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Many infectious diseases are becoming difficult to treat because of bacterial resistance to antibiotics. Populations of bacteria can become resistant when they are exposed to an antibiotic. What is the best general explanation for how this occurs?
a) The antibiotic induces specific mutations in some of the bacteria that make them antibiotic-resistant.b) The antibiotic activates bacterial genes encoding enzymes that can destroy the antibiotic.c) The antibiotic increases the bacterial mutation rate, so that resistant mutant bacteria are more likely to arise.d) Antibiotic-resistant mutant bacteria already present in the population survive and reproduce in the presence of the antibiotic.
The reactions of glycolysis are catalyzed by enzymes and obviously proceed without much problem. However, when we look at some of the individual steps, they have positive standard free energies. What are these steps and how does the process preven..
Some wines are marketed as "sparkling" wines. Sparkling wines are considered so because of a dissolved gas that makes them fizzy. Concern what you know about the procedure of respiration to explain the type and origin of this gas.
Can viruses evolve? Why or why not? a. No, only their hosts can evolve. b. Yes, their genetic make-up responds to natural selection. c. No, they are not alive. d. Yes, they are able to alter their genetic code directly in response to selection pre..
Explain what is meant through a negative feedback loop and how these work in terms of regulating a metabolic pathway. provide an example of a negative feedback loop in the glycolytic pathway.
An analyzer has two true breeding lines of rabbits, both of which are albino. Albinism is recessive in both lines. When the researcher crosses the rabbits,
Nearsightedness is dominant to normal vision and hazel eyes are dominant to blue eyes. A nearsighted woman with hazel eyes who is heterozygous for both traits marries a man with normal vision and hazel eyes.
How can you infer what type of volcano erupted in a given area based on type of volcanic deposits now found as layers of rock. What abnormality may underlie those conditions.
What sequence of nucleotide pairs in a Drosophila gene would encode the amino acid sequence met-trp-phe-trp-met (reading from the amino terminus to the carboxyl terminus).
A wild cherry tree has 5 pairs of chromosomes in its nucleus found in a cell in the vascular cambium. How many homologous pairs of chromosomes would be inside the microspore mother cell?
1. An inhibitory neurotransmitter released into a synaptic cleft would most likely bind to.
You are investigating YFP, a transcription factor that binds directly to DNA. You know that it recognizes the sequences.
Discover different ways to synthesize drugs to treat Myasthenia Gravis. Or how can we synthesize drugs to treat Myasthenia Gravis.
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