Bio 256 Practice Exam Questions with Correct Answers

Bio 256 Practice Exam Questions with Correct Answers Which is NOT a function of proteins? - Answer-Provides genetic code Which contains your genetic inheritance from your parents? - Answer-DNA RNA is made by ____, protein in made by ____ - Answer-transcription, translation The RNA type that moves through nuclear pores to direct synthesis of new protein molecules at the ribosomes in the cytoplasm, is - Answer-mRNA Transfer RNA anticodons pair complimentary to the ___ of mRNA. - Answer-codons If you see polyribosomes when you observe a cell using an electron microscope, the cell - Answer-is making a lot of a certain protein. Which is NOT a reason why you and your cells age? - Answer-genes shorten until they no longer function. Which best describes the membranes of your cells? - Answer-phospholipid bilayers with embedded proteins and cholesterol. The rate of an enzymatic reaction increases as the temperature rises up to a point. Above 40 degrees C or so, however, the reaction rate begins to decline because - Answer-enzymes change shapes at higher temperatures How can defects in the same metabolic pathway result in different symptoms in different individuals? - Answer-Different enzymes may be defective in the same metabolic pathway, resulting in different diseases. An oxidation reaction must be coupled to a - Answer-reduction reaction. When glucose is catabolized under ____ conditions, pyruvates will lose a carbon. Then the acetate made will cross the mitochondrial wall and enter Krebs cycle. - Answer-aerobic. To obtain metabolic energy from glycogen, you must first - Answer-break the molecule into glucose units When cells move substances in vesicles into extracellular space, it is called - Answer-exocytosis red blood cells placed in hypotonic solution will exhibit - Answer-hemolysis Your blood sugar is - Answer-glucose what happens during the S phase of the cell cycle? - Answer-The synthesis of DNA, as well as normal cell activities. During RNA processing, certain regions of the pre-RNA are spliced together to create the mature RNA strand. These are called: - Answer-exons. Transcribe the following DNA antisense sequence: 3'-ATG-GAG-CAT-TTA-5' - Answer-5'-UAC-CUC-GUA-AAU-3' Most often, the integrating center in a feedback loop will be located within the - Answer-central nervous system