Chapter 5 Flashcards
What is the major distinction between a prokaryotic and a eukaryotic cell?
A. A prokaryotic cell does not have a nucleus, whereas a eukaryotic cell does.
B. A prokaryotic cell does not have ribosomes, wehreas a eukaryotic cell does.
C. A prokaryotic cell is smaller than a eukaryotic cell.
D. Prokaryotic cells have not prospered, whereas eukaryotic cells are evolutionary “successes.”
E. A prokaryotic cell cannot obtain energy from its environment.
A
How does the surface area-to-volume ratio of a 1-mm cube compare to the surface area-to-volume ratio of a 3-mm cube?
A. The 3-mm cube has a higher ratio.
B. The ratio increases as the cube becomes larger.
C. Increasing the volume increases the ratio.
D. The ratio decreases as the cube becomes larger.
E. The ratio does not change.
D
A large organelle found in eukaryotic cells that genetically controls the cell’s activities is the
A. chloroplast.
B. nucleus.
C. mitochondrion.
D. vacuoule.
E. centriole.
B
The endomembrane system
A. dos not exist in plant cells.
B. is present in both prokaryotes and eukaryotes.
C. gives animal cells their shape.
D. includes the nucleus, endoplasmic reticulum, mitochondria.
E. includes the Golgi apparatus and the endoplasmic reticulum.
E
Which one of the following organelles is though to have arisen from an endosymbiotic relationship with a prokaryote?
A. Mitochondria
B. Nuclei
C. Golgi apparatus
D. Lysosomes
E. Peroxisomes
A
The type of cell that always lacks a cell wall is the ___ cell.
A. bacterial
B. plant
C. animal
D. fungal
E. prokaryotic
C
Which of the following is not a component of the endomembrane system?
A. rough endoplasmic reticulum
B. smoom endoplasmic reticulum
C. golgi apparatus
D. lysosomes
E. plastids
E
Microvilli are created by projections of
A. microtubules.
B. actin.
C. mysosin.
D. intermediate filaments.
E. none of the above
B
Which of the following statements about the nuclear envelope is true?
A. It contains pores for the passage of large molecules.
B. It is composed of two membranes.
C. It contains ribosomes on the inner surface.
D. Both a and b
E. All of the above
D
The cytosol
A. is a static region of the cell.
B. contains DNA.
C. is composed largely of water.
D. supports the cell and determines its shape.
E. chemically modifies proteins and other molecules.
C
The organelle shown is found in all cells but is most numerous in cells requiring a large amount of energy (e.g., liver cells). what is the name of this organelle?
A. Lysosome
B. Golgi apparatus
C. Rough endoplasmic reticulum
D. Mitochondrion
E. Chloroplast
D
Lysosomes are important to eukaryotic cells because they contain
A. photosynthetic pigments.
B. starch molecules for energy storage.
C. their own DNA molecules.
D. the cells’ waste materials.
E. digestive enzymes.
E
Microtubules are made of
A. actin, and they function in locomotion.
B. tubulin, and they are essential in chromosome ditribution during mitosis.
C. tubulin, and they are found in microvilli.
D. actin, and they function to change cell shape.
E. polysaccharides, and they function in locomotion.
B
The major factor limiting cell size is the
A. concentration of water in the cytoplasm.
B. need for energy.
C. presence of membrane-enclosed organelles.
D. ratio of surface area to volume.
E. composition of the plasma membrane.
D
Which structure is generally present in both prokaryotic cells and eukaryotic plant cells?
A. Chloroplasts
B. Cell wall
C. Nucleus
D. Mitochondria
E. Microtubules
B
If all the lysosomes within a cell suddenly ruptured, what would be the most likely result?
A. The macromolecules in the cytosol would break down.
B. More proteins would be made.
C. The DNA within mitochondria would break down.
D. The mitochondria and chloroplasts would divide.
E. There would be no change in cell function.
A
The Golgi apparatus
A. is found only in animals.
B. is found in prokaryotes.
C. is the appendage that moves a cell around in its environment.
D. is a site of rapid ATP production.
E. modifies and packages proteins.
E
Which statement about mitochondria is not true?
A. The inner mitochondrial membrane folds to form cristae.
B. The outer membrane is relatively permeable to macromolecules.
C. Mitochondria are green because they contain chlorophyll.
D. Fuel molecules from the cytosol are used for respiration in mitochondria.
E. ATP is synthesized in mitochondria.
C
Which statement about plastids is true?
A. They are found in prokaryotes.
B. They are surrounded by a single membrane.
C. They are the sites of cellular respiration.
D. They are found only in fungi.
E. They may contain several types of pigments or polysaccharides.
E
Which structure is not surrounded by one or more membranes?
A. Ribosome
B. Chloroplast
C. Mitochondrion
D. Peroxisome
E. Vacuole
A
The cytoskeleton consists of
A. cilia, flagella, and microfilaments.
B. cilia, microtubules, and microfilaments.
C. internal cell walls.
D. microtubules, intermediate filaments, and microfilaments.
E. calcified microtubules.
D
Microfilaments
A. are composed of polysaccharides.
B. are composed of actin.
C. allow cilia and flagella to move.
D. make up the spindle that aids the movement of chromosomes.
E. maintain the position of the chloroplast in the cell.
B
Which statement about the plant cell wall is not true?
A. Its principal chemical components are polysaccharides.
B. It lies outside the plasma membrane.
C. It provides support for the cell.
D. It completely isolates adjacent cells from one another.
E. It is semirigid.
D
Looking at the scale shown here, how many times larger would a bacterium with a diameter of 10 µm be than a molecule with a diameter of 1 nm?
A. 4
B. 10
C. 100 (102)
D. 1,000 (103)
E. 10,000 (104)
E