Rio Bio 156 Exam 1 , 2025|2026 ACTUAL COMPREHENSIVE
REAL EXAM QUESTIONS AND CORRET ANSWERS
(VERIFIED ANSWERS) ALREADY GRADED A+ / NEWEST
EXAM / JUST RELEASED!!
Identify a peptide bond and explain how it is formed. -
ANSWER-covalent bond that links amino acids in a protein
During protein synthesis, a peptide bond forms between the
carboxyl group of the first amino acid and the amine group of
the second
Define the primary, secondary (two forms), tertiary, and
quaternary structure of a protein. - ANSWER-1. primary
structure is order of the amino acids 2. secondary structure
has alpha helix and the beta pleated sheet. tertiary structure
interactions between the r- groups of amino acids.
3. quaternary structure is the interaction between multiple
polypeptide chains. 4. making up membrane structure,
antibodies, enzymes, neurotoxins, and hair and nail structure.
also used as an energy source.
List the major components of a nucleotide - ANSWER-
monomers of nucleic acids. contains sugar, nitrogen base, and
one ore more phosphate groups.
,Cite the key features of the Cell Theory. - ANSWER-1. Every
living organism consists of one or more cells.
2. The cell is the structural and functional unit of all organisms.
A cell is the smallest unit of life, individually alive even as
part of a multicelled organism.
3. All living cells arise by division of preexisting cells.
4. Cells contain hereditary material, which they pass to their
offspring when they divide.
Compare and contrast the structure and function of
mitochondria and
chloroplasts. - ANSWER-mitochondria: Makes ATP by
glucose breakdown
chloroplast: Makes sugars (in plants, some protists)
List several surface structures of cells and explain how they
help cells survive. -
ANSWER-Cell Wall: Protects, structurally
supports cell
Plasma membrane: selectively permeable and controls
exchanges between the
cell and its
environment.
, Describe the major kinds of microscopes and explain
their main use. -
ANSWER-Light microscope uses light to pass through
the image onto
magnifying
lenses.
Scanning electron microscope scans the outside of
cell surfaces.
Transmission electron microscope can magnify the internal
cellular structures.
Describe how the relationship between the surface area of a cell
and its volume
changes as the cell increases in size. - ANSWER-A cell's
surface area
increases with the square of its diameter, while its volume
increases with the
cube. This surface- to-volume ratio limits cell size and
influences cell shape.
Explain two reasons why smaller cells are biologically more
efficient than larger cells. - ANSWER-The rate of exchange
across a plasma membrane depends on its surface area: The
REAL EXAM QUESTIONS AND CORRET ANSWERS
(VERIFIED ANSWERS) ALREADY GRADED A+ / NEWEST
EXAM / JUST RELEASED!!
Identify a peptide bond and explain how it is formed. -
ANSWER-covalent bond that links amino acids in a protein
During protein synthesis, a peptide bond forms between the
carboxyl group of the first amino acid and the amine group of
the second
Define the primary, secondary (two forms), tertiary, and
quaternary structure of a protein. - ANSWER-1. primary
structure is order of the amino acids 2. secondary structure
has alpha helix and the beta pleated sheet. tertiary structure
interactions between the r- groups of amino acids.
3. quaternary structure is the interaction between multiple
polypeptide chains. 4. making up membrane structure,
antibodies, enzymes, neurotoxins, and hair and nail structure.
also used as an energy source.
List the major components of a nucleotide - ANSWER-
monomers of nucleic acids. contains sugar, nitrogen base, and
one ore more phosphate groups.
,Cite the key features of the Cell Theory. - ANSWER-1. Every
living organism consists of one or more cells.
2. The cell is the structural and functional unit of all organisms.
A cell is the smallest unit of life, individually alive even as
part of a multicelled organism.
3. All living cells arise by division of preexisting cells.
4. Cells contain hereditary material, which they pass to their
offspring when they divide.
Compare and contrast the structure and function of
mitochondria and
chloroplasts. - ANSWER-mitochondria: Makes ATP by
glucose breakdown
chloroplast: Makes sugars (in plants, some protists)
List several surface structures of cells and explain how they
help cells survive. -
ANSWER-Cell Wall: Protects, structurally
supports cell
Plasma membrane: selectively permeable and controls
exchanges between the
cell and its
environment.
, Describe the major kinds of microscopes and explain
their main use. -
ANSWER-Light microscope uses light to pass through
the image onto
magnifying
lenses.
Scanning electron microscope scans the outside of
cell surfaces.
Transmission electron microscope can magnify the internal
cellular structures.
Describe how the relationship between the surface area of a cell
and its volume
changes as the cell increases in size. - ANSWER-A cell's
surface area
increases with the square of its diameter, while its volume
increases with the
cube. This surface- to-volume ratio limits cell size and
influences cell shape.
Explain two reasons why smaller cells are biologically more
efficient than larger cells. - ANSWER-The rate of exchange
across a plasma membrane depends on its surface area: The
