Mcat Biochemistry Review Study Guide Questions And Correct Answers

Embedded Proteins {Ans: Associated with the interior (cytoplasmic) or exterior (extracellular) surface of the cell membrane}Transgenic Mice {Ans: Mice whose germ line has been altered by introducing a cloned gene into fertilized ova or into embryonic stem cells}Lipoprotein {Ans: The transport mechanism for lipids within the circulatory and lymphatic systems; includes chylomicrons (least dense; highest fat-to-protein ratio) and VLDL (very low density), which transport triacylglycerols; and HDL (high density), IDL (intermediate density), and LDL (low density), which transport cholesterol and cholesteryl esters}Centromeres {Ans: Region of DNA found in the center of chromosomes Form noticeable indentations Composed of heterochromatin Contain high C-G content and repeating sequences Sister chromatids can remain connected during anaphase}Citrate Synthase {Ans: ATP and NADH function as allosteric inhibitors of citrate synthase Citrate and succinyl-CoA inhibit citrate synthase directly}DNA-Binding Domain {Ans: Part of transcription factors Binds to a specific nucleotide sequence in the promoter region or to a DNA response element to help recruit transcriptional machinery}