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