You are interested in studying human ß-globin and decide to produce the protein in bacterial cells. the ß-globin gene is a relatively simple gene with a single intron. you insert the entire gene, including the gene's promoter, in a plasmid and transform the recombinant plasmid into e. coli. you are disappointed to discover that your bacterial culture does not produce the correct protein. what are some possible explanations? (select all that apply.) a) the bacterial cell is missing rna polymerase. b) the bacterial cell produces the protein but it is rapidly degraded. c) the bacterial cell cannot splice introns. d) the bacterial cell does not recognize the eukaryote promoter. b, c, and d

the level of progesterone is low at the pre-ovulatory phase of the cycle but it gradually increases and the levels are high at the luteal phase. if pregnancy occurs, the level of progesterone will be high throughout the pregnancy.

if egg is fertilized and the mother gets pregnant, progesterone starts preparing the uterus for the implantation. it starts building up the lining of uterus and make it hostile of the period of pregnancy.

a researcher conducts an experiment on the secretion of a particular hormone in mice. scientists inject mice with a substance that stimulates the production of the hormone. the scientists then test the levels of hormones produced by the mice. the tool used to measure the hormones consistently detects the levels at 10 points lower than the actual hormone levels in the mice. this tool makes measurements, but the measurements aren't .

explanation:

no u

c. heat from the poles back down towards the equator.