Biology 189 Exam 1 Review Questions with Answers, Exams of Biology

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Biology 189 Exam 1 Review-Questions

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What is the first step of the scientific method? - Correct answer making an observation What is the name for the condition that is manipulated in an experiment? - Correct answer Independent variable What method of study is used to account for the placebo effect? - Correct answer Blind Study Why is it important to have a falsifiable hypothesis? - Correct answer Science advances by the rejection of hypotheses What is the filing drawer phenomenon? - Correct answer Incorrect hypotheses do not get published What are the three subatomic particles? - Correct answer proton, neutron, and electron What are an atom's outermost electrons called? - Correct answer valence electrons An atom has the atomic number 16 and atomic mass of 32. How many electrons does it have? - Correct answer 16 Carbon (E.N. 2.5) bonds with Oxygen (E.N. 3.5). What type of bond results? - Correct answer Polar covalent What type of bonds are responsible for cohesion of water? - Correct answer Hydrogen bonds What are the 4 categories of biological macromolecules? - Correct answer Carbohydrates, Lipids, Proteins, Nucleic Acids A fatty acid containing no double bonds in its hydrocarbon tail is called... - Correct answer Saturated What part of an amino acid differs from one amino acid to another? - Correct answer The R group/ side chain What is the difference between purines and pyrimidine’s? - Correct answer Purines have two rings; Pyrimidine’s have one

What level of protein structure results from the interaction between multiple polypeptides? - Correct answer Quaternary structure What organelle is responsible for protein synthesis? - Correct answer Ribosomes What type of proteins are found on the inside or outside of the cell membrane? - Correct answer Peripheral proteins In what part of a cell are the ribosomes produced? - Correct answer Nucleolus What are the differences between plant and animal cells? - Correct answer Cell wall, vacuole, and chloroplasts In an _______ environment, water will flow out of a cell. - Correct answer Hypertonic What molecule do cells use to store energy? - Correct answer ATP What is the relation between temperature and entropy? - Correct answer As temperature increases, so does entropy A reaction with a positive ΔG is called... - Correct answer Endergonic Why are endergonic and exergonic reactions coupled in a cell? - Correct answer Exergonic reactions are used to power endergonic reactions How does an enzyme speed up a reaction? - Correct answer By lowering the activation energy