Rio Bio 156 Exam 1 Questions and Answers with Verified Solutions |
Latest 2026 Update
Q: 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.
Q: Describe how the relationship between the surface area of a cell and its volume
changes as the
Answer:
cell increases in size. 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.
,Rio Bio 156 Exam 1 Questions and Answers with Verified Solutions |
Latest 2026 Update
Q: 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 bigger
it is, the
more substances can cross it during a given interval.
Q: Describe the eukaryotic nucleus
Answer:
Keeps DNA separated from cytoplasm; makes ribosome
subunits; controls access to DNA
, Rio Bio 156 Exam 1 Questions and Answers with Verified Solutions |
Latest 2026 Update
Q: Identify the unique features of a prokaryotic cell
Answer:
cytoplasm with ribosome
dna
plasma membrane
cell wall
capsule
pilus
bacterial flagellum
Q: Vesicles
Answer:
membrane-enclosed sacs that often form by budding from other components of
the endomembrane system. Many transport substances among organelles of the ER,
and to and
from the plasma membrane. Other vesicles store or break down substances.
Latest 2026 Update
Q: 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.
Q: Describe how the relationship between the surface area of a cell and its volume
changes as the
Answer:
cell increases in size. 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.
,Rio Bio 156 Exam 1 Questions and Answers with Verified Solutions |
Latest 2026 Update
Q: 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 bigger
it is, the
more substances can cross it during a given interval.
Q: Describe the eukaryotic nucleus
Answer:
Keeps DNA separated from cytoplasm; makes ribosome
subunits; controls access to DNA
, Rio Bio 156 Exam 1 Questions and Answers with Verified Solutions |
Latest 2026 Update
Q: Identify the unique features of a prokaryotic cell
Answer:
cytoplasm with ribosome
dna
plasma membrane
cell wall
capsule
pilus
bacterial flagellum
Q: Vesicles
Answer:
membrane-enclosed sacs that often form by budding from other components of
the endomembrane system. Many transport substances among organelles of the ER,
and to and
from the plasma membrane. Other vesicles store or break down substances.
