RIO BIO 156 EXAM 1 QUESTIONS AND
ANSWERS – SOLVED 100% CORRECT (LATEST
UPDATE 2025) || 100% GUARANTEED PASS
<RECENT VERSION>
RIO BIO 156 EXAM 1: 100 QUESTIONS AND ANSWERS
Chapter 1: The Study of Life
1. What is the smallest unit of life?
a) Atom
b) Molecule
c) Cell
d) Organ
2. The process by which organisms maintain a relatively stable internal
environment is called:
a) Metabolism
b) Homeostasis
c) Evolution
d) Development
3. Which of the following is the correct order of biological organization
from simplest to most complex?
a) Organ, tissue, cell, organ system
b) Cell, organ, tissue, organ system
c) Cell, tissue, organ, organ system
d) Tissue, cell, organ system, organ
4. A proposed explanation for a natural phenomenon is a(n):
a) Theory
b) Law
, c) Hypothesis
d) Observation
5. The genetic information within all living cells is stored in the molecule:
a) ATP
b) RNA
c) DNA
d) Protein
Chapter 2: The Chemical Basis of Life
6. A substance that cannot be broken down into other substances by
ordinary chemical procedures is a(n):
a) Element
b) Molecule
c) Compound
d) Ion
7. What three elements make up 98% of all living matter?
a) Carbon, Hydrogen, Nitrogen
b) Carbon, Oxygen, Phosphorus
c) Carbon, Hydrogen, Oxygen
d) Oxygen, Hydrogen, Nitrogen
8. Isotopes of an element have the same number of ______ but different
numbers of ______.
a) Neutrons; protons
b) Protons; electrons
c) Protons; neutrons
d) Electrons; neutrons
9. A covalent bond is formed when:
a) Two atoms share electrons
b) One atom donates an electron to another
c) A positive and negative ion attract each other
d) Hydrogen is attracted to a slightly negative atom
, 10.What type of bond is responsible for the surface tension of water?
a) Ionic bonds
b) Polar covalent bonds
c) Hydrogen bonds
d) Nonpolar covalent bonds
11.A solution with a pH of 5 is considered:
a) Acidic
b) Basic
c) Neutral
d) Alkaline
12.A substance that minimizes changes in pH by accepting or donating H+
ions is a(n):
a) Acid
b) Base
c) Salt
d) Buffer
13.The monomer of a carbohydrate is a:
a) Nucleotide
b) Amino acid
c) Fatty acid
d) Monosaccharide
14.Glucose, fructose, and galactose are all examples of:
a) Disaccharides
b) Polysaccharides
c) Monosaccharides
d) Lipids
15.Glycogen and starch are examples of ________ used for energy storage.
a) Proteins
b) Lipids
c) Polysaccharides
d) Disaccharides
ANSWERS – SOLVED 100% CORRECT (LATEST
UPDATE 2025) || 100% GUARANTEED PASS
<RECENT VERSION>
RIO BIO 156 EXAM 1: 100 QUESTIONS AND ANSWERS
Chapter 1: The Study of Life
1. What is the smallest unit of life?
a) Atom
b) Molecule
c) Cell
d) Organ
2. The process by which organisms maintain a relatively stable internal
environment is called:
a) Metabolism
b) Homeostasis
c) Evolution
d) Development
3. Which of the following is the correct order of biological organization
from simplest to most complex?
a) Organ, tissue, cell, organ system
b) Cell, organ, tissue, organ system
c) Cell, tissue, organ, organ system
d) Tissue, cell, organ system, organ
4. A proposed explanation for a natural phenomenon is a(n):
a) Theory
b) Law
, c) Hypothesis
d) Observation
5. The genetic information within all living cells is stored in the molecule:
a) ATP
b) RNA
c) DNA
d) Protein
Chapter 2: The Chemical Basis of Life
6. A substance that cannot be broken down into other substances by
ordinary chemical procedures is a(n):
a) Element
b) Molecule
c) Compound
d) Ion
7. What three elements make up 98% of all living matter?
a) Carbon, Hydrogen, Nitrogen
b) Carbon, Oxygen, Phosphorus
c) Carbon, Hydrogen, Oxygen
d) Oxygen, Hydrogen, Nitrogen
8. Isotopes of an element have the same number of ______ but different
numbers of ______.
a) Neutrons; protons
b) Protons; electrons
c) Protons; neutrons
d) Electrons; neutrons
9. A covalent bond is formed when:
a) Two atoms share electrons
b) One atom donates an electron to another
c) A positive and negative ion attract each other
d) Hydrogen is attracted to a slightly negative atom
, 10.What type of bond is responsible for the surface tension of water?
a) Ionic bonds
b) Polar covalent bonds
c) Hydrogen bonds
d) Nonpolar covalent bonds
11.A solution with a pH of 5 is considered:
a) Acidic
b) Basic
c) Neutral
d) Alkaline
12.A substance that minimizes changes in pH by accepting or donating H+
ions is a(n):
a) Acid
b) Base
c) Salt
d) Buffer
13.The monomer of a carbohydrate is a:
a) Nucleotide
b) Amino acid
c) Fatty acid
d) Monosaccharide
14.Glucose, fructose, and galactose are all examples of:
a) Disaccharides
b) Polysaccharides
c) Monosaccharides
d) Lipids
15.Glycogen and starch are examples of ________ used for energy storage.
a) Proteins
b) Lipids
c) Polysaccharides
d) Disaccharides
