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Science league
bio test for sciience league
| Question | Answer |
|---|---|
| which is not required to validate the results of an experient? a)large sample size b)multiple trials using the same procedure c)use of metric units when collecting data d) peer review of research in a scientific journal | C, use of metric units when collecting data |
| To be of value to science, hypothesis must be a) established facts b) testable c) proven correct D) popular E) new | b, testable |
| Theories help scientists to a) make a conculusion b) propose new ideas for how the world works c) determine fact from falsehoods d) prove hy[pothesis e) explain large bodies of data | e, explain large bodies of data |
| All scientific knowledge comes from, a) experimentation b) observatiion c) textbooks d) both A and B | d,both A and B |
| In celsius scale, the boiling point of water is a) 98.6 B) 100 c) 212 d) 0 E) 75 | B, 100 |
| which of the following does not meausure the same unit as the others? a) Pipette B) BUrette C) spring balance D) gradulated cylinder e) measuring cup | c, Spring balance |
| A cellular diameter of 40 micro meters is equivalent to a) .4 milimeter b) .04 millimeter c) 40,000 nanometers d) 4,000 nanometers e) Both B and C are correct | e, both B and C are correct |
| what is the total magnification of a microscope with 10x ocular and a 4x objective? a) 4x b) 10x c) 40x d) 100x e) 400x | c, 40x |
| which objective allow you to see the largest area of the object you are viewing? a) 4x B) 10x C) 40x D) 100x | a, 4x |
| fromt eh items below select thaose that are molecules. A) carbon B) water C) Chlorophyll D) A and B E) B and C | e, b and C |
| The chemical behaviorof an atom depends on the number of a) valence shells in the atom b) orbiitalsfond inanatom c) electrons in each orbital in the atom d) electrons in the outer valence shell in teh atom e) hybridized orbitals in the atom | d, electrons in the outer valence shell of an atom |
| A five- carbonsugar, phophate group and nitrogenous base are components of which of the following? a) carbohydrates B) proteins C) lipids D) nucleic acids | d, nucleic acid |
| what will happen to an animal cell placed in a salt water solution? a) the cell will shrink b) the cell will expand C) the cell will burst D0 the cell will shrink and then expand and then shrink again | a, the cell will shrink |
| whihc of the following would most likely move through the plasma membrane of a cell most rapidly? a) K+ B) CO2 C) an amino acid D) starch E) fructose | b, CO2 |
| Chamber A contains 40 perccent helium and Chamber B contains 20 percent helium. what should have happened? a) the net movement of helium will be from A to B B) the net movement of helium will ne from B to A C) the heluim will remain concentrated in A | A, the net movement of helium will be A to B |
| which of the following terms best describe thebasic process of breaking down large molecules into smaller ones. A) catalysis B) metabolism C) anabolism D) deydration E) catabolism | e, catabolism |
| which of the following elements is used to destinguish organic compounds from inorganic compoundds? A) hydrogen B)Oxygen C) nitrogen D)carbon E) phosphourus | D, carbon |
| which type of bond is found in most organic molecules such as sugar? A) hydrogen B) IOnic C) covalent D) surcronic | c, covalent |
| hydrochloric acid is an acid b/c it gives off A) OH B) H2O C) H+ D) ions | C, H+ |
| If a soultionn has a pH of 3.5 and a chemical is added to buffer the solution, what will happen to the pH of the solution? A) It will move toward pH 1.0 B) It remain near 3.5 C) It move towards pH of 7 D) it will move toward 14 | b, it will remain near 3.5 |
| capillary action depends on water's A) high heat evaporation B) cohesiveness C)ability to act as a solvent D) ability to absorb lots of energy | b, cohesiveness |
| sweating aids in the removal of heat primarily due to A) the high surface tension of the water B) water's high heat of vaporization C) the high specific heat of water D) the buffering capacoty of water E) the dissocation of water molecules | b, water's high heat of vaporization |
| The mechanism of enzyme action is A) providing energy to speed up the rate of a reaction B) changing the direction of thermodynamic equilibrium C) changing endergoinic into exergonic reactions D) lowering the energy of activation for a reaction | d, lowering the energy of activation for a reaction |
| which of the following environments or actions does not affect the rate of an enzyme reaction? A) heating the enzyme B) cooling the enzyme C) substrate concentration D) pH E) all of the above | e, all of the above |
| The process of stabilizing the sturcture of an enzyme at a site other than the active site is an example of a) feedback inhibition B) competitive inhibition C) allosteric regulation D) noncompetitive inhibition E) cooperativity | c, allosteric regulation |
| Metabolism is best described as A) synthesiss of macromolecules B) breakdown of macromolecules C) control of enzymatic activity D) A and B E) A,B and C | e; A, B,and C |
| more ATP acan be formed from the energy in food molecles by aerobic organisms; those whichutillize A) carbon B) hydrogen C)oxygen D) nitrogen E) all of the above | c, oxygen |
| In which type of cell can we expect to find the greatest concentration of mitochondria? A) muscle cell B) fat cell C) cell from the leaf of a plant D) bone cell | a; muscle cell |
| chemical energy is a form of A) potential energy B) kinetic energy C) heat D) motioon E) entropic | a, potential energy |
| in your body, what process converts the chemical energy found in glucose into the chemical energy found in ATp? A) digestion B) cellular C) anabolism D) redox E) potentiation | b, cellular respiration |
| what tpe of reaction breaks the bonds that join the phosphate groups in an ATP molecule? A) anabolism B) dehydration decompostion C) hydrolysis D) dehydation synthesis E) entropic | c, hydrolysis |
| what type of bond joins the phosphates of the ATP? A) hydrophobic B) hydrogen C) covalent D) hydrophilc E) ionic | c, covalent |
| who is known as "the father of microscopy," and coined the term "cell". A) Anton van leeuwenhoek B) Robert Kooke C) john Wilkins D) Robert Boyle E) Isaac Newton | B, Robert Hooke |
| one of the pricipals problems in using the electron microscope to study cell is that A) some cells are too small to be seen B) the electron microscope has limited resolution C) can't slice cells thinly enough D) cells alive E) cells dead | e, cells can't be alive |
| who suggested the structure of DNA? A) MAurice Wilkins B) Watson and Crick C) Gorter and Grendel D) A and B E) none of the above | d, A and B |
| who is credited with the first proposing that DNA was helical from x-ray diffractions? A) Anton wan leeuwenhoek B) robert Hooke C) rosalind Franklin D) Watson and Crick E) Gorter and Grendel | c, Rosalind Franklin |
| Who used catatrophism to explain the fossil record? A) charles lyell B) charles darwin C) georges cuvier D) Alfred Wallace | c, georges cuvier |
| the notion that tanned skin, caused by UV irradiation, can be passed on to offspring is consistent with who ideas? A) charles lyell B)Charles Darwin C) georges Cuvier D) jean Baptiste LAmarck E) Alfred Wallace | e, Alfred Wallace |
| Natural selection A) cuses mutations B) directly acts to change genotype C) acts on phenotype D) causes sexual reproduction E) All of the above | c, acts on phenotype |
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