Biology 121 Final Exam | 2023/24

Biology 121 Final Exam | 2023/24 What is the hierarchy of life from largest to smallest? - Biosphere-Ecosystem-Community-Population-Organism-Organ system-Organ-Tissue-Cells-Organelle-Molecule-Atom A current example of natural selection is - The bacteria that has become drug resistant The usual process for the scientific method is: - Observation-question-hypothesis-prediction-experiment-results-conclusion Starch is a reserve polysaccharide made up of _____ subunits - Gluclose Monosaccharides are to polysacharides as ______ are to _______ - Amino acids; proteins All organic molecules contain: - Carbon In polar covalent bonding, electrons are ______ ______ between two atoms - shared unequally I have an element alpha with an atomic number of 10 and I have another element beta with the same number of protons but has 3 more neutrons than alpha. What is the atomic number of beta? - 10 What organelles are involved in energy conversion? - Mitochondrion and chloroplast Two molecules contain the exact same elements but are arranged differently what is this called? - Isomer Why is one side of a water molecule practically negative while the other side is practically positive? - Uneven sharing of electron pairs occurs due to the strong pull of oxygen. Looking at the reaction above what type of reaction forms a triglyceride? - Dehydration synthesis reactions Which of the following dietary fats is considered to be the healthiest? - Unsaturated cis fat The structure of cholesterol is similar to the structure of: - Sex hormones The graph is showing the differences in _____ between a chemical reaction with and without enzymes - Activation energy Which structure selectively regulates the transport of substances into and out of a planet cell? - The plasma membrane What is the role of the protein component of chromatin? - Something small and charged, like Mg ion You have two beakers in front of you labled A and B. One beaker contains Sodium Chloride and the other contains crystalized triglyceride. You cannot tell them visually apart. You then take a subsample from beaker A and place it in water. The substance dissolves. The substance in Beaker B does not dissolve which beaker contains salt? - Beaker A You just got a job at a blood bank and you are adding a chemical to preserve the blood. After a few bags you notice the blood changing color and separating. You take a subsample of a treated sample and look under a microscope. You see that the red blood cells have either exploded or are shaped like a fat balloon that is going to pop. The solution that the blood cells are in is probably what? - Hypotonic What is ATP? - An energy molecule What are enzymes? - A type of protein that lowers activation energy of a reaction In every conversion of energy a portion is lost to environment in what form? - Heat energy The O2 produced by photosynthesis originates from what reactant? - H2O What are the three stages of aerobic cellular respiration? - Glycolysis, citric acid cycle, and the electron transport chain In what part of anaerobic respiration is oxygen consumed? - Does not consume oxygen A new pesticide kills plants by stopping the ability of ADP to bond with a phosphate. Should their be a warning on the product? - Yes, there should be because this is the major energy unit for all life Alcohol is a waste product produced by yeast in the presence of sugar and the absence of what? - O2 The CO2 that humans breathe out is similar to the CO2 plants produce in that: - It comes from the same citric acid cycle and occurs in the mitochondria Which arrow would be most closely related to the least organized form of energy? - Arrow D, heat radiating from the chameleon