Chapter 4 - Microscope
Bacterial cells are prokaryotic; unlike a typical eukaryotic cell, they ______.
lack a nucleus
A normal size range for a typical eukaryotic cell is ______.
10 to 100 micrometers
The eyepiece of a light microscope has a magnification level of 10x. If you were looking at a paramecium under the lowest objective (4x), what would be the total magnification of the microscope at this setting?
40x
Which of the following structure(s) is/are found in prokaryotic cells? A) Nucleus B) Ribosomes C) Mitochondria D) Endoplasmic Reticulum (ER)
B
Architecture of cell surfaces can be viewed in the most detail using a _______.
Scanning Electron Microscope * it uses an electron beam to provide a detailed pic of outlines of the surface
To enter or leave any cell, substances must pass through _____.
The plasma membrane
What microscope is best suited to the measurement of the internal structure of a bacterial cell?
Transmission Electron Microscope
If you wished to clearly observe the organelles inside of a white blood cell, which type of microscope would you choose?
Transmission Electron Microscope *this microscope allows you to view internal structures of living cells
A certain cell has a dense nucleoid region, ribosomes, but no membran-enclosed organelles. Based on this information, it could be ______.
an archaean *Archaea and other prokaryotes have no internal membrane-enclosed organalles. However, they do have both ribosomes and a region called nucleoid region where DNA can be found.
The term resolving power refers to ______.
clarity of the image in showing two objects as separate
The maximum size of a cell is limited by _______.
its need for enough surface area to make exchanges with its environment *volume increases at a faster rate than surface area, large cells have proportionately less plasma membrane surface area
Which of the following would distinguish a bacterial cell from an animal cell?
the presence of a cell wall *some eukaryotic cells don't have a cell wall *cell wall is different from cell membrane
What tells you whether the cell is prokaryotic or eukaryotic?
whether or not the cell is partitioned into compartments by internal membranes