BIO 121 Lab Final Exam ! questions and correct detailed answers graded a+.

which of the following is NOT one of the fundamental characteristics of science? - correct answers it involves a search for irregularities a useful hypothesis is - correct answers a testable statement the scientific method includes all of the following EXCEPT - correct answers theories in an experiment, which of the following variables is used as baseline for comparison? - correct answers control a theory is... - correct answers an idea on which experts in the field agree in a typical solution, the ________ is the dissolving medium and the ________ is the substance dissolved. - correct answers solvent, solute the function of a hypothesis is to ________ - correct answers provide direction for gathering data after completing a controlled experiment, a scientist changes the dosage of an antibiotic and repeats the experiment. The change in dosage is the _________ - correct answers independent variable scientific notation is a way of expressing __________ - correct answers extremely small and large numbers and even those that have many zeros for the number 6.8 x 10^7, the 7 is called the - correct answers exponent k h d (g,l,m) d c m - correct answers 1,000 100 10 1 .1 .01 .001 the metric prefix "kilo" means - correct answers thousand what is the symbol for centimeter? - correct answers cm how many millimeters are in 1 centimeter - correct answers 10 when multiplying numbers written in scientific notation, you should _______ the exponents. - correct answers add what is the number 4.85 x 10^5 in standard notation - correct answers 485,000 which of the following instruments is used in the laboratory to distribute and extract precise amounts of liquids - correct answers pipette what is the total magnification of the ocular lenses? - correct answers scanning - 4x (10x)= 40x low-power - 10x (10x)= 100x high-power - 40x (10x)= 400x what is the approximate magnification of the low-power objective? - correct answers 10x The microscope platform upon which specimen slides are placed is called the ________. - correct answers stage the distance between the objective lens and the specimen is called the _________ distance - correct answers working to change the amount of light entering the objective lens, you would adjust the ________ - correct answers iris diaphragm while looking at a specimen under a microscope, you move the slide to the right. In which direction does the image move? - correct answers to the left when using the _______ objective, you would use the coarse-adjustment knob to bring the specimen into focus - correct answers low-power which objective would you use to search for a specimen? - correct answers scanning you are looking at a specimen through a high-power objective with a magnification of 45x, and the ocular has a magnification of 10x. What is the total magnification? - correct answers 450x you are looking at a specimen under low power, and you switch to the high-power objective. Which of the following happens? - correct answers the amount of light decreases chemistry is the study of the _________ of matter - correct answers properties, interaction, and composition and structure you dissolve a teaspoon of sugar in water. the sugar is called the ________ - correct answers solute what is the range of the pH scale? - correct answers 0-14 which type of chemical bond results from the equal sharing of electrons? - correct answers nonpolar covalent bonds a solution with a pH of _______ is considered neutral - correct answers 7 which of the following has the lowest pH - correct answers stomach acid bases have which of the following characteristics? - correct answers release OH- in solution or decrease the H+ concentration which of the following is NOT a characteristic of acids? - correct answers feel slippery you have a "sour stomach", so you take an over-the-counter antacid that relieves your symptoms by __________ - correct answers absorbing excess H+ which of the following organic molecules are commonly found in living things? - correct answers carbs, lipids, and protein (fatty acids as well) the characteristics of glucose include which of the following? - correct answers important source of cellular fuel fats are stored in the body as - correct answers triglycerides _______ are the building blocks of protein - correct answers amino acids benedict's tests for... and reaction will be... - correct answers simple sugars a precipitate of yellow, green, orange, or red iodine reagent tests for... and reaction will be... - correct answers starches a dark blue color biuret's reagent tests for... and reaction will be... - correct answers protein light violet or lavender color paper test tests for... and reaction will be... - correct answers lipids translucence the biuret test is commonly used to detect the presence of which of the following? - correct answers proteins some people get bad stomach cramps if they consume milk and other dairy products. These individuals have an intolerance to - correct answers lactose how does benedict's solution react when a very high amount of reducing sugar is present in a sample - correct answers brick-red precipitate is formed what does the cell theory state? - correct answers the cell is the basic unit of structure and function of all living things unlike eukaryotic cells, prokaryotic cells lack a - correct answers (membrane-bound) nucleus bacilli are bacteria shaped like - correct answers rods which of the following types of bacteria could you use to make yogurt? - correct answers lactobacillus acidophilus the size of a growing, metabolically active cell ultimately will be limited by its ________ - correct answers surface area __________ consist of tissues organized to preform specific functions - correct answers organs plants are classified as autotrophs because they can perform which of the following biological processes? - correct answers photosynthesis a human being and an onion BOTH have which of following types of cells? - correct answers epidermal cells without a nucleus, a cell could not do which of the following? - correct answers grow, reproduce, or survive the sum total of chemical processes that occur in organism is called __________ - correct answers metabolism an enzyme functions as a biological ________ - correct answers catalyst the reactant the enzyme acts upon is called the - correct answers substrate _________ are nonprotein organic molecules that improve enzymatic action - correct answers coenzymes An enzyme reacts with a substrate to form an enzyme-substrate _____. - correct answers complex enzymes _______ chemical reactions - correct answers speed up bromelain is an enzyme found in pineapples that breaks down _______ - correct answers proteins which of the following conditions might affect the functioning of the enzyme catalase? - correct answers liver disease photosynthesis is the process by which plants capture energy from s