Chapter 4&5 study guide
Which statement about centrioles is false?
they have a 9 + 2 arrangement of microtubules
Name the part of the cell outside the nucleus
cytoplasm
A glycoprotein destined for secretion from the cell would move through the golgi complex in which sequence?
cis face, medial region, trans face
DNA transcribes its information into what type of molecule?
RNA
Mitochondria play an important role in cell necrosis (T/F)
True
Plastids
encloses internal thylakoid membrane
Vacuole
large membranous sacs in plants and fungi
The ratio of the size of the image seen with the microscope to the actual size of the object is called
magnification
a cell is surrounded by which distinctive surface membrane?
plasma membrane
what is a characteristic found in both prokaryotic and eukaryotic cells?
plasma membrane
Microfilaments
rod-like structures consisting of actin
The smooth ER is the primary site for the synthesis of proteins and cholesterol needed to make membranes (T/F)
false
which of the following is necessary for a cell to maintain its function and growth?
food
why is it advantageous for cells to be so small?
a small cell has a small volume relative to surface area, which allows efficient transportation through plasma membrane
The cis face of the golgi complex is most directly involved in which process?
accepting vesicles from the ER
Microfilaments are linked with one another and with other proteins by linker proteins (T/F)
False
Which technique is used to separate different parts of cells so that they can be studied by both physical and chemical methods?
cell fractionation
DNA is associated with certain proteins, forming a complex called:
chromatin
Which of the following statements about phospholipids is false?
they contain 3 fatty acids
evidence that all living cells have a common origin is provided by:
the fact that all new cells come from pre-existing cells
The term ¨fluid mosaic model¨ refers to
the movement of lipids and integral proteins within the lipid bilayer
What is the purpose of the cristae of the inner membrane of mitochondria?
increase surface area
Upon observing a cell of grass blade, you notice a prominent sac that occupies a large portion of the cell. Which organelle is this?
vacuole
Rough ER
That portion of the endoplasmic reticulum studded with ribosomes.
Cells that secrete large amounts of glycoprotein have any golgi stacks (T/F)
True
The smooth ER is the primary site for the synthesis of phospholipids and cholesterol needed to make _________.
cell membranes
Which cellular structure is correctly matched to the role it plays within the cell?
centrosome--- cell division
The outer membrane of the nuclear envelope is continuous with the membrane of the _______ and is usually covered with attached ribosomes.
endoplasmic reticulum
Proteins that are synthesized by ribosomes may be further modified within which organelle?
golgi complex
which strategy is most effective for larger cells to have an effective surface area to volume ratio?
having thin finger-like projections
In a lipid bilayer, _________ fatty acid tails face each other within the bilayer and form a region that excludes water
hydrophobic
Plants lack organ systems for disposing of toxic metabolic waste products. Their cells' vacuoles are like what animal cell organelle?
lysosomes
which one of these are the most convenient unit for measuring cells?
micrometer
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
Which two organelles are responsible for converting energy into forms that can be used by cells?
mitochondria and chloroplasts
specialized structures within a living cell are known as
organelles
What is the primary function of mitochondria?
transformation of energy
The micrometer is the most convenient unit for measuring cells (T/F)
true
