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bio practice exam
biology exam 1
| Question | Answer |
|---|---|
| All the organisms on MMU campus make up A) an ecosystem B) a taxonomic domain C) a population D) a community | a community |
| Which of the following properties or processes do we associate with living things? A) evolutionary adaptation B) energy processing C) growth and reproduction D) responding to the environment E) all of the above | all of the above |
| In a hypothetical world, every 50 years people over 6 ft tall are eliminated from the population before they reproduce. Based on your knowledge of natural selection, you would predict that the average heigh of the human population will... | rapidly decline |
| What is a correct representation of the hierarchical organization of life from least to most complex? | hydrogen, water, nucleus, heart muscle cell, heart muscle tissue, heart, human |
| What are two main processes that ecosystems depend on? A) nutrient cycling and energy flow B) speciation and evolution C) decomposition and nutrient recycling D) photosynthesis and primary production | nutrient cycling and energy flow |
| The chemical properties of an atom are likely dependent upon: A) the number of neutrons in its nucleus B) the number of electrons in its valence shell C) the number of electrons in its nucleus D) the charge of the atom | the number of electrons in its valence shell |
| The atomic number of carbon is 6. 14^C is heavier than 12^C because the atomic nucleus of 14^C contains A) seven protons and seven neutrons B) six protons and six neutrons C) six protons and eight neutrons D) eight protons and six neutrons | six protons and eight neutrons |
| How many oxygen atoms are in the PRODUCT of the following reaction? C6H12O6 + 6 H20 + 6 O2 --> 6 CO2 + 12 H20 | 24 |
| In the equation: 2 H2 + O2 --> 2 H2O, A) only H2O is a compound B) H2, O2, and H2O are all elements, C) H2, O2, and H2O are all compounds D) only H2 and O2 are compounds | only h2O is a compound |
| A molecule with one electron in its valence shell is likely to participate in this type of chemical bond. A) ionic bond B) hydrogen bond C) polar covalent bond D) nonpolar covalent bond | ionic bond |
| The atoms of a hydrocarbon are typically held together by this type of chemical bond. A) Hydrogen bond B) hydrophobic reaction C) nonpolar covalent bond D) polar covalent bond | nonpolar covalent bond |
| Sweating cools your body by ___. A) evaporative cooling B) hydrogen bonding C) radiation D) cohesion | evaporative cooling |
| Water is polar because of A) its hydrogen bonds B) transfer of electrons C) its ability to freeze D) unequal sharing of electrons | unequal sharing of electrons |
| Which of the following solutions has the greatest concentration of hydroxide (basic) ions [OH-]? A) tomato juice at pH 4 B) lemon juice at pH 2 C) seawater at pH 8 D) urine at pH 6 | seawater at pH 8 |
| Carbonic acid (H2CO3) is a buffer used by the bloodstream to maintain pH of blood. Carbonic acid is a weak acid that dissociates into a bicarbonate ion (HCO3-), a weak base, & hydrogen ion (H+). thus, H2CO3 <--> HCO3- + H+ If pH of blood drops, expect... | the HCO3- to act as a base and remove excess H+ with the formation of H2CO3 |
| The following molecule is best described as a/an ____. (CH3-CH2-CH2-CH3) A) carbohydrate B) element C) protein D) hydrocarbon | hydrocarbon |
| What is a molecule that has the same molecular formula (same number and types of atoms) but different arrangements of bonds between those two atoms (basically same type of molecule just pictured differently) | structural isomers |
| Which property of the carbon atom gives it compatibility with a greater number of different elements than any other type of atom? | Carbon has a valence of 4 |
| Which of the following are polysaccharides (sugars)? A) glycogen and starch B) glucose and sucrose C) polypeptides and amino acids D) RNA and DNA | glycogen and starch |
| The 20 different amino acids found in polypeptides exhibit different chemical and physical properties and amino acid | side chains (R groups) |
| The monomeric subunits that make up polysaccharides are called? A) disaccharides B) monosaccharides C) nucleic acids D) amino acids | monosaccharides |
| How many water molecules would be produced with the formation of a 6 amino acid peptide? A) 3 B) 4 C) 5 D) 6 | 5 |
| The linear sequence of amino acids in a polypeptide chain is referred to as its ___ structure. A) secondary B) quaternary C) tertiary D) primary | primary |
| Proteins differ from one another because | the sequence of amino acids in the polypeptide chain differs from protein to protein |
Created by:
josie_d
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