TEST 7 Flashcards
(200 cards)
1
Q
Cystic fibrosis (CF) is a genetic disorder that primarily affects which body system?
a) Respiratory system
b) Digestive system
c) Cardiovascular system
d) Musculoskeletal system
A
Respiratory system
2
Q
Which gene mutation is responsible for causing cystic fibrosis?
a) BRCA1
b) TP53
c) CFTR
d) APOE
A
CFTR
3
Q
How is cystic fibrosis inherited?
a) Autosomal dominant
b) Autosomal recessive
c) X-linked recessive
d) Mitochondrial inheritance
A
Autosomal recessive
4
Q
Which of the following is a common symptom of cystic fibrosis?
a) Chronic cough
b) Enlarged liver
c) Irregular heartbeat
d) Vision loss
A
Chronic cough
5
Q
Cystic fibrosis affects primarily which ethnic group?
a) Asian
b) African
c) Hispanic
d) Caucasian
A
Caucasian
6
Q
Cystic fibrosis is caused by a mutation in the ___________________ gene.
A
CFTR (Cystic Fibrosis Transmembrane Conductance Regulator)
7
Q
The thick mucus produced in cystic fibrosis can obstruct the ________________ ducts.
A
Pancreatic
8
Q
Cystic fibrosis patients often require ________________ supplementation to aid digestion.
A
Enzyme
9
Q
The sweat of individuals with cystic fibrosis has a higher concentration of ________________.
A
Salt (sodium chloride)
10
Q
The sweat test is a diagnostic method used to measure the levels of ________________ in individuals suspected of having cystic fibrosis.
A
Chloride
11
Q
Cystic fibrosis is a curable disease. True or false?
A
False
12
Q
Cystic fibrosis affects only the lungs. True or false?
A
False
13
Q
All individuals with cystic fibrosis have the same severity of symptoms. True or false?
A
False
14
Q
Cystic fibrosis is caused by exposure to environmental toxins. True or false?
A
False
15
Q
Cystic fibrosis can be diagnosed prenatally through genetic testing. True or false?
A
True
16
Q
What is the average life expectancy of individuals with cystic fibrosis?
a) 30-40 years
b) 50-60 years
c) 70-80 years
d) 90-100 years
A
50-60 years
17
Q
Which of the following organs is most commonly affected by cystic fibrosis?
a) Kidneys
b) Lungs
c) Heart
d) Stomach
A
Lungs
18
Q
Which type of cystic fibrosis is characterized by milder symptoms and a later onset?
a) Classic CF
b) Atypical CF
c) Late-onset CF
d) Variant CF
A
Atypical CF
19
Q
What is the main cause of death in individuals with cystic fibrosis?
a) Respiratory failure
b) Liver failure
c) Kidney failure
d) Heart failure
A
Respiratory failure
20
Q
Which of the following is NOT a risk factor for developing cystic fibrosis?
a) Family history of CF
b) Being a carrier of the CF gene
c) Exposure to cigarette smoke
d) Consuming a diet high in sugar
A
Consuming a diet high in sugar
21
Q
The first gene associated with cystic fibrosis was identified in ___________.
A
1989
22
Q
Cystic fibrosis is caused by the production of thick, sticky ___________.
A
Mucus
23
Q
The ___________________ sweat test is the gold standard for diagnosing cystic fibrosis.
A
Quantitative pilocarpine iontophoresis
24
Q
The majority of cystic fibrosis cases are diagnosed in ___________.
A
Childhood
25
Lung transplantation may be a treatment option for individuals with end-stage ___________ disease.
Pulmonary
26
How is cystic fibrosis typically diagnosed?
a) Blood test
b) Chest X-ray
c) Lung biopsy
d) Sweat test
Sweat test
27
Which of the following is NOT a common symptom of cystic fibrosis?
a) Chronic cough
b) Rapid weight gain
c) Bulky stool
d) Salty tasting skin
Rapid weight gain
28
What is the most common complication associated with cystic fibrosis?
a) Diabetes mellitus
b) Liver cirrhosis
c) Heart disease
d) Lung infections
Lung infections
29
Which of the following is a preventive measure for cystic fibrosis-related complications?
a) Regular exercise
b) Avoiding dairy products
c) Avoiding close contact with animals
d) Genetic counseling and testing
Genetic counseling and testing
30
What is the primary goal of cystic fibrosis treatment?
a) Cure the disease
b) Manage symptoms
c) Prevent complications
d) Reverse lung damage
Prevent complications
31
The thick mucus in cystic fibrosis can lead to ________________.
Lung infections
32
The gold standard for diagnosing cystic fibrosis is a positive result in the ________________ sweat test.
Chloride
33
In cystic fibrosis, the pancreas fails to produce enough ________________.
Enzymes
34
________________ therapy helps to clear mucus from the lungs in individuals with cystic fibrosis.
Chest physiotherapy
35
Cystic fibrosis affects approximately ________________ in every 2,500 to 3,500 Caucasian births.
1
36
Cystic fibrosis affects both males and females equally. True or false?
True
37
Lung transplantation is a potential treatment option for end-stage cystic fibrosis. True or false?
True
38
Cystic fibrosis is caused by a bacterial infection. True or false?
False
39
Exercise is not recommended for individuals with cystic fibrosis. True or false?
False
40
Newborn screening can help detect cystic fibrosis early. True or false?
True
41
Which of the following organs is commonly affected by cystic fibrosis, leading to digestive problems?
a) Liver
b) Pancreas
c) Kidneys
d) Spleen
Pancreas
42
What type of therapy involves inhaling a mist of salty water to help clear mucus from the airways?
a) Oxygen therapy
b) Gene therapy
c) Pulmonary rehabilitation
d) Nebulized therapy
Nebulized therapy
43
Which of the following is a potential complication of cystic fibrosis in males?
a) Infertility
b) Ovarian cysts
c) Uterine fibroids
d) Breast cancer
Infertility
44
Which of the following medications is commonly used to thin mucus and improve lung function in individuals with cystic fibrosis?
a) Insulin
b) Antibiotics
c) Bronchodilators
d) Corticosteroids
Bronchodilators
45
What is the average age of diagnosis for cystic fibrosis?
a) Birth
b) 2 years
c) 10 years
d) 18 years
2 years
46
The most common mutation in cystic fibrosis is known as ________________.
F508del (phenylalanine deletion)
47
Cystic fibrosis can lead to malnutrition and ________________.
Failure to thrive
48
The introduction of ________________ in the 1950s significantly improved the survival rates for individuals with cystic fibrosis.
Antibiotics
49
The median predicted survival age for individuals with cystic fibrosis is currently around ________________ years.
40
50
All surgeries for cystic fibrosis are very dangerous due to post-operative complications. True or false?
True
51
Enzymes are a type of:
a) Carbohydrate
b) Protein
c) Lipid
d) Nucleic acid
Protein
52
Enzymes function as:
a) Catalysts
b) Energy sources
c) Structural components
d) Genetic material
Catalysts
53
The specific region of an enzyme where a substrate binds is called the:
a) Active site
b) Inactive site
c) Binding site
d) Substrate site
Active site
54
Enzymes increase the rate of chemical reactions by:
a) Decreasing temperature
b) Increasing pH
c) Lowering activation energy
d) Increasing substrate concentration
Lowering activation energy
55
Enzymes are highly specific in their catalytic activity due to:
a) Size
b) Shape
c) Charge
d) Temperature
Shape
56
The lock and key model and the induced fit model are two models used to explain:
a) Enzyme inhibition
b) Enzyme denaturation
c) Enzyme kinetics
d) Enzyme-substrate interaction
Enzyme-substrate interaction
57
Enzymes are usually named by adding the suffix:
a) "-ase"
b) "-ose"
c) "-ide"
d) "-ine"
"-ase"
58
Which of the following factors can affect enzyme activity?
a) Temperature
b) pH
c) Substrate concentration
d) All of the above
All of the above
59
Enzymes are commonly classified into several classes based on their:
a) Size
b) Shape
c) Function
d) Charge
Function
60
Enzyme activity can be regulated by:
a) Allosteric regulation
b) Competitive inhibition
c) Covalent modification
d) All of the above
All of the above
61
Enzymes are composed of ________________ chains.
Polypeptide
62
The ________________ is the substance on which an enzyme acts.
Substrate
63
Enzymes can be denatured by extreme ________________ and pH.
Temperature
64
Enzymes are reusable and can catalyze ________________ reactions.
Multiple
65
Enzymes can be affected by ________________ and non-competitive inhibitors.
Competitive
66
Enzymes can only catalyze reactions in one direction. True or false?
False
67
Enzymes are consumed during the catalytic process. True or false?
False
68
Enzymes function optimally at any pH value. True or false?
False
69
Enzymes are specific to one type of substrate. True or false?
True
70
Enzymes can function under extreme temperature conditions. True or false?
False
71
Enzymes are classified as:
a) Organic compounds
b) Inorganic compounds
c) Macromolecules
d) Small molecules
Macromolecules
72
The activity of enzymes can be influenced by:
a) Temperature
b) pH
c) Inhibitors
d) All of the above
All of the above
73
Enzymes work by:
a) Increasing the concentration of reactants
b) Lowering the activation energy
c) Increasing the concentration of products
d) Decreasing the rate of reaction
Lowering the activation energy
74
Enzymes function best within a specific:
a) pH range
b) Temperature range
c) Pressure range
d) Ionic strength range
pH range
75
Enzymes can be found in:
a) Animals
b) Plants
c) Microorganisms
d) All of the above
All of the above
76
Enzymes increase the rate of chemical reactions by lowering the ________________.
Activation energy
77
The reactant that an enzyme acts upon is known as the ________________.
Substrate
78
Enzymes can be inhibited by the binding of ________________ to the active site.
Inhibitors
79
The study of enzymes is known as ________________.
Enzymology
80
Enzymes are involved in various biological processes such as ________________ and metabolism.
Digestion
81
Activation energy is:
a) The energy required for an enzyme to function
b) The energy required to start a chemical reaction
c) The energy released during a chemical reaction
d) The energy stored in an enzyme
The energy required to start a chemical reaction
82
The transition state in a chemical reaction is:
a) The state where reactants are at their highest energy level
b) The state where reactants are at their lowest energy level
c) The state where products are at their highest energy level
d) The state where products are at their lowest energy level
The state where reactants are at their highest energy level
83
Chymotrypsin is an example of a:
a) Lipase
b) Protease
c) Amylase
d) Polymerase
Protease
84
Prosthetic groups are:
a) Small inorganic molecules required for enzyme activity
b) Small organic molecules required for enzyme activity
c) Large protein components of enzymes
d) Active sites on enzymes
Small organic molecules required for enzyme activity
85
Coenzymes are:
a) Non-protein organic molecules required for enzyme activity
b) Small inorganic molecules required for enzyme activity
c) Large protein components of enzymes
d) Active sites on enzymes
Non-protein organic molecules required for enzyme activity
86
Cofactors are:
a) Non-protein organic molecules required for enzyme activity
b) Small inorganic molecules required for enzyme activity
c) Large protein components of enzymes
d) Active sites on enzymes
Small inorganic molecules required for enzyme activity
87
Allosteric regulation is:
a) The regulation of enzyme activity by binding of a molecule at a site other than the active site
b) The regulation of enzyme activity by binding of a molecule at the active site
c) The regulation of enzyme activity by changes in temperature
d) The regulation of enzyme activity by changes in pH
The regulation of enzyme activity by binding of a molecule at a site other than the active site
88
Phosphorylation is:
a) The addition of a phosphate group to an enzyme or substrate
b) The removal of a phosphate group from an enzyme or substrate
c) The process of converting an enzyme into an inactive form
d) The process of converting an enzyme into an active form
The addition of a phosphate group to an enzyme or substrate
89
An enzyme that requires a metal ion as a cofactor is called a:
a) Metalloenzyme
b) Prosthetic enzyme
c) Coenzyme
d) Holoenzyme
Metalloenzyme
90
Which of the following is an example of an allosteric enzyme?
a) Hexokinase
b) Chymotrypsin
c) Catalase
d) DNA polymerase
Catalase
91
Enzymes lower the activation energy of a chemical reaction by ________________ the transition state.
Stabilizing
92
Allosteric regulation can result in either ________________ or ________________ of enzyme activity.
Activation, inhibition
93
Enzymes are consumed during a chemical reaction and need to be replenished. True or false?
False
94
Enzymes increase the equilibrium constant of a chemical reaction. True or false?
False
95
Chymotrypsin is an enzyme involved in the digestion of carbohydrates. True or false?
False
96
Coenzymes are proteins required for enzyme activity. True or false?
False
97
Allosteric regulation can modulate enzyme activity to respond to cellular needs. True or false?
True
98
The active site of an enzyme is:
a) The region where the enzyme binds to the substrate
b) The region where allosteric regulators bind
c) The region responsible for cofactor binding
d) The region involved in catalysis
The region involved in catalysis
99
The pH at which an enzyme exhibits maximum activity is called the:
a) Optimal pH
b) Active pH
c) Substrate pH
d) Enzyme pH
Optimal pH
100
Enzyme-substrate specificity is determined by:
a) The shape of the enzyme
b) The charge of the enzyme
c) The size of the enzyme
d) The temperature of the enzyme
The shape of the enzyme
101
Competitive inhibitors bind to the ________________ of an enzyme.
a) Active site
b) Allosteric site
c) Cofactor site
d) Transition state
Active site
102
Phosphorylation is a common post-translational modification that can regulate enzyme activity by adding a ________________ group.
Phosphate
103
The induced fit model of enzyme-substrate interaction suggests that:
a) Enzymes and substrates have a perfect fit at the active site.
b) Enzymes undergo conformational changes upon substrate binding.
c) Enzymes are rigid structures that do not change shape.
d) Enzymes and substrates interact through non-specific electrostatic interactions.
Enzymes undergo conformational changes upon substrate binding.
104
According to the induced fit model, the active site of an enzyme:
a) Remains unchanged during the catalytic process.
b) Only binds to substrates of a specific size and shape.
c) Adapts its shape to accommodate the substrate.
d) Binds to the substrate irreversibly.
Adapts its shape to accommodate the substrate.
105
Phenylketonuria (PKU) is a genetic disorder that affects the metabolism of:
a) Carbohydrates
b) Proteins
c) Fats
d) Nucleic acids
Proteins
106
Phenylketonuria is caused by a deficiency in the enzyme:
a) Phenylalanine synthase
b) Phenylalanine hydroxylase
c) Phenylalanine deaminase
d) Phenylalanine oxidase
Phenylalanine hydroxylase
107
In Phenylketonuria, the accumulation of phenylalanine in the body can lead to:
a) Brain damage
b) Heart disease
c) Liver failure
d) Kidney dysfunction
Brain damage
108
Phenylketonuria can be diagnosed through:
a) Genetic testing
b) Blood tests
c) Urine tests
d) All of the above
All of the above
109
The primary treatment for Phenylketonuria is:
a) Restricting dietary intake of phenylalanine
b) Increasing dietary intake of phenylalanine
c) Supplementation with phenylalanine hydroxylase
d) None of the above
Restricting dietary intake of phenylalanine
110
The induced fit model suggests that the active site of an enzyme undergoes ________________ changes upon substrate binding.
Conformational
111
The basic structural and functional unit of life is the:
a) Tissue
b) Organ
c) Cell
d) Organ system
Cell
112
Which of the following is not considered an organelle?
a) Mitochondria
b) Golgi apparatus
c) Nucleus
d) Ribosome
Ribosome
113
The "powerhouse" of the cell, responsible for generating energy, is the:
a) Nucleus
b) Golgi apparatus
c) Mitochondria
d) Endoplasmic reticulum
Mitochondria
114
Which organelle is responsible for protein synthesis?
a) Nucleus
b) Ribosome
c) Lysosome
d) Vacuole
Ribosome
115
The organelle that stores genetic material and controls cellular activities is the:
a) Nucleus
b) Chloroplast
c) Endoplasmic reticulum
d) Centriole
Nucleus
116
The majority of the cell membrane is composed of:
a) Carbohydrates
b) Proteins
c) Lipids
d) Nucleic acids
Lipids
117
Which of the following is not a type of lipid found in the cell membrane?
a) Phospholipids
b) Cholesterol
c) Triglycerides
d) Glycolipids
Triglycerides
118
The cell membrane is primarily composed of a bilayer of:
a) Carbohydrates
b) Proteins
c) Lipids
d) Nucleic acids
Lipids
119
The function of the cell membrane is to:
a) Regulate the movement of substances into and out of the cell
b) Store genetic material
c) Produce energy
d) Synthesize proteins
Regulate the movement of substances into and out of the cell
120
The cell membrane is selectively permeable, allowing some substances to pass while restricting others. True or False?
True
121
The cell membrane is composed of a variety of ________________ and ________________ substances.
Organic, inorganic
122
________________ are the building blocks of proteins.
Amino acids
123
Carbohydrates play a role in cell recognition and cell-______________ interactions.
Adhesion
124
The cell membrane acts as a barrier between the cell's ________________ and its external environment.
Cytoplasm
125
The cell membrane is a rigid structure that does not allow flexibility. True or false?
False
126
Lipids are insoluble in water. True or false?
True
127
Proteins are the primary components of the cell membrane. True or false?
True
128
Carbohydrates are only found in the cytoplasm of the cell. True or false?
False
129
The cell membrane is responsible for maintaining the shape of the cell. True or false?
True
130
The organelle responsible for detoxification and lipid metabolism in the cell is the:
a) Mitochondria
b) Lysosome
c) Peroxisome
d) Vacuole
Peroxisome
131
Which organelle is responsible for packaging and sorting proteins for transport within the cell?
a) Golgi apparatus
b) Endoplasmic reticulum
c) Nucleus
d) Chloroplast
Golgi apparatus
132
The cytoskeleton provides structural support and helps with cell movement. True or false?
True
133
The ________________ is a network of protein fibers that maintains cell shape and assists in cell movement.
Cytoskeleton
134
The fluid mosaic model describes the cell membrane as:
a) A rigid and immovable structure
b) A mosaic of carbohydrates and lipids
c) A dynamic and fluid structure with embedded proteins
d) A model of fluid motion within the cytoplasm
A dynamic and fluid structure with embedded proteins
135
_____________ is a field of biology that has practical applications in medicine, health care and laboratory diagnostics.
Medical biology
136
________ is NOT a branch of Medical Biology?
a) Biophysics
b) Statistics
c) Biochemistry
d) Embryology
Statistics
137
The branch of biology that studies the structure, function, and behavior of cells is called?
Cytology
138
An organelle is a specialized subunit, usually within a cell, that has a specific function. True or false?
True
139
What are the two types of organelles?
1. Membrane bound
2. Non-membrane bound
140
_________ has the highest percentage in cell composition.
Water (70%)
141
Hydrophilic means _________
Water loving
142
Hydrophobic means ________
Water fearing
143
Membranous proteins can function as:
a) Enzymes
b) Transporters
c) Receptors
d) All of the above
All of the above
144
Which type of membranous protein aids in cell-cell communication?
a) Enzymes
b) Transporters
c) Receptors
d) Anchoring proteins
Receptors
145
The cell membrane is selectively permeable, meaning it:
a) Allows any substance to freely pass through
b) Allows only small molecules to pass through
c) Allows only water molecules to pass through
d) Allows certain substances to pass while restricting others
Allows certain substances to pass while restricting others
146
Which of the following molecules can directly diffuse through the cell membrane?
a) Glucose
b) Sodium ions
c) Oxygen
d) Proteins
Oxygen
147
The cell membrane is impermeable and does not allow any molecules to pass through. True or false?
False
148
The movement of water across a selectively permeable membrane is known as:
a) Active transport
b) Facilitated diffusion
c) Osmosis
d) Exocytosis
Osmosis
149
Membrane transport channels facilitate the movement of ions or molecules by:
a) Active transport
b) Endocytosis
c) Passive diffusion
d) Facilitated diffusion
Facilitated diffusion
150
Which of the following is an example of a passive transport mechanism?
a) Active transport
b) Endocytosis
c) Facilitated diffusion
d) Phagocytosis
Facilitated diffusion
151
Membrane transport channels are specific to certain molecules or ions. True or false?
True
152
The fluid mosaic model suggests that the cell membrane is composed of a ________________ bilayer.
Phospholipid
153
Membranous proteins are embedded within the lipid bilayer and can span the entire ________________ of the membrane.
Thickness
154
The selective permeability of the cell membrane allows for the regulation of ________________ composition within the cell.
Ion
155
Osmosis is the movement of water across a selectively permeable membrane from an area of ________________ concentration to an area of lower concentration.
Higher
156
Membrane transport channels act as ________________ for the movement of specific molecules or ions across the cell membrane.
Pathways
157
The fluid mosaic model describes the cell membrane as a static and unchanging structure. True or false?
False
158
Membranous proteins are only involved in enzymatic reactions. True or false?
False
159
The cell membrane is freely permeable to all substances. True or false?
False
160
Osmosis requires the expenditure of energy by the cell. True or false?
False
161
Membrane transport channels assist in the movement of substances across the cell membrane. True or false?
True
162
Which of the following is an example of active transport?
a) Facilitated diffusion
b) Osmosis
c) Sodium-potassium pump
d) Simple diffusion
Sodium-potassium pump
163
Endocytosis is a cellular process that involves:
a) Movement of molecules out of the cell
b) Movement of molecules into the cell
c) Breakdown of cellular waste
d) Synthesis of proteins
Movement of molecules into the cell
164
Pinocytosis is a form of endocytosis that involves:
a) Engulfing large solid particles
b) Engulfing liquid droplets
c) Engulfing bacteria
d) Engulfing oxygen molecules
Engulfing liquid droplets
165
Phagocytosis is a form of endocytosis that involves:
a) Engulfing large solid particles
b) Engulfing liquid droplets
c) Engulfing bacteria
d) Engulfing oxygen molecules
Engulfing large solid particles
166
The cellular organelle that contains the genetic material and controls cell activities is the:
a) Endoplasmic reticulum
b) Golgi apparatus
c) Nucleus
d) Lysosome
Nucleus
167
The nucleolus is a substructure within the nucleus that is responsible for:
a) Protein synthesis
b) Lipid metabolism
c) Ribosome assembly
d) ATP production
Ribosome assembly
168
The nuclear pore complex is responsible for:
a) Regulating the movement of substances into and out of the nucleus
b) Synthesizing proteins
c) Breaking down cellular waste
d) Generating energy
Regulating the movement of substances into and out of the nucleus
169
Karyopherins are proteins involved in:
a) Endocytosis
b) Phagocytosis
c) Nucleus structure
d) Nuclear transport
Nuclear transport
170
Endocytosis is an active process that requires energy expenditure by the cell. True or False?
True
171
Pinocytosis primarily involves the uptake of:
a) Large particles
b) Small molecules
c) Bacteria
d) Oxygen molecules
Small molecules
172
Phagocytosis is mainly performed by:
a) Animal cells
b) Plant cells
c) Bacterial cells
d) Fungal cells
Animal cells
173
The ________________ is a membrane-bound organelle that houses the genetic material in eukaryotic cells.
Nucleus
174
The ________________ is a region within the nucleus where ribosomes are assembled.
Nucleolus
175
The ________________ is a complex structure that regulates the passage of molecules in and out of the nucleus.
Nuclear pore complex
176
________________ are proteins involved in the transport of molecules into and out of the nucleus.
Karyopherins
177
During endocytosis, the plasma membrane forms a ________________ around the engulfed materials.
Vesicle
178
Endocytosis is a process that occurs in both prokaryotic and eukaryotic cells. True or false?
False
179
Phagocytosis is primarily performed by immune cells to engulf and destroy foreign particles. True or false?
True
180
The nucleus is surrounded by a double-layered membrane called the nuclear envelope. True or false?
True
181
The nucleolus is responsible for the synthesis of proteins. True or false?
False
182
The nuclear pore complex controls the movement of substances between the nucleus and the cytoplasm. True or false?
True
183
The process of pinocytosis is also known as:
a) Cell division
b) Cell drinking
c) Cell respiration
d) Cell excretion
Cell drinking
184
Phagocytosis is an important process for:
a) Cell growth
b) Cellular communication
c) Cellular digestion
d) Cellular respiration
Cellular digestion
185
The nuclear envelope is composed of:
a) Phospholipid bilayer
b) Carbohydrate chains
c) Protein fibers
d) Cholesterol molecules
Phospholipid bilayer
186
The nucleolus is involved in the production of:
a) ATP
b) DNA
c) RNA
d) Lipids
RNA
187
The nuclear pore complex allows the free diffusion of molecules into and out of the nucleus. True or False?
False
188
Pinocytosis involves the formation of small ________________ that contain dissolved molecules.
Vesicles
189
Phagocytosis is primarily performed by specialized cells called ________________.
Phagocytes
190
The nuclear pore complex is composed of proteins called ________________.
Nucleoporins
191
Karyopherins mediate the transport of ________________ and ________________ between the nucleus and the cytoplasm.
Proteins, nucleic acids
192
Endocytosis is a mechanism for cells to obtain nutrients from the extracellular environment. True or false?
True
193
Pinocytosis involves the engulfment of large particles by the cell. True or false?
False
194
The nucleolus plays a role in the assembly of ribosomes. True or false?
True
195
The nuclear pore complex allows the unregulated passage of molecules in and out of the nucleus. True or false?
False
196
Karyopherins are involved in the transport of molecules across the cell membrane. True or false?
False
197
NLS (nuclear localization signal) is recognized by nuclear transport receptors called ____________.
Importins
198
Nuclear Pore Complexes are made of 30 different pore proteins called ____________.
Nucleoporins
199
Nuclear membrane contains ______ number of layers.
4
200
Selective uptake of very specific macromolecules is called Receptor-Mediated Endocytosis. True or false?
True
