BIO Chapter 4 Test
Evidence that all living cells have a origin is provided by?
Basic similarities in cell structure and chemistry
A basal body is most closely related to a:
Centriole
A cellular structure found in plant but not animal cells is the:
Chloroplast
which of the following structures would NOT be found in cells of a plant's roots?
Chloroplasts
DNA is associated with proteins, forming a complex called?
Chromatin
Which of the following is NOT a cell covering or part of a cell covering?
Cristae
The force necessary to cause microtubules of cilia and flagella to slide alongside one another is provided through the action of _______ proteins, which derive the energy to perform their work directly from _________ molecules.
Dynein; ATP
You want to determine the location of a specific protein in a cell using a colored stain. Which of the following is the best technique for this purpose?
Flouresecenes Microscopy
Proteins made on ribosomes may be further modified within the:
Golgi Complex
The __________ can be considered a sorting, processing and packaging center.
Golgi complex
One strategy that allows larger cells to have an effective surface area to volume ratio is?
Having thin, finger-like projections
The ratio of the size of the image seen with the microscope to the actual size of the object is called?
Magnification
A eukaryotic cell:
Membrane bound organelles
Which of the following is a key component of the cytoskeleton?
Microtubules
Which of the following organelles plays an important role in apoptosis, or programmed cell death?
Mitochondria
If a toxin, such as bacterial toxin, destroys ribosomes, what cellular activity will be affected first?
Proteinsynthesis
Nucleoli contains chromosomal regions that specialize in making?
RNA
Intermediate filaments are most closely associated with which of the following?
Revatins
The scanning electron microscope differs from the transmission electron microscope in that the scanning electron microscope:
Separates components of cells to different densities
The function of the smooth endoplasmic reticulum:
Synthesizes lipids
In this classic experiments by Bracht and Hammerling, the nucleus of Acetabularia was removed , the cap was cut off, a nucleus of a different species was inserted, and the cap was allowed to regenerate. The new cap was then removed. After the second regeneration, the cap was observed, and the following conclusion was made:
The shape of the cap was controlled by the nucleus, thus, the nucleus was the control center of the cell.
Electron microscopes have a much higher resolution than either the human eye or any light microscope because?
Wave lengths of electron short-
The cis face of the Golgi complex is most directly involved in which of the following?
accepting vesicles from ER
Which of the following pairs is correctly matched?
centrosome-cell division
A glycoprotein destined for secretion from the cell would move through the Golgi complex in this sequence:
cis face, to medial region, to transface
A single cell in a smoker's lung has become cancerous. It doubles its DNA and divides much faster than a normal lung cell. The most likely change that would have caused this condition took place in the:
nucleus/brain
Membrane-bounded organelles facilitate chemical reactions because?
reactants are within close proximity to each other
It is advantageous for cells to be small because?
A small cell has a small volume relative to surface area, thereby increasing efficient transport
As a result of testing an experimental drip on a vertebrate cell, you notice that the cell cortex becomes more fluid, and although the cell remains strong, it loses its ability to move. Based on this evidence, you correctly conclude that the drug most directly affected:
Actin Filaments
Which scientist first viewed living cells?
Anton Van Leewenhook