of carrying out all life processes?
A. Atom
B. Tissue
C. Cell
D. Organ
Answer:
C. Cell
Explanation:
The cell is the basic structural and functional unit of all living organisms.
3. Which step comes first in the scientific method?
A. Analyze data
B. Form a hypothesis
C. Make observations and ask a question
D. Draw conclusions
,Answer:
C. Make observations and ask a question
Explanation:
Scientific investigations begin with careful observations that lead to questions.
4. What is a hypothesis?
Answer:
A testable and falsifiable explanation for an observation or scientific question.
Explanation:
A hypothesis predicts what will happen under specific conditions and can be tested
experimentally.
5. Which statement best describes a scientific theory?
A. An untested guess
B. A proven fact
C. A well-supported explanation based on extensive evidence
D. A personal opinion
Answer:
C. A well-supported explanation based on extensive evidence
Explanation:
Scientific theories explain natural phenomena and are supported by repeated experimentation.
6. Which subatomic particle has a positive charge?
A. Electron
B. Neutron
C. Proton
D. Photon
Answer:
C. Proton
Explanation:
Protons carry a positive charge and are found in the nucleus of an atom.
, 7. Which bond forms when atoms share electrons?
A. Ionic bond
B. Covalent bond
C. Hydrogen bond
D. Metallic bond
Answer:
B. Covalent bond
Explanation:
Covalent bonds involve the sharing of electron pairs between atoms.
8. Water is considered a polar molecule because:
A. It has no electrons.
B. Oxygen attracts electrons more strongly than hydrogen.
C. Hydrogen has a positive charge only.
D. Water contains ionic bonds.
Answer:
B. Oxygen attracts electrons more strongly than hydrogen.
Explanation:
This unequal sharing of electrons creates partial charges within the molecule.
9. Which property of water helps insects walk across its surface?
A. High heat capacity
B. Surface tension
C. Adhesion
D. Solubility
Answer:
B. Surface tension
Explanation:
Hydrogen bonding between water molecules creates strong surface tension.
