 |
| 1 | |
The word root kytos, as in cytoplasm, means |
| | A) | motion |
| | B) | a hollow |
| | C) | color |
| | D) | a thing formed |
|
|
|
| 2 | |
The ____________ produces an image of a specimen by passing visible light through it. |
| | A) | LM |
| | B) | SEM |
| | C) | TEM |
| | D) | none of the above |
|
|
|
| 3 | |
A detailed three-dimensional view of cell structure is provided by |
| | A) | light microscopy |
| | B) | transmission electron microscopy |
| | C) | scanning electron microscopy |
| | D) | all of the above |
|
|
|
| 4 | |
____________ are an example of cells that are specialized for storage. |
| | A) | epithelial cells |
| | B) | fibroblast cells |
| | C) | adipocytes |
| | D) | oocytes |
|
|
|
| 5 | |
Which cells are designed to recognize and attack antigens? |
| | A) | muscle cells |
| | B) | neurons |
| | C) | erythrocytes |
| | D) | leukocytes |
|
|
|
| 6 | |
Which of the following is not true of the plasma membrane? |
| | A) | contains receptors for communication |
| | B) | forms intercellular connections |
| | C) | is a rigid sheet of molecules with little flexibility |
| | D) | regulates material movement into and out of the cell |
|
|
|
| 7 | |
Extracellular fluid is also called |
| | A) | cytosol |
| | B) | intracellular fluid |
| | C) | interstitial fluid |
| | D) | cytoplasmic matrix |
|
|
|
| 8 | |
Plasma membranes contain all of the following except |
| | A) | phospholipids |
| | B) | peripheral steroids |
| | C) | integral proteins |
| | D) | glycolipids |
|
|
|
| 9 | |
Which of the following is not a protein-specific function of plasma membranes? |
| | A) | signal transduction |
| | B) | intercellular attachment |
| | C) | enzyme activity |
| | D) | physical isolation |
|
|
|
| 10 | |
All processes of moving materials across the plasma membrane are classified as either |
| | A) | diffusion or osmosis |
| | B) | passive or active transport |
| | C) | phagocytosis or pinocytosis |
| | D) | endocytosis or exocytosis |
|
|
|
| 11 | |
Processes that move molecules passively across the cell membrane include |
| | A) | diffusion |
| | B) | bulk filtration |
| | C) | osmosis |
| | D) | all of the above |
|
|
|
| 12 | |
Diffusion is the tendency of molecules to move |
| | A) | from a lower to a higher concentration |
| | B) | down their concentration gradient |
| | C) | into a cell by endocytosis |
| | D) | out of a cell by exocytosis |
|
|
|
| 13 | |
Which of the following are types of endocytosis? |
| | A) | facilitated diffusion and bulk filtration |
| | B) | osmosis and active transport |
| | C) | pinocytosis and phagocytosis |
| | D) | none of the above |
|
|
|
| 14 | |
A pocket formed by an inward folding of a membrane is called |
| | A) | an evagination |
| | B) | an invagination |
| | C) | a secretory vesicle |
| | D) | a vacuole |
|
|
|
| 15 | |
Cytosol |
| | A) | has a high water content, with many dissolved solutes |
| | B) | is the viscous, syruplike fluid component of cytoplasm |
| | C) | contains carbohydrates and lipids that provide energy for the cell |
| | D) | all of the above |
|
|
|
| 16 | |
Which organelles synthesize proteins? |
| | A) | ribosomes |
| | B) | nucleoli |
| | C) | centrioles |
| | D) | all of the above |
|
|
|
| 17 | |
Digestion and self-destruction are functions of which organelle? |
| | A) | nucleus |
| | B) | mitochondrion |
| | C) | lysosome |
| | D) | peroxisome |
|
|
|
| 18 | |
Which one of the following does not accurately describe microtubules? |
| | A) | composed of long chains of the protein tubulin |
| | B) | largest diameter of the three components of the cytoskeleton |
| | C) | associated with organelle movement and cell motility |
| | D) | participate in cytoplasmic streaming and muscle contraction |
|
|
|
| 19 | |
Most of a cell's ATP is synthesized by membrane-bound organelles called |
| | A) | ribosomes |
| | B) | mitochondria |
| | C) | lysosomes |
| | D) | nucleoli |
|
|
|
| 20 | |
The rough endoplasmic reticulum functions in |
| | A) | transport, respiration, and synthesis |
| | B) | contraction, transport, and diffusion |
| | C) | synthesis, storage, and transport |
| | D) | storage, transport, and digestion |
|
|
|
| 21 | |
Which organelle modifies, packages, and sorts proteins for secretion or use within the cell? |
| | A) | Golgi apparatus |
| | B) | lysosome |
| | C) | endoplasmic reticulum |
| | D) | nucleus |
|
|
|
| 22 | |
The most organized level of genetic material, visible with a light microscope only during cell division, is the |
| | A) | histone |
| | B) | chromatin |
| | C) | chromosome |
| | D) | nucleosome |
|
|
|
| 23 | |
Nucleoli make which of the following? |
| | A) | smooth and rough endoplasmic reticulum |
| | B) | ribosomal RNA and proteins |
| | C) | histones and DNA |
| | D) | all of the above |
|
|
|
| 24 | |
Which phase of a somatic cell's life cycle is the longest? |
| | A) | prophase |
| | B) | anaphase |
| | C) | metaphase |
| | D) | interphase |
|
|
|
| 25 | |
The correct sequence of the stages of mitosis is |
| | A) | metaphase, anaphase, telophase, prophase |
| | B) | prophase, anaphase, metaphase, telophase |
| | C) | telophase, metaphase, anaphase, prophase |
| | D) | prophase, metaphase, anaphase, telophase |
|
|
|
| 26 | |
During which stage of mitosis does chromatin coil into chromosomes? |
| | A) | metaphase |
| | B) | telophase |
| | C) | prophase |
| | D) | anaphase |
|
|
|
| 27 | |
The two copies of DNA in duplicated chromosomes are connected at a constricted region called the |
| | A) | double helix |
| | B) | centromere |
| | C) | centrosome |
| | D) | histone |
|
|
|
| 28 | |
____________ occurs when the chromosomes line up at the equatorial plate of the cell. |
| | A) | prophase |
| | B) | metaphase |
| | C) | anaphase |
| | D) | telophase |
|
|
|
| 29 | |
Sister chromatids pull apart to form single-stranded chromosomes during |
| | A) | anaphase |
| | B) | telophase |
| | C) | prophase |
| | D) | metaphase |
|
|
|
| 30 | |
The completion of ____________ marks the end of cell division. |
| | A) | prophase |
| | B) | cytokinesis |
| | C) | interphase |
| | D) | anaphase |
|
|
.