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You are studying the expression of a proto-oncogene in a cancer cell and comparing it to expression in a non-cancer cell. You have done experiments to detect the presence of the proto-oncogene (DNA), the messenger RNA, and the protein in both cell types. Both cells have two copies of the gene. The non-cancer cells contain no RNA and no protein corresponding to the gene, but the cancer cells have abundant RNA and protein corresponding to the gene. How can these observations be explained?A) by regulation of mRNA degradation onlyB) by transcriptional and translation regulationC) regulation by either transcription or mRNA degradationD) by transcriptional regulation only
Discuss the purpose of the immune system is to recognize foreign bodies and respond with the production of immune cells and proteins.
According to ABC model of floral development, which genes would be expressed in a showy ornamental flower with multiple sepals and petals but no stamens or carpels.
If there was mutation in a dna triplet that changed the first triplet from ctt to ctc, would that cause the problem with the resulting polypeptide.
Would a false positive from the reaction between the inoculating loop and hydrogen peroxide be caused by poor specificity or poor sensitivity of the test system? Explain.
In a population with two alleles, A and a, frequency of A is 0.2. Organisms that is homozygous for A die before reaching sexual maturity. In five generations, what will be the frequency of individuals aa with genotypes.
Assume that you have a 5000 bp double-stranded linear DNA molecule with a gap in one strand 500 nucleotides long, terminated with a 3'-OH group and a 5'-P group.
2-experimental varieties of strawberry are produced by crossing a hexaploid line that contains 48 chromosomes and a tetraploid line that contains thirty-two chromosomes.
Assume you are studying a microorganism from a hot spring that uses organic carbon as an energy and carbon source.
What is the gene order? What are map distances in recombination units?
Eukaryotic cells may divide through the process of mitosis or meiosis. In humans, mitosis generates new cells for growth and repair.
The structure of biological membranes is estimated primarily by the lipid bilayer but the specific functions of these membranes are carried out through proteins associated with the membrane.
In a population of desert bighorn sheep, a mutant recessive allele c has been discovered to cause curled coats in both males and females. The normal dominant allele C produces straight coats.
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