exam 2 Flashcards
B-lactamase is an enzyme for:
antibiotic resistance
In postzygotic isolation:
Hybrid offspring of mating between different species do not survive
If a body structure is on the dorsal axis, this tells us it is located:
on your back
Which of the following is true of evolution?
Populations evolve, NOT the individuals
Polyploidy means:
having more than two sets of chromosomes
which of the following represents the correct order of the steps of a PCR?
Denature, anneal, extend
Ti plasmid is used in research to genetically modify:
plants
in which of the following is bacteria obtaining naked (free floating) DNA from the environment?
transformation
Restriction enzymes (nucleases):
cut DNA
Bacterophages:
are viruses that infect bacteria
homeostasis or homeotic mutations in animals occur in which of the following genes ?
HOX genes
which of the following is true?
Endotoxins are usually more lethal than exotoxins
Exotoxins are usually more lethal than endotoxins
Exotoxins and endotoxins usually have the same level of lethality
Exotoxins are usually more lethal than endotoxins
A population of 1000 individuals
how would you calculate the observed dominant allele frequency in this population?
(700/1000)+(1/2)(200/1000)
which of the following infections includes endospores?
botulism
which of the following is an example of biofilms?
plaque
Antibiotics should be selectively toxic, which means:
Antibiotics should kill the pathogen without harming the host
When just the sick person is separated from the rest of the population to avoid spreading disease, we call this:
isolation
If a population is in Hardy Weinberg equilibrium, then the expected genotype frequencies are represented by which equation?
p^2+2pq+q^2-1
If a fly lands on your food and brushes off microbes onto the food, which then infect you, we call this transmission:
Mechanical Vector transmission
what is the main source behind evolution?
alleles
fitness is:
the ability to produce surviving fertile offspring
human hair and dog our are an example of:
homology
typology means:
organisms are unchanging
sympatric speciation occurs when:
populations are living in the same area
a phylogeny is:
the evolutionary history of a group of organisms
hair and lactation in the following tree are an example of:
synapomorphies
tetanus is an example of:
noncommunicable disease
food poisoning is an example of:
communicable disease
If a bacteria is called Bacillus, then:
it is rod shaped
Flagella are for:
movement
