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| 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 |
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| 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. |
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| 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 |
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| 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 |
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| 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 |
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| 6 | |
Oxidative metabolism takes place in the ___________________ of the cell. |
| | A) | Golgi complex |
| | B) | endoplasmic reticulum |
| | C) | mitochondria |
| | D) | nucleus |
| | E) | peroxisome |
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| 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 |
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| 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 |
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| 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 |
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| 10 | |
Mitochondria and chloroplasts are organelles in eukaryotes that have properties of prokaryotes, suggesting an ancient symbiotic origin. |
| | A) | True |
| | B) | False |
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| 11 | |
The nucleoplasm is connected to the cytoplasm through the action of: |
| | A) | nucleoli |
| | B) | chromatin |
| | C) | chromosomes |
| | D) | nuclear pores |
| | E) | endoplasmic reticulum |
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| 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 |
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| 13 | |
A major function of chloroplasts is to convert the energy of sunlight into carbohydrates. |
| | A) | True |
| | B) | False |
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| 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 |
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| 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 |
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| 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. |
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| 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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