bio ch 4
Terms in this set (43)
Which theory states that all living things are composed of cells?
What type of microscope would be best for studying the detailed structure of the surface of a plasma membrane?
Which of the following is a feature of prokaryotic cells but not eukaryotic cells?
When using a light microscope to view a cell you obtained from scraping under your fingernails, you notice that the cell lacks a nucleus, therefore it is a __________ cell.
One difference between eukaryotic and prokaryotic cells is that eukaryotic cells have membrane enclosed structures called ___________ which are lacking in prokaryotic cells.
In eukaryotic cells, what name is given to the region between the nucleus and the plasma membrane?
You find a cell of a type you have never seen before. the cell has both a nucleus and a cell wall. therefore you conclude that it must be a _______ cell.
Regulating the traffic of chemicals into and out of the cell is a function of the
what are the major lipids of plasma membranes?
when mixed with water, phospholipids spontaneously form membranes because they have ________ phosphate groups that are attracted to water and _________ fatty acid tails that avoid water.
The concept of a membrane as a fluid mosaic reflects the ability of
phospholipids and proteins to drift
the extracellular matrix of animal cells does what?
protects and supports cells
____ store the information necessary to produce proteins
the nuclear envelope is composed of a
the structural combination of dna and proteins forms
Most human cells contain how many chromosomes?
which structure manufactures the components of ribosomes?
some ribosomes are suspended in the cytosol of a cell, whereas other ribosomes are attached to the ________ of the nucleus
where does protein synthesis take place?
information is transferred from the nucleus to ribosomes via _______
the endomembrane system includes
a hormone that will be secreted from the cell is manufactured by ________ attached to the endoplasmic reticulum.
based on its function in detoxifying drugs, you would expect to find a large amount of smooth ER in what cells?
functions of he smooth ER include lipid synthesis, ________ synthesis, and drug detoxification.
what structures move proteins from the ER to the golgi apparatus?
what is a function of the golgi apparatus?
it distributes, receives, refines, and stores chemical products. (modifies proteins)
which of the following parts of a cell is/are most like the shipping center of a company?
the golgi apparatus
lysosomes are responsible for
if a cell's lysosomes burst, the cell would
Tay-Sachs disease results from _________ lacking a specific type of lipid-digesting enzyme
a protist that contains contractile vacuoles most likely lives in
in plant cells, __________ may contain organic nutrients, pigments, and poisons.
plant cells, unlike animal cells, are characterized by the presence of a ______________.
cell wall and central vacuole.
similar to the nucleus, chloroplasts and mitochondria are surrounded by _____ membranes.
which organelle is responsible for photosynthesis?
cellular respiration can be described as the conversion of the energy stored in __________ to energy stored in ________.
food molecules; ATP
the cristae of a mitochondrion is an adaption to _________ the surface area of a part of a cell that is involved in cellular respiration.
microtubules are associated with
maintenance of axons, cell shape, orientation of cellulose microfibrils, and mititotic spindle
tobacco smokers and those affected by tobacco smoke are at greater risk of a tubal pregnancy. based on your understanding, what is the best explanation?
the tobacco interferes with the cilia that helps the egg get to the uterus
What evidence suggests that mitochondria might have evolved before chloroplasts?
almost all eukaryotic cells have mitochondria, but only some cells have chloroplasts
what is a characteristic of chloroplasts that suggests that they might have evolved from free living bacteria?
chloroplasts have their own DNA
what is a characteristic of mitochondria that suggests that they might have evolved from free living bacteria?
mitochondria have their own DNA