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Suppose you have a bacterium, which is normally killed in an hour when growing in a medium containing penicillin. This bacterium is an auxotroph and requires tryptophan for growth. When placed in a medium lacking both tryptophan and penicillin, the bacterium neither grows nor dies for several hours. Question: Is it killed in an hour in a medium lacking tryptophan but containing penicillin?
Explain why does vaccination provide long-term protection against a particular disease but passive immunization provides only temporary protection?
Describing how you would test the hypothesis. Start by examining the living species around you. Ever wonder why the pollinator is attracted to the particular flower.
The parasympathetic nervous division is central to maintaining homeostasis of the body. Pick one of the oxygen delivery organs and one of excretory or digestive organs.
If tacrine was given to a person, can you explain what would happen to levels of acetylcholine in the heart, skeletal muscles, and brain?
You are designing a new single-celled organism. Discuss the problems of size, getting molecules like nutrients and wastes in and out, temperature, energy and replication of genetic materials.
Biological recognition is significant in many processes explain how the process of recognition occurs while an organism recognizes other members of their own species.
Suppose i f an individual with genotype pQ/Pq heterozygous for both loci in trans arrangement of alleles is crossed with an individual of genotype PQ/pq.
Using a five step protocol, you have purified an enzyme to the point where the specific activity remains constant when you perform any additional purification steps.
The following reaction is part of electron transport chain. Fill the reaction and identify which species is reduced. The abbreviation FMN represents flavin mononucleotide.
How may you use site-directed mutagenesis to determine whether this residue is essential for proton conduction?
Assume if you want to rid an experimental organism of the function of a gene, you can use RNAi. What would you inject into the organism?
Carp are freshwater fish that thrive in stagnant-water habitats. The partial pressure of oxygen in stagnant water is low compared to moving water.
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