Biology 108 Chapter 5 Quiz

The overall shape of a cell is determined by its :

cytoskeleton

Which type of organelle is found in plants but not in animals?

plastids

Which eukaryotic organelle is NOT membrane-bound?

centrioles, nucleolus

In physical terms, the size limit of a cell is determined by its :

plasma membrane

The shortest distance that can be resolved with the normal unaided eye is:

.2 mm

The width of a typical animal cell is closest to :

20 micrometers

What is the major distinction between prokaryotic and eukaryotic cells?

A prokaryotic cell does not have a nucleus, and a eukaryotic cell does.

What is the difference between "free" and "attached" ribosomes?

Free ribosomes are in the cytoplasm, while attached ribosomes are anchored to the endoplasmic reticulum. Free ribosomes produce proteins in the cytosol, while attached ribosomes produce proteins that are inserted into the ER lumen.

You would not expect to find RNA in which of the following structures?

Vacuole

Microtubules are composed of protein monomers of:

a- and B- tubulin

Which of the following represents a molecular motor protein?

dynein

Which of the following are found in prokaryotic cells?

enzymes

Some bacteria are able to propel themselves through liquid by means of a structure called the :

flagellum

An organelle found only in plant cells is the:

glyoxysome

The portion of the cytoskeleton found within the nucleus is:

intermediate cytoskeleton

The DNA of mitochondria:

is used to make some proteins needed for cellular respiration

Which of the following organelles are double membrane-bound?

nucleus, chloroplast, mitochondrion

The sequence of organelles/cell structures involved in the flow of newly- synthesized proteins to the cells' environment is:

rough ER-Golgi-plasma membrane

Which pairing of cellular structure/ function is incorrect?

smooth ER/cellulose production

The cell is the basic unit of function and reproduction because:

subcellular components cannot regenerate whole cells (but cells can).

Prokaryotes average about ________ times smaller (in diameter) than a typical eukaryote.

ten

What prevents a cell from becoming much larger and complex than it already is?

the rate of nutrient and waste exchange at the cell surface