Basic concepts: molecular biology, DNA, RNAs, chemical bonds, importance of water, chemical reactions, organic compounds, carbohydrates, lipids, cholesterol, proteins, amino acids, fats, steroids, emulsifiers, etc.
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Biology 205 (BIOL 205-UCAL) Midterm III
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Question 1 |
A | Two subatomic particles. |
B | Three subatomic particles. |
C | Hundreds of subatomic particles. |
D | Five subatomic particles. |
Question 2 |
A | Because CO2 reacts with water to produce carbonic acid. |
B | Because CO2 acts as a low pH buffer. |
C | Because CO2 reacts with calcium to produce bicarbonate. |
D | Because CO2 is an acid. |
Question 3 |
A | Maltose |
B | Cellulose |
C | Glucose |
D | Fructose |
Question 4 |
A | DNA and RNA replication. |
B | Protection from the outside environment. |
C | Locomotion. |
D | Enzyme and proteins synthesis. |
E | Provide structural support. |
Question 5 |
A | Locomotion. |
B | Isolation from the outside; like a cell wall. |
C | Facilitate active transport and diffusion. |
D | Attaching to host surfaces. |
Question 6 |
A | ...high cholesterol. |
B | ...diabetes. |
C | ...thyroid problems. |
D | ...obesity. |
Question 7 |
A | They do not form polymers. |
B | They are nonploar and therefore hydrophilic. |
C | They are the largest biological molecules. |
D | They can form many different shapes with random orientations. |
Question 8 |
A | They speed up chemical reactions without participating in the reaction. |
B | They slow down chemical reaction by participating in the reaction. |
C | They speed up chemical reactions by participating in the reaction. |
D | They slow down chemical reaction by acting as a buffer. |
Question 9 |
A | Genetic control of the cell. |
B | Provide structural support for the nucleus. |
C | Manufacture and distribution of molecules. |
D | Energy processing. |
E | Provide structural support for the cell wall. |
Question 10 |
A | Cellulose |
B | Carboxylic acids |
C | Glycogen |
D | Starch |
Question 11 |
A | ...lower the pull of electrons towards its nucleus. |
B | ...higher the radioactivity of the atom. |
C | ...more stable the atom. |
D | ...higher the pull of electrons towards its nucleus. |
E | ...lower the radioactivity of the atom. |
Question 12 |
A | Transport proteins form channels which allow ions and polar molecules to move across. |
B | The difference in pH levels inside and outside the cell facilitates movement of ionic and polar molecules. |
C | Receptor proteins codes the ionic and polar molecules so that it will be accepted by the phospholipids. |
D | Simple diffusion process. |
Question 13 |
A | Electrons |
B | Protons |
C | Neutrons |
D | Protons and Electrons |
E | Protons and Neutrons |
Question 14 |
A | Most common two; glucose forms 5 membered structures while fructose forms 6 membered structure. |
B | They often form ring structures. |
C | They usually characterized by three double bonded C-O structures. |
D | Their molecular formulas are usually multiples of CH2O2. |
Question 15 |
A | ...Centriole, Golgi apparatus and Ribosomes. |
B | ...Plasma membrane, Ribosomes and Lysosome. |
C | ...Microtubule, Intermediate filament and Microfilament. |
D | ...Lysosome and Centriole. |
E | ...Ribosomes, Lysosome and Centriole. |
Question 16 |
A | Fructose is a polymer while glucose is a monomer. |
B | Fructose is cheaper than glucose. |
C | There is more fructose naturally in corn syrup. |
D | Fructose is sweeter than glucose. |
Question 17 |
A | Radon gas |
B | Sulfur mustard gas |
C | Thorium gas |
D | Natural gas |
Question 18 |
Suggestion: Take your time to answer this question. It can be confusing with 6 types!
A | IV , I , VI , V , II and III |
B | IV , VI , II , III , V and I |
C | I , III , IV , V , II and VI |
D | VI , IV , III , II , V and I |
E | VI , IV , II , V , III and I |
F | IV , VI , III , II , V and I |
Question 19 |
A | The base A pairs with base C while base G pairs with base T to form a double helix RNA. |
B | The base A pairs with base T while base G pairs with base T to form a double helix RNA. |
C | The base A pairs with base C while base G pairs with base T to form a double helix DNA. |
D | The base A pairs with base G while base C pairs with base T to form a double helix RNA. |
E | The base A pairs with base G while base C pairs with base T to form a double helix DNA. |
F | The base A pairs with base T while base C pairs with base G to form a double helix DNA. |
Question 20 |
A | Increase in smooth endoplasmic reticulum. |
B | Increase in rough endoplasmic reticulum. |
C | Increase production in glycoprotein. |
D | Decrease production in glycoprotein. |
Question 21 |
Note: Moose dung is a traditional Canadian delicacy. Yum yum 🙂
A | Freeze the dung before cooking. |
B | Add salts, ionic compounds, to the moose dung. |
C | Increase the humidity of the cook pot. |
D | Decrease the humidity of the cook pot. |
Question 22 |
6 C? (ID-B03-04)
A | 6 |
B | 8 |
C | 7 |
D | 14 |
Question 23 |
A | polysaccharide |
B | monsaccharide |
C | disaccharide |
D | lipid |
E | protein |
Question 24 |
A | Carbon and Hydrogen |
B | Carbon, Oxygen and Nitrogen |
C | Nitrogen and Oxygen |
D | Hydrogen, Carbon and Oxygen |
E | Hydrogen, Oxygen and Nitrogen |
F | Hydrogen and Oxygen |
Question 25 |
Image mod from: http://en.wikipedia.org/wiki/Ethyl_group
A | IV only |
B | I only |
C | II and IV |
D | III only |
E | II only |
F | I, II and IV |
Question 26 |
A | Lipids |
B | Glycogen |
C | Cellulose |
D | Starch |
E | Chitin |
Question 27 |
A | 100 to 1000 micrometres |
B | 0.1 to 1.0 micrometres |
C | 1.0 to 10 micrometres |
D | 10 to 100 micrometres |
Question 28 |
A | Heating |
B | Hydrolysis |
C | ATP injection |
D | Protein pumps |
Question 29 |
A | More cholesterol within the lipoprotein, hence away from the blood. |
B | A very high LDL to HDL ratio. |
C | More triglycerides within the lipoprotein, hence away from the blood. |
D | A very low LDL to HDL ratio. |
Question 30 |
A | Genetic theory |
B | Cell theory |
C | Endosymbiont theory |
D | Theory of inheritance |
Question 31 |
A | ...their chemical structures. |
B | ...water solubility level. |
C | ...their orientation of the hydrogen atoms. |
D | ...the type of translation. |
Question 32 |
A | False |
B | True |
Question 33 |
A | 100 |
B | 20 |
C | Millions |
D | 35 |
E | 50 |
Question 34 |
A | 1/30th of a typical prokaryotic celll. |
B | 1/10th of a typical prokaryotic celll. |
C | 1/25th of a typical prokaryotic celll. |
D | 1/50th of a typical prokaryotic celll. |
E | 1/100th of a typical prokaryotic celll. |
Question 35 |
A | Theory of evolution |
B | Molecular theory |
C | Laws of inheritance |
D | Genetic theory |
E | Cell theory |
Question 36 |
A | False |
B | True |
Question 37 |
A | Amino group |
B | Carbonyl group |
C | Phosphate group |
D | Methyl group |
E | Hydroxyl group |
F | Carboxyl group |
Question 38 |
A | Process in which chemical difference between inside and outside the cell is maintained. |
B | Production of proteins by the bone marrow to keep stable white blood cell count. |
C | A digestive process used by herbivorous to break down the plant cells. |
D | Movement of an organism in response to a chemical stimulus. |
Question 39 |
A | Scanning Electron Microscope (SEM) |
B | Light Microscope (LM) |
C | Transmission Electron Microscope (TEM) |
D | Electron Microscope (EM) |
Question 40 |
A | I. replication II. transcription |
B | I. transcription II. replication |
C | I. translation II. transcription |
D | I. transcription II. translation |
E | I. translation II. replication |
F | I. replication II. translation |
Question 41 |
A | 5 electrons. |
B | 10 electrons. |
C | 5 electrons. |
D | 13 electrons. |
E | 8 electrons. |
Question 42 |
A | 10 times more H+ |
B | 10 times less H+ |
C | 100 times less H+ |
D | 2 times more H+ |
E | 100 times more H+ |
[H+] = 10-pH
Question 43 |
A | Molecules are always ionic while compounds could be either ionic or covalent. |
B | Compounds composed of two or more different elements while molecules composed of two or more atoms. |
C | Molecules easily react with organic matter therefore they often involved in chemical reactions. Compounds are stable entities and are often inert. |
D | All organic matter is compounds while molecules are inorganic. |
E | Molecules composed of two or more different elements while compounds composed of two or more atoms. |
Question 44 |
A | I. chromosomes II. chromatin |
B | I. ribosomes II. lysosomes |
C | I. lysosomes II. nucleoli |
D | I. chromosomes II. ribosomes |
E | I. ribosomes II. nucleoli |
Question 45 |
A | Ethane |
B | Butane |
C | Benzene |
D | Methane |
Question 46 |
A | There is a world wide shortage of advanced microscopes. |
B | Light microscopes are cheaper for a biologist to obtain. |
C | The techniques used to study microscopic particles in cell biology has not changed since 1665. |
D | Movement of organic material is magnified in advanced microscopes hence harder to study. |
Question 47 |
A | RNA has Thymine (Thy) nitrogenous base instead of Cytosine (Cyt). |
B | RNA has Cytosine (Cyt) nitrogenous base instead of Adenine (Ade). |
C | RNA has Guanine (Gua) nitrogenous base instead of Cytosine (Cyt). |
D | RNA has Uracil (Ura) nitrogenous base instead of Thymine (Thy). |
E | RNA has Adenine (Ade) nitrogenous base instead of Cytosine (Cyt). |
F | RNA has Thymine (Thy) nitrogenous base instead of Adenine (Ade). |
Question 48 |
A | ...good for human health/digestive system. |
B | ...contain more nutrition than plant based fats. |
C | ...solid at room temperature. |
D | ...unsaturated fats. |
Question 49 |
A | To allow nutrients and gasses to pass across the cell surface. |
B | To be able to stack together to form tissues. |
C | To be able to process food and data. |
D | To be able to communicate to the outside world. |
Question 50 |
A | Helium-4 |
B | Nitrogen-12 |
C | Carbon-13 |
D | Carbon-14 |
E | Carbon-12 |
Question 51 |
A | Vesicles |
B | Centriole |
C | Golgi apparatus |
D | Nucleolus |
E | Rough endoplasmic reticulum |
Question 52 |
A | ...by heating the reactants. |
B | ...always outside cell walls. |
C | ...in aqueous environment of cells. |
D | ...only by breaking covalent bonds because living cells cannot break down ionic bonds. |
Question 53 |
A | Serum |
B | White blood cells |
C | Platelets |
D | Red blood cells |
Question 54 |
A | The elemental abundance must be less than 0.2% of the human body weight. |
B | The elemental abundance must be less than 0.4% of the human body weight. |
C | The elemental abundance must be less than 1.0% of the human body weight. |
D | The elemental abundance must be less than 0.01% of the human body weight. |
E | The elemental abundance must be less than 0.1% of the human body weight. |
Question 55 |
A | The α helix and the β pleated sheet structures are tertiary structure. |
B | Protein structures have four levels of structures. |
C | Hydrogen bonds are primary structures of proteins. |
D | Some proteins only have α helix structures while others can have only β pleated sheet structures. |
Question 56 |
A | Fiber junctions |
B | Gap junctions |
C | Anchoring junctions |
D | Tight junctions |
Question 57 |
I. Covalent bonds are stronger than ionic bonds.
II. Chemical reactions always result in loss of electron(s).
III. Water is slightly polar.
IV. Ionic bonds are bound together with oppositely charged ions.
A | All of the above statements are correct. |
B | I and III |
C | I , III and IV |
D | I , II and III |
E | I and II |
F | II and IV |
Question 58 |
A | 15, iron |
B | 25 , nitrogen |
C | 15 , sodium |
D | 22 , sodium |
E | 15 , nitrogen |
F | 22 , iron |
Question 59 |
A | A substance that prevent genetic mutations. |
B | A substance that resists genetic mutations. |
C | A substance that increase the pH level of a high pH solution while decrease the pH level of a low pH solution. |
D | A substance that prevent changes in pH by accepting or donating hydrogen irons. |
E | A substance that resists changes in pH by accepting or donating hydrogen irons. |
Question 60 |
A | They have kinks caused by double bonding of carbon atoms. |
B | Compared to unsaturated fatty acids, they have a very high melting point. |
C | They are often found in olive oil and vegetable oils. |
D | They have the maximum number of hydrogens (alkanes) in the fats and lipid group. |
Question 61 |
A | Carry information of amino acid sequence from the genes to make proteins in cells. |
B | Provide energy for the DNA structure by converting energy from cells into ATP and transferring it to the nucleus. |
C | Protect the nucleus from genetic mutations, even though this always does not work. |
D | Develop new genetic codes for evolutionary adaptations. |
Question 62 |
A | The temperature of the mixture should have increased as the mixing progresses. |
B | The milk acted as the solute which breaks down the chemical compounds in the cocoa powder. |
C | The mixing of the two most likely have broken down the molecular bounds of water and that resulted in reaction with cocoa powder. |
D | Milk is the solvent while cocoa powder is the solute. |
Question 63 |
A | They are composed of globular proteins that are assembled and disassembled in different regions of the cell to form hollow pathways. |
B | They are composed of action and involved in cell movement and maintaining cell structure. |
C | They made the various fiberous proteins of α-helical
coiled-coils that transport materials from one area to another. |
D | They are only found in plant cells because animal cells with movement cannot maintain the structure. |
Question 64 |
A | Energy storage and release. |
B | Signaling molecules for sex hormones. |
C | Synthesis of Amino acids, DNA and RNA. |
D | Forms cell membranes. |
Question 65 |
A | Amino group |
B | Carbonyl group |
C | Phosphate group |
D | Carboxyl group |
E | Hydroxyl group |
Question 66 |
A | β−1-->4 |
B | α−1-->4 |
C | β−1-->1 |
D | α−1-->1 |
Question 67 |
A | Quaternary structure |
B | Secondary structure |
C | Tertiary structure |
D | Primary structure: |
Question 68 |
A | Thyroid gland |
B | Prostate gland |
C | Pineal gland |
D | Pituitary gland |
E | Salivary gland |
Question 69 |
Image mod from: http://commons.wikimedia.org/wiki/File:0301_Phospholipid_Structure.jpg
A | III and I |
B | I and IV |
C | III and IV |
D | I and III |
E | IV and I |
Question 70 |
A | Very high electron transfer rate and high electrical conduction rate. |
B | The chemical properties such as high cohesion and polarity. |
C | The physical properties such as very low angles between the two H-atoms and the O-atom. |
D | Very high reaction rate. |
Question 71 |
A | I. covalent bonds II. nucleic bonds |
B | I. ionic bonds II. nucleic bonds |
C | I. covalent bonds II. peptide bonds |
D | I. ionic bonds II. peptide bonds |
Question 72 |
A | 5 |
B | 3 |
C | 6 |
D | 4 |
E | 2 |
Question 73 |
A | Chitin |
B | Flagella |
C | Glucose |
D | Peptidoglycan |
Question 74 |
A | 5-carbin sugar, phosphate group and a adenine Hint: While it is true a adenine can be one, it is not a general part! |
B | 3-carbin sugar, phosphate group and a adenine |
C | 3-carbin sugar, phosphate group and a nitrogenous base |
D | 5-carbin sugar, phosphate group and a nitrogenous base |
Question 75 |
A | Majority of organic cells lacks nucleus. |
B | Biological cells have the ability to differentiate Carbon-12 from Carbon-14. |
C | Natural carbon is only produced by plant cells. |
D | Only the animal cells that have materials that move around (mobile). |
E | Both animal and plant cells contains materials that move around (mobile). |
Question 76 |
A | They process materials and produce usable energy for eukaryotic cells. |
B | They are the transport vesicles that deliver glycoprotein from ER membrane to Golgi apparatus. |
C | In humans, they acts as the digestive compartments within cells. |
D | In plants, they store toxins to protect them from predators. |
Question 77 |
A | Only the tRNA structure is linear. |
B | The tRNA carries amino acids with high energy bound for making proteins. |
C | Only the mRNA structure is linear. |
D | Coding of the proteins is done by mRNAs. |
Question 78 |
A | 75% |
B | 65% |
C | 99% |
D | 100% |
E | 50% |
Question 79 |
A | Anchoring junctions |
B | Gap junctions |
C | Tight junctions |
D | Membrane junctions |
E | Messenger junctions |
Question 80 |
A | Proteins |
B | Nucleic Acids |
C | Carbohydrates |
D | Lipids |
Question 81 |
A | Hydrogen bonding |
B | Acid-base reactions |
C | Chemical precipitation reactions |
D | Vital hormone producing reactions |
Question 82 |
A | Heat is the amount of energy associated with movement of atoms while temperature is the intensity of heat (average speed of atoms). |
B | Temperature is a long term quantitative measurement of energy while heat is a short term measurement of energy. |
C | Temperature is the amount of energy associated with movement of atoms while heat is the intensity of heat (average speed of atoms). |
D | Heat is produced through instantaneous reactions such as boiling water. Temperature is the quantitative measurement of heat. |
Question 83 |
A | Glycophorin protein |
B | Band 3 protein |
C | Ankrin protein |
D | Aquaporins protein |
E | Spectrin protein |
Question 84 |
A | 4 |
B | 3 |
C | 5 |
D | 2 |
Question 85 |
A | Secondary structure |
B | Primary structure |
C | Tertiary structure |
D | Quaternary structure |
Question 86 |
A | DNA as genetic materials |
B | Nucleus |
C | Cell walls |
D | Organelles |
Question 87 |
A | Low radioactivity and polarity. |
B | The high atomic mass. |
C | The very high electronegative nature of the molecule. |
D | The hydrogen bonds. |
Question 88 |
A | Neutrons and protons from different atoms react with each other. |
B | Produce molecules and compounds with polarity. Hint: Not always, but sometimes. |
C | Number of electrons within the structure increases. Hint: Not always, but sometimes. |
D | Valance shell electrons react with other atoms to form bonds. |
Question 89 |
A | 6 |
B | 5 |
C | 4 |
D | 3 |
E | 2 |
Question 90 |
A | Ribosomes, organelles and hemoglobin. |
B | Nucleus, plasma membrane and hemoglobin. |
C | Ribosomes, plasma membrane and hemoglobin. |
D | Plasma membrane and hemoglobin. |
E | Nucleus, ribosomes and hemoglobin. |
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Credits: Based on the excellent class notes provided by, Dr. Lohmeier-Vogel during Fall 2014.
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