Rio BIO 156 Exam 1 2026 |
Comprehensive Exam Questions
and Correct Answers | Newest
Exam
Description: This study set contains 100 multiple-choice questions covering all major
topics from Rio BIO 156 Exam 1, including scientific method, chemistry of life, cell
structure, membrane transport, metabolism, enzymes, and cellular respiration. Each
question includes the correct answer marked with ✅ for efficient revision.
Keywords: BIO 156, Exam 1, biology, cells, macromolecules, enzymes, ATP, cellular
respiration, membrane transport, scientific method, Rio Salado
1. What is the first step of the scientific method?
A. Form a hypothesis
B. Make an observation ✅
C. Conduct an experiment
D. Draw a conclusion
2. A hypothesis must be:
A. Proven true
B. Testable and falsifiable ✅
C. Based on opinion
D. A theory
3. In an experiment, the variable that is manipulated is the:
A. Dependent variable
,B. Control group
C. Independent variable ✅
D. Constant
4. The group that does not receive treatment is the:
A. Experimental group
B. Control group ✅
C. Variable group
D. Placebo group
5. A scientific theory is:
A. A guess
B. A well-supported explanation ✅
C. Never changing
D. The same as a hypothesis
6. The smallest unit of matter is:
A. Molecule
B. Atom ✅
C. Cell
D. Electron
7. The atomic number equals the number of:
A. Neutrons
B. Protons ✅
C. Electrons + neutrons
D. Protons + neutrons
8. Isotopes differ in the number of:
A. Protons
B. Electrons
C. Neutrons ✅
D. Bonds
,9. An ionic bond forms when:
A. Electrons are shared
B. Electrons are transferred ✅
C. Protons are shared
D. Neutrons are lost
10. A covalent bond forms when:
A. Electrons are transferred
B. Electrons are shared ✅
C. Ions attract
D. Hydrogen bonds form
11. Water is polar because:
A. It has no charge
B. Oxygen is more electronegative than hydrogen ✅
C. It is a small molecule
D. It has ionic bonds
12. Which property of water allows it to moderate temperature?
A. Adhesion
B. High specific heat ✅
C. Low density
D. Polarity
13. The pH scale measures:
A. Temperature
B. Hydrogen ion concentration ✅
C. Oxygen levels
D. Salinity
14. A solution with pH 3 is:
A. Basic
B. Neutral
, C. Acidic ✅
D. Alkaline
15. Which is a buffer?
A. HCl
B. NaOH
C. Bicarbonate ✅
D. NaCl
16. The four major macromolecules are:
A. Proteins, lipids, carbs, nucleic acids ✅
B. Proteins, vitamins, carbs, water
C. Lipids, minerals, DNA, RNA
D. Carbs, salts, acids, bases
17. Monomers of proteins are:
A. Monosaccharides
B. Amino acids ✅
C. Nucleotides
D. Fatty acids
18. Monomers of carbohydrates are:
A. Amino acids
B. Monosaccharides ✅
C. Glycerol
D. Nucleotides
19. Which bond links amino acids?
A. Glycosidic
B. Peptide ✅
C. Ester
D. Phosphodiester
Comprehensive Exam Questions
and Correct Answers | Newest
Exam
Description: This study set contains 100 multiple-choice questions covering all major
topics from Rio BIO 156 Exam 1, including scientific method, chemistry of life, cell
structure, membrane transport, metabolism, enzymes, and cellular respiration. Each
question includes the correct answer marked with ✅ for efficient revision.
Keywords: BIO 156, Exam 1, biology, cells, macromolecules, enzymes, ATP, cellular
respiration, membrane transport, scientific method, Rio Salado
1. What is the first step of the scientific method?
A. Form a hypothesis
B. Make an observation ✅
C. Conduct an experiment
D. Draw a conclusion
2. A hypothesis must be:
A. Proven true
B. Testable and falsifiable ✅
C. Based on opinion
D. A theory
3. In an experiment, the variable that is manipulated is the:
A. Dependent variable
,B. Control group
C. Independent variable ✅
D. Constant
4. The group that does not receive treatment is the:
A. Experimental group
B. Control group ✅
C. Variable group
D. Placebo group
5. A scientific theory is:
A. A guess
B. A well-supported explanation ✅
C. Never changing
D. The same as a hypothesis
6. The smallest unit of matter is:
A. Molecule
B. Atom ✅
C. Cell
D. Electron
7. The atomic number equals the number of:
A. Neutrons
B. Protons ✅
C. Electrons + neutrons
D. Protons + neutrons
8. Isotopes differ in the number of:
A. Protons
B. Electrons
C. Neutrons ✅
D. Bonds
,9. An ionic bond forms when:
A. Electrons are shared
B. Electrons are transferred ✅
C. Protons are shared
D. Neutrons are lost
10. A covalent bond forms when:
A. Electrons are transferred
B. Electrons are shared ✅
C. Ions attract
D. Hydrogen bonds form
11. Water is polar because:
A. It has no charge
B. Oxygen is more electronegative than hydrogen ✅
C. It is a small molecule
D. It has ionic bonds
12. Which property of water allows it to moderate temperature?
A. Adhesion
B. High specific heat ✅
C. Low density
D. Polarity
13. The pH scale measures:
A. Temperature
B. Hydrogen ion concentration ✅
C. Oxygen levels
D. Salinity
14. A solution with pH 3 is:
A. Basic
B. Neutral
, C. Acidic ✅
D. Alkaline
15. Which is a buffer?
A. HCl
B. NaOH
C. Bicarbonate ✅
D. NaCl
16. The four major macromolecules are:
A. Proteins, lipids, carbs, nucleic acids ✅
B. Proteins, vitamins, carbs, water
C. Lipids, minerals, DNA, RNA
D. Carbs, salts, acids, bases
17. Monomers of proteins are:
A. Monosaccharides
B. Amino acids ✅
C. Nucleotides
D. Fatty acids
18. Monomers of carbohydrates are:
A. Amino acids
B. Monosaccharides ✅
C. Glycerol
D. Nucleotides
19. Which bond links amino acids?
A. Glycosidic
B. Peptide ✅
C. Ester
D. Phosphodiester
