Exam 3: Cell Structure and Internal Compartments

Organisms whose cells lack internal,membrane-bound organelles are classified as ________.

Multicellularity does not characterize all types of organisms living today; which eukaryotic kingdoms retain unicellular representatives?

Strong evidence that multicellularity conveys adaptive value to multicellular organisms is provided by the fact that it

A cell structure that pinches off from a membrane,encloses material,and then fuses with another membrane to release its contents at its destination is called a(n)________.

The magnification of a specimen by a light microscope is a result of

In the chloroplast,pancake-like,membrane-bound structures known as ________ are arranged into stacks.

Which of the following statements is FALSE?

The hydrophobic portions of a membrane's phospholipid bilayer are oriented toward the interior of the membrane and pointed away from aqueous environments.

The ________ found in eukaryotic cells have cristae.

Membrane-enclosed structures in eukaryotic cells are called ________.

Volvox,the multicellular green alga shown here,has flagellated cells on its surface cells,but not on interior cells.Which of the following is the most likely explanation for the development of this condition?

The plasma membrane of a cell and the membrane boundaries of organelles,such as mitochondria and chloroplasts,serve similar functions.What is one of the main functions of the membranes of both cells and organelles?

Which of the following diseases is NOT caused by a malfunction of or problem in the lysosomes?

Which of the following molecules is NOT found associated with the plasma membrane?

Protists use cilia to move within their habitat,but ciliated human cells like those in the bronchi are always anchored to one another and to an extracellular matrix; what benefit does cilia provide these cells?

Which of the following statements about mitochondria and chloroplasts is FALSE?

The ________ endoplasmic reticulum is covered with ribosomes.

The ________ is the place where the majority of the genetic material in a eukaryotic cell is stored.

The definition of life is somewhat arbitrary; the critical aspect(s)that currently define(s)cells as living structures is (are)

Imagine examining a cell using a light microscope; a prokaryote could be distinguished from a eukaryote by the absence of