Bio Ch 4

25 July 2022
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43 test answers
question
Which theory states that all living things are composed of cells?
answer
cell theory
question
What type of microscope would be best for studying the detailed structure of the surface of a plasma membrane?
answer
light microscope
question
Which of the following is a feature of prokaryotic cells but not eukaryotic cells?
answer
pili
question
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.
answer
prokaryotic
question
One difference between eukaryotic and prokaryotic cells is that eukaryotic cells have membrane enclosed structures called ___________ which are lacking in prokaryotic cells.
answer
organelles
question
In eukaryotic cells, what name is given to the region between the nucleus and the plasma membrane?
answer
cytoplasm
question
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.
answer
plant
question
Regulating the traffic of chemicals into and out of the cell is a function of the
answer
plasma membrane
question
what are the major lipids of plasma membranes?
answer
phospholipids
question
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.
answer
hydrophilic; hydrophobic
question
The concept of a membrane as a fluid mosaic reflects the ability of
answer
phospholipids and proteins to drift
question
the extracellular matrix of animal cells does what?
answer
protects and supports cells
question
____ store the information necessary to produce proteins
answer
genes
question
the nuclear envelope is composed of a
answer
double membrane
question
the structural combination of dna and proteins forms
answer
chromatin
question
Most human cells contain how many chromosomes?
answer
46
question
which structure manufactures the components of ribosomes?
answer
nucleolus
question
some ribosomes are suspended in the cytosol of a cell, whereas other ribosomes are attached to the ________ of the nucleus
answer
outside
question
where does protein synthesis take place?
answer
cytoplasm
question
information is transferred from the nucleus to ribosomes via _______
answer
mRNA
question
the endomembrane system includes
answer
membranous organelles
question
a hormone that will be secreted from the cell is manufactured by ________ attached to the endoplasmic reticulum.
answer
ribosomes
question
based on its function in detoxifying drugs, you would expect to find a large amount of smooth ER in what cells?
answer
liver cells
question
functions of he smooth ER include lipid synthesis, ________ synthesis, and drug detoxification.
answer
steroid
question
what structures move proteins from the ER to the golgi apparatus?
answer
transport vehicles
question
what is a function of the golgi apparatus?
answer
it distributes, receives, refines, and stores chemical products. (modifies proteins)
question
which of the following parts of a cell is/are most like the shipping center of a company?
answer
the golgi apparatus
question
lysosomes are responsible for
answer
intracellular digestion
question
if a cell's lysosomes burst, the cell would
answer
digest itself
question
Tay-Sachs disease results from _________ lacking a specific type of lipid-digesting enzyme
answer
lysosomes
question
vacuoles are
answer
membranous sacs
question
a protist that contains contractile vacuoles most likely lives in
answer
fresh water
question
in plant cells, __________ may contain organic nutrients, pigments, and poisons.
answer
central vacuoles
question
plant cells, unlike animal cells, are characterized by the presence of a ______________.
answer
cell wall and central vacuole.
question
similar to the nucleus, chloroplasts and mitochondria are surrounded by _____ membranes.
answer
two
question
which organelle is responsible for photosynthesis?
answer
chloroplast
question
cellular respiration can be described as the conversion of the energy stored in __________ to energy stored in ________.
answer
food molecules; ATP
question
the cristae of a mitochondrion is an adaption to _________ the surface area of a part of a cell that is involved in cellular respiration.
answer
increase
question
microtubules are associated with
answer
maintenance of axons, cell shape, orientation of cellulose microfibrils, and mititotic spindle
question
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?
answer
the tobacco interferes with the cilia that helps the egg get to the uterus
question
What evidence suggests that mitochondria might have evolved before chloroplasts?
answer
almost all eukaryotic cells have mitochondria, but only some cells have chloroplasts
question
what is a characteristic of chloroplasts that suggests that they might have evolved from free living bacteria?
answer
chloroplasts have their own DNA
question
what is a characteristic of mitochondria that suggests that they might have evolved from free living bacteria?
answer
mitochondria have their own DNA
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question
Which theory states that all living things are composed of cells?
answer
cell theory
question
What type of microscope would be best for studying the detailed structure of the surface of a plasma membrane?
answer
light microscope
question
Which of the following is a feature of prokaryotic cells but not eukaryotic cells?
answer
pili
question
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.
answer
prokaryotic
question
One difference between eukaryotic and prokaryotic cells is that eukaryotic cells have membrane enclosed structures called ___________ which are lacking in prokaryotic cells.
answer
organelles
question
In eukaryotic cells, what name is given to the region between the nucleus and the plasma membrane?
answer
cytoplasm
question
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.
answer
plant
question
Regulating the traffic of chemicals into and out of the cell is a function of the
answer
plasma membrane
question
what are the major lipids of plasma membranes?
answer
phospholipids
question
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.
answer
hydrophilic; hydrophobic
question
The concept of a membrane as a fluid mosaic reflects the ability of
answer
phospholipids and proteins to drift
question
the extracellular matrix of animal cells does what?
answer
protects and supports cells
question
____ store the information necessary to produce proteins
answer
genes
question
the nuclear envelope is composed of a
answer
double membrane
question
the structural combination of dna and proteins forms
answer
chromatin
question
Most human cells contain how many chromosomes?
answer
46
question
which structure manufactures the components of ribosomes?
answer
nucleolus
question
some ribosomes are suspended in the cytosol of a cell, whereas other ribosomes are attached to the ________ of the nucleus
answer
outside
question
where does protein synthesis take place?
answer
cytoplasm
question
information is transferred from the nucleus to ribosomes via _______
answer
mRNA
question
the endomembrane system includes
answer
membranous organelles
question
a hormone that will be secreted from the cell is manufactured by ________ attached to the endoplasmic reticulum.
answer
ribosomes
question
based on its function in detoxifying drugs, you would expect to find a large amount of smooth ER in what cells?
answer
liver cells
question
functions of he smooth ER include lipid synthesis, ________ synthesis, and drug detoxification.
answer
steroid
question
what structures move proteins from the ER to the golgi apparatus?
answer
transport vehicles
question
what is a function of the golgi apparatus?
answer
it distributes, receives, refines, and stores chemical products. (modifies proteins)
question
which of the following parts of a cell is/are most like the shipping center of a company?
answer
the golgi apparatus
question
lysosomes are responsible for
answer
intracellular digestion
question
if a cell's lysosomes burst, the cell would
answer
digest itself
question
Tay-Sachs disease results from _________ lacking a specific type of lipid-digesting enzyme
answer
lysosomes
question
vacuoles are
answer
membranous sacs
question
a protist that contains contractile vacuoles most likely lives in
answer
fresh water
question
in plant cells, __________ may contain organic nutrients, pigments, and poisons.
answer
central vacuoles
question
plant cells, unlike animal cells, are characterized by the presence of a ______________.
answer
cell wall and central vacuole.
question
similar to the nucleus, chloroplasts and mitochondria are surrounded by _____ membranes.
answer
two
question
which organelle is responsible for photosynthesis?
answer
chloroplast
question
cellular respiration can be described as the conversion of the energy stored in __________ to energy stored in ________.
answer
food molecules; ATP
question
the cristae of a mitochondrion is an adaption to _________ the surface area of a part of a cell that is involved in cellular respiration.
answer
increase
question
microtubules are associated with
answer
maintenance of axons, cell shape, orientation of cellulose microfibrils, and mititotic spindle
question
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?
answer
the tobacco interferes with the cilia that helps the egg get to the uterus
question
What evidence suggests that mitochondria might have evolved before chloroplasts?
answer
almost all eukaryotic cells have mitochondria, but only some cells have chloroplasts
question
what is a characteristic of chloroplasts that suggests that they might have evolved from free living bacteria?
answer
chloroplasts have their own DNA
question
what is a characteristic of mitochondria that suggests that they might have evolved from free living bacteria?
answer
mitochondria have their own DNA