ASU BIO 101: EXAM 2 QUESTIONS AND ANSWERS.

ASU BIO 101: EXAM 2 QUESTIONS AND ANSWERS. 90% of absorption in the intestine occurs where? - Answer-The jejunum and the ileum A bacterium coated by antibodies is a signal that a macrophage should endocytose (eat) it - Answer-true Adhering junctions are based on two different types of cytoskeleton filament systems. Name those systems. - Answer-Actin Filament System Intermediate Filament System Any cell can present an antigen on a class I major histocompatibility complex (MHC) protein. - Answer-true Any cell can present an antigen on a class II major histocompatibility complex (MHC) protein. - Answer-False Assume that you have a eukaryotic cell with three chromosomes within it. How many 5' ends would there be? - Answer-Gap 1: 6 Gap 2: 12 B and T cells are called lymphocytes - Answer-true Bone marrow is a site where mature immune cells are found. - Answer-false DNA replication in eukaryotes is sped up by multiple origins of replication. - Answer-true Does gravity have a role in some part of the lymphatic fluid flow back to the circulatory system? - Answer-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. - Answer- Draw the sugar in DNA and label the carbons as discussed in the lecture. Then circle the carbon that is different in RNA. - Answer- During DNA replication in the lagging strand there is production of this component? - Answer-Okazaki fragment During DNA replication is greatly reduced by enzymes that proof read the newly replicated DNA. - Answer-True During mRNA maturation what is the name of the part of the mRNA that is removed? - Answer-introns