The mouse gene consists of 1800 nucleotides. 600 of them are introns *. This fragment of the gene The coding part - the exon - contains 300 adenyl, 200 thymidyl, 100 guanyl nucleotides. Cytosine Determine the number of nucleotides, the percentage of nucleotides in DNA. Exon of DNA How many amino acids are in the protein synthesized from * (We do not count introns when calculating the number of amino acids, because introns non-coding regions, which are removed from the mRNA and do not participate in protein biosynthesis)

What do all macromolecules have in common with each other? oa. they all are formed from the same elements.ob. they all have major roles in cell membranesoc. they all act as catalysts in the body.od. they all have peptide bonds between carbon atoms.

Bisphenol a (often called bpa) is a chemical found in products that people use every day, from water bottles to food containers to children's toys. unfortunately, bpa leaches out of its many products and makes its way into our bodies. what are the health effects of bpa exposure? ongoing research is finding that elevated exposure to bpa can affect a wide variety of developmental and physiological processes, but one of the first studies of bpa's health effects came about because of a simple mistake in the lab. at a laboratory at case western reserve university in 1998, geneticist patricia hunt was making a routine check of her female lab mice. as she extracted and examined developing eggs from the ovaries, she began to wonder what had gone wrong. she noticed that many of the eggs showed problems with their chromosomes, and some had irregular amounts of genetic material, which can lead to miscarriages and birth defects in mammals. she learned that a lab assistant had mistakenly washed the plastic mouse cages and water bottles with a harsh soap, releasing bpa from the plastic. knowing that bpa is an endocrine disruptor, a chemical that can enter organisms and mimic hormones, hunt set out to discover whether it had adversely affected her mice.

Question#29: why does the tropical ocean have a greater temperature range than the temperate ocean?