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Biology 1 exam 4 study
Terms in this set (46)
Muscle stem cells can differentiate to form only muscle. Based on this information, what is the potency of muscle stem cells?
Mesenchymal stem cells (MSCs) can differentiate to form bone, cartilage, fat, and connective. Based on this information, what is the potency MSCS ?
Which of the following is a proto-oncogene?
B lymphocyten protein complexes during un that help the host fight patlagernas and modulate the overall response.What are these complexes know as?
A doctor's office out of the latest flu many patients asking for it. One of the nurses finds some vials from last years batch in the refrigerator. Should they use it ?
No, because each year the vaccine is made against different subtypes of the flu virus.
In influenza nomenclature, H1N1 refers to:
Hemagglutinin and neuraminidase variants
Viruses are completely dependent on the host because they cannot
Which of the following statements is true?
Antigenic shifts of viral surface proteins can occur when an influenza virus passes from bird to pig to human
According to the Baltimore classification, viruses are classified by
The type of genetic material
Viruses surround their nucleic acids with a(n)_, whose function is to _
Capsid; protect their nucleic acids
What is (are) the source(s) of the membrane in enveloped viruses?
The cell plasma membrane or membranes from endogenous organelles
From the options below select the one specific characteristics of the adaptive immunity?
Exhibit antigen-specific recognition
Viruses usually infect specific host cells: this phenomenon is known as tropism. However, in order to infect the correct cell(s), viruses must
Have the correct receptors to recognize specific cells
Typically, the host response faster and stronger for a sccond by same pathogen. This is due to the development of what cells the first or primary infection?
Which of the following is found in some viruses, often derived by budding from lipid membranes of infected cells?
What cell type is infected by Human Immunodeficiency Virus (HIV)?
The profile undergoes temporal changes during a given infection. Which of the following profiles indicates characteristic production during the from early to late infection?
IgM to IdG
Mutations in genes encoding tumor suppressors do which of the following?
Inactivate tumor suppressor function leading to cancer
The shows a tumor relative to the basement membrane. Based on this image, which of the following statements regarding the depicted tumor is CORRECT ?
The tumor is benign, because the tumor cells are NOT leaving the tissue
Which of the following statements regarding zygotes is CORRECT ?
Zygotes are totipotent, because they can form every cell of the body and the placenta.
Which of the following statements regarding the uses of embryonic stem cells is INCORRECT?
Embryonic stem cells are useful for studying normal differentiation to form the entire placenta.
How do bacterial populations become resistant to antibiotics?
If the frequency of a recessive allele in a population at Hardy Weinberg equilibrium is 0.90, what is the frequency of the dominant allele?
What homologous trait do amphibians, birds, and humans possess?
In the figure below, what is the frequency of the recessive allele?
In a hypothetical population at Hardy-Weinberg equilibrium the following genotype frequencies are observed: f(AA) = 0.40; f(Aa) = 0.20; f(aa) = 0.40 What is the frequency of the dominant allele in this population?
Which of the following conclusions fit with the experimental data shown below ?
Drab-colored guppies survived the best with predators
Organisms often possess similar traits, but are not closely related to each other. What evolutionary phenomenon describes these situations?
What happens when a horse and a donkey attempt to mate?
The produce sterile offspring
Which guppy is most fit?
Why do giraffes have long necks?
Sexual selection favors long neck size for male-male competitive success.
What type of speciation is involved with divergence and isolation between apple maggot fly groups?
Which of the following is not an inference of Darwin's theory of evolution by natural selection?
Offspring inherit trait values that parents acquire during their lifetimes
The frequency of the heterozygous genotype in a population at Hardy-Weinberg equilibrium is equal to
Two times the frequency of the dominant allele times the frequency of the recessive allele.
In the figure below, beak size from a population of medium ground finches in the Galapagos Islands was monitored. What pattern of selection best describes the influences on beak size over time ?
In a system of four species of frogs, each of the groups occasionally interbreeds with each other, yet each species maintains a unique gene pool and separate evolutionary trajectory. These groups would best be called separate species using the _ species concept.
What is the purpose for sequencing both the healthy cells and the tumor cells of cancer patients?
To identify patient specific driver mutations for the design of personalized drug therapy
Which of the following represents a significant advantage of using patient specific pluripotent stem cells created by Induced Pluripotent Stem generation to treat disease
These cells are identical to the patient and will not be recognized by the patient's immune system.
Embryonic stem cells are isolated from which of the following places?
The inner cell mass of the blastocyst
Which of the following CORRECTLY explains the ethical controversy related to isolation and use of human embryonic stem cells?
Isolation of human embryonic stem cells requires the destruction of human blastocysts
How does the mutation of a gene encoding a growth factor receptor induce tumor formation?
Activating mutations of the growth factor receptor promote cell growth that is Independent of the presence of the growth factor
Which of the following statements regarding cell signaling pathways that control cell proliferation is CORRECT?
These signaling pathways can be used to promote normal cell growth
Which of the following is a difference between therapeutic cloning and reproductive cloning?
Therapeutic cloning uses somatic cell nuclear transfer to create patient specific pluripotent stem cells.
Which of the following statements regarding the definition of a stem cell CORRECT?
A stem cell must demonstrate both self-renewal and potency
The state of Texas made it to clone deer for commercial purposes. Which of the following procedures banned in Texas for commercial deer production ?
Culture of primordial germ cells
Based on what you know about proto-oncogenes, which of the following statements is most likely CORRECT?
Mutations in Porto-oncogenes are more likely to be driver mutations
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