Gen Biology 1 & Lab final exam-EMCC| 121 QUESTIONS WITH COMPLETE SOLUTIONS

Life is thought to have evolved from complex molecules formed by the interaction of smaller molecules in oceans and the atmosphere. The substance which brought these molecules together to interact is correct answer: Water Consider the following electronegativity values: Boron (B) = 1.8 Carbon (C) = 2.5 Chlorine (Cl) = 3.2 Selenium (Se) = 2.6 Which of the following bonds is the most polar? correct answer: B-Cl When atoms gain or lose electrons, they become negatively or positively charged. These negatively or positively charged atoms are known as correct answer: ions Science is subdivided into specific areas of study termed disciplines. These divisions are artificial but are helpful to narrow the massive scope of scientific knowledge to a manageable amount. Given what you know about each, which scientific division is likely to present the best answer to a question about how fluid dynamics affect blood pressure in mammals? correct answer: Biophysics- study of biological processes through physics Organisms are composed of molecules, which are collections of smaller units, termed: correct answer: Atoms The term that Darwin used to describe the concept that those with superior physical, behavior or other attributes are more likely to survive than those that are not so well endowed, and thus are more likely to pass their traits to the next generation, is called: correct answer: Natural selection The DNA sequence capable of pairing with 5' CGATTAGT 3' is: correct answer: 3' GCTAATCA 5' Denaturation disrupts the secondary and tertiary structure of proteins. However, denaturation is not strong enough to disrupt what interaction that is relevant to protein structure? correct answer: Peptide bonds Carbohydrates are composed of: correct answer: Monosaccharides A nucleic acid containing 32% thymine would contain how much cytosine : correct answer: 18% Which atomic particle has no charge and is located in the nucleus? correct answer: Neutron