Biology (Raven), 9th Edition

Chapter 4: Cell Structure

Post-Test

1
Which of the following microscopes employing electron beams and has 1000 times the resolving power of a light microscope?
A)Scanning electron microscope
B)Transmission electron microscope
C)Compound microscope
D)Phase-contrast microscope
E)Dark-field microscope
2
The nucleus of the eukaryotic cell functions:
A)as the command center for the cell
B)to store the cell's hereditary information
C)to house the nucleolus
D)to selectively allow certain molecules access to the genetic material and to exit to the cytoplasm
E)All of the choices are correct.
3
An extensive system of internal membranes, called the ________________, is where carbohydrates and lipids are manufactured, and proteins are made that will be exported from the cell.
A)nucleolus
B)nucleoid
C)mitochondria
D)golgi apparatus
E)endoplasmic reticulum
4
______________ function in the collection, packaging, and distribution of molecules made in the cell.
A)Mitochondria
B)Ribosomes
C)Golgi bodies
D)Peroxisomes
E)Vacuole
5
Two organelles that are believed to have once been free-living bacterial cells are __________________ and _________________.
A)ribosomes; nucleolus
B)Golgi complex; endoplasmic reticulum
C)peroxisomes; lysosomes
D)nucloid; flagella
E)chloroplasts; mitochondria
6
Oxidative metabolism takes place in the ___________________ of the cell.
A)Golgi complex
B)endoplasmic reticulum
C)mitochondria
D)nucleus
E)peroxisome
7
One organelle, called the _______________, contains enzymes that digest worn out parts of cells.
A)ribosome
B)lysosome
C)vacuoles
D)endoplasmic reticulum
E)centriole
8
Which organisms do NOT have centrioles?
A)Animals and protists
B)Plants and animals
C)Fungi and protists
D)Plants and fungi
E)ALL living cells contain centrioles
9
Eukaryotes must organize their microtubules, especially during cell division. What region is responsible for serving as the microtubule-organizing center for ALL eukaryotic cells?
A)the nuclear membrane
B)pericentriolar material
C)centrioles
D)centrosomes
E)centromeres
10
Mitochondria and chloroplasts are organelles in eukaryotes that have properties of prokaryotes, suggesting an ancient symbiotic origin.
A)True
B)False
11
The nucleoplasm is connected to the cytoplasm through the action of:
A)nucleoli
B)chromatin
C)chromosomes
D)nuclear pores
E)endoplasmic reticulum
12
Which of the following is not a function of the Golgi apparatus?
A)Synthesizing protein
B)Packaging protein
C)Sorting protein
D)Collecting protein
E)All of these are functions of the Golgi apparatus
13
A major function of chloroplasts is to convert the energy of sunlight into carbohydrates.
A)True
B)False
14
The three principle fibers of the cytoskeleton are:
A)Actin, myosin, and centrioles
B)Actin, tubulin, and myosin
C)Microtubules, microfilaments, and intermediate filaments
D)Proteins, phospholipids, and polysaccharides
E)Vesicles, connector molecules, and molecular motors
15
The "9 + 2" architecture of microtubules is associated with which of the following structures?
A)intermediate filaments
B)centrioles
C)centrosomes
D)ribosomes
E)flagella
16
Plasmodesmata and gap junctions
A)allow small molecules and ions to pass rapidly between cells.
B)are both membrane lined channels.
C)are channels about 1 mm in diameter.
D)are present are in small numbers in a cell.
E)are involved in cell recognition in signaling.
17
What property must a molecule have to cross a membrane and initiate a response?
A)It must have hydrophilic properties
B)It must have hydrophobic properties
C)It must have sulfur in its structure
D)It must degrade DNA
E)It needs to have many alpha helices
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