ASU Bio 181 Exam- 2 Questions With 100% Correct Answers.

90% of absorption in the intestine occurs where? - In the Ileum and Jejunum Adhering junctions are based on two different types of cytoskeleton filament systems. Name those systems. - Actin Filament based, Intermediate filament based Assume that you have a eukaryotic cell with three chromosomes within it. How many 5' ends would there be? - Gap 1: 6, Gap 2: 12 Does gravity have a role in some part of the lymphatic fluid flow back to the circulatory system? - Yes Draw concentric circles and label the four layers of the gut. Also label the hole at the inner most circle. List what is in these four layers. - Draw the sugar in DNA and label the carbons as discussed in the lecture. Then circle the carbon that is different in RNA. - During DNA replication in the lagging strand there is production of this component? - Okazaki fragment During mRNA maturation what is the name of the part of the mRNA that is removed? - Intron For DNA Polymerase III to work which of these components has to act first? - Primase For DNA Polymerase III to work, which of these components has to act first? - Primase Glycolysis requires the investment of two_________ in order to obtain a gross output of four ________ . - ATP, ATPHow does the lymph fluid return from the legs to the circulatory system? - A one way valve pushing it up, with the help of muscles contracting around it. How does the pancreas neutralize the pH of the chyme that comes from the stomach? - Bicarbonate Ion Secretions How many "stop" codons exist? - Three How many hydrogen bonds are there between an A and its paired nucleotide? - Two If a macrophage endocytoses (i.e., eats) an antigen it can digest it and present it on a ______________ Major histocompatibility complex protein to a ______________. - Class II, Helper T Cell In DNA, what does the nucleotide labeled as A pair with? - Thymidine which is a pyrimidine In eukaryotic cells the start codon for protein synthesis is . - AUG or Methionine