Biology, 18.10.2019 01:10 bonnysvalentine
Mutations in region b and region d give the same results - when either of these regions is mutated, the operon is expressed under all conditions (called constitutive expression). you hypothesize that region b is the operator region and that region d is the repressor protein. to test your hypothesis, you create two partial diploid lines by introducing a f' plasmid with a wild-type lac operon: strain 1: f' a+ b+ c+ d+ e+ / a+ b- c+ d+ e+ strain 2: f' a+ b+ c+ d+ e+ / a+ b+ c+ d- e+ what experimental results would be predicted by your hypothesis?
Answers: 3
Biology, 21.06.2019 17:00
The construction of phylogenetic trees is a mapping out the proposed divisions and common ancestors of all living species. traditionally, these trees have been built using morphological data, such as appearance and embryology. recently, it has been possible to construct these trees using molecular data. phylogenetic trees based on different types of information agree with each: that there is strong evidence of a real underlying common descent. this phylogenic tree is composed based on molecular data (rrna). what statements can we infer are true about the organisms throughout the tree? because the tree is rooted, all branches share a common ancestor. all organisms have some sort of cellular structure/organization. all eukaryotes evolved from bacteria. since the organisms contain rna, they share the same dna. if the organisms contain rna, the share the same four nitrogen bases.
Answers: 1
Biology, 21.06.2019 23:50
Which statement about the immune system is false? a. lymphocytes reduce inflammation, b. b cells remember specific pathogens. c. most white blood cells kill bacteria d. white blood cells are made in lymph nodes.
Answers: 1
Biology, 22.06.2019 03:30
The human genome project is devoted to mapping the general dna sequence of our species. this could lead to the development of new medicines, as well as the possibility of using gene therapy to treat certain diseases. however, there are some ethical issues surrounding the mapping of individual genomes. one concern is a) that your genes may change over time, making the project useless. b) that insurance companies could discriminate based on genetic make-up. c) that since this has never been done before, we should probably not do it now. d) that sequencing our individual genomes is so expensive, it is a counter-productive strategy.
Answers: 1
Mutations in region b and region d give the same results - when either of these regions is mutated,...
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