Chapter 4 Reading Quiz Practice

A certain cell has a dense nucleoid region, ribosomes, but no membrane-enclosed organelles. Based on this information, it could be __________.

an archaean

4.3 Fimbriae

are surface appendages that allow a bacterium to stick to a surface.

What name is given to the rigid structure, found outside the plasma membrane, that surrounds and supports the bacterial cell?

cell wall

4.2 The maximum size of a cell is limited by

its need for enough surface area to make exchanges with its environment

Bacterial cells are prokaryotic; unlike a typical eukaryotic cell, they _____.

lack a nucleus

Which of the following organelles is found only in animal cells and NOT in most plant cells?

lysosome

Structures found within a eukaryotic cell and performing specific tasks are collectively termed __________.

organelles

You have identified a new organism. It has ribosomes, plasmodesmata, and cell walls made of cellulose. This new organism is most likely a(n) __________. plant prokaryote animal bacterium

plant

The _____ is the bacterial structure that acts as a selective barrier, allowing nutrients to enter the cell and wastes to leave the cell.

plasma membrane

Which of the following would distinguish a bacterial cell from an animal cell?

presence of a cell wall

4.3 What is the function of a bacterium's capsule?

protection

4.3 In a bacterium, where are proteins synthesized?

ribosomes

Which of the following structure(s) is/are found in prokaryotic cells? ribosomes endoplasmic reticulum nucleus mitochondria

ribosomes

4.2 To enter or leave any cell, substances must pass through

the plasma membrane

Which of the following clues would tell you whether a cell is prokaryotic or eukaryotic?

whether or not the cell is partitioned into compartments by internal membranes