Test 1 with answers

Test 1 with answers - Biol 101 Test 1 — DeSaix Name Print...

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Unformatted text preview: Biol. 101 Test 1 — DeSaix September 14, 2010 Name Print your name, last name first, and your PID number legibly on your answer sheet. Bubble in both below. Each answer is worth 2 points. Always choose one best answer and use only number 2 pencils to fill in your answers. Be sure to sign the pledge on your answer sheet. The last question will be used only if another question has to be deleted. Turn in your answer sheet in alphabetical order at the front of the room. Keep your test paper with answers to check against the key so that you will know what you have missed. The key will be posted on Blackboard after the test. Your score will be on Connect Carolina. E 1. The control in an experiment: a. makes the experiment valid. b. is an additional replicate for statistical purposes. c. reduces the experimental errors. d. minimizes experimental inaccuracy. e. allows a standard of comparison for the experimental group. B 2. “Vacancies” in the electron orbitals of atoms is important in biology because: Atoms with vacancies are stable and therefore important for life’s molecules. An atom with a vacancy is more likely to react with other atoms. An atom with no vacancies is likely to disrupt other atoms through electron interactions. A vacancy in an atom’s orbital means that the atom is radioactive and useful for labeling biological processes. e. Most of the atoms which make up life’s molecules have no vacancies. 999‘?” E’ 3. A molecule with the formula C55H110055 is probably a(n): a. oil. b. steroid. c. wax d. protein. e. polysaccharide. E 4. Which of the following is true about an enzyme? a. An enzyme is stable at high temperatures. b. An enzyme is a vitamin. c. An enzyme increases the activation energy of a substrate and hence accelerates reactions. d. An enzyme catalyzes a reaction that is theoretically impossible otherwise. e. An enzyme combines chemically with a substrate to form a temporary enzyme-substrate complex. D 5. Which of the following best describes enzymes in general? a. They digest food b. They manufacture food c. They were probably the first living things on earth d. They stimulate chemical reactions without being changed 3 6. Nucleotides are the building blocks of Carbohydrates DNA Proteins Lipids Fat 99-927.” A 7. Which of these is a mismatch: Subunit Functional molecule a. Nucleotides proteins b. Monosaccharides sugars 0. Amino acids enzymes d. Fatty acids lipids e. Polypeptides proteins C 8. In an early Weight-loss diet, the amount of all the important vitamins and other nutrients were carefully calculated to be sufficient while holding foods high in calories, and especially fat, to a minimum. Which of the following might be a negative effect of such a diet? a. Bodies do not store calories, so if sufficient calories are not provided each day, the body cannot replace and repair damaged or worn our parts. b. It is impossible to get foods with adequate Vitamins and other nutrients on a low-calorie/low-fat diet. 0. Without adequate lipids in the diet, the body cannot use the vitamins it takes in. (:1. Without adequate lipids in the diet, the body has to break down its own lipids resulting in toxic by—products. e. Nerves cannot work properly in adults if there is not enough fat in the diet. C 9. Blackboard Question: On the Blackboard site, under the “Sample Tests” button there is a file that is not a sample test. What is this file? a. Directions for locating Supplemental Instruction sites b. Explanation for having only 45 questions on the test rather than 50, now that homework counts 10% of your grade making each test is only 90 points rather than 100 c. Diagnosis check sheet to diagnose study patterns and note taking to provide data about performance that MUST be brought to any meeting with Dr. DeSaix (1. Instructions for interpreting the placement test e. Information about which days Dr. DeSaix is in Steele and which days she is in Coker. D 10. Which of the following best defines the term “prokaryotic cell”? a. Cells without photosynthetic pigments or chlorophyll b. Cells that are primitive because they do not have distinct parts 0. Cells that lack nuclear material (1. Cells that lack a distinct nucleus e. Cells about to enter mitosis. C 1 1. Which of the following kingdoms contain prokaryotes? a. Archea and Protista b. Fungi and Archea c. Archea and Bacteria d. Archaea and Eukarya e. Plants and Animals E 12. Evidence indicating that mitochondria evolved from ancient symbiotic bacteria includes the relative size of the mitochondria compared with bacteria, the present of a double membrane, and: A molecule of DNA present, in both The fact that mitochondria cannot reproduce The fact that mitochondria reproduce by division of existing mitochondria The similarity of mitochondria to chloroplasts Only a and c are correct 9999‘s» C 13. In order for active transport across a cell membrane to occur, there must be: a. Diffusion b. Osmosis c. Energy used for the transfer d. A higher concentration of the transported substance outside the cell and a lower concentration inside. B 14. Freshwater fish are hypertonic relative to the surrounding water. As a result, these fish will tend to: a. Lose water to the surrounding environment by osmosis b. Absorb water from the surrounding environment by osmosis c. Gain solutes from the water by diffusion d. Neither lose nor gain water or solutes. E 15. If placed in tap water, an animal cell will undergo lysis, whereas a plant cell will not. What accounts for this difference? a. expulsion of water by the plant cell’s central vacuole b. the relative impermeability of the plant cell membrane to water c. the relative impermeability of the plant cell wall to water (1. the fact that plant cells are isotonic to tap water e. the relative inelasticity and strength of the plant cell wall. E 16. Which of the following utilize DNA as their genetic material? a. Prokaryotes b. Eukaryotes c. Archaea d. A and c only e. A, b and c D 17. By what mechanism do sodium ions (Na+) and potassium ions (K+) move across the cell membrane against their respective concentration gradients? a. Bulk flow b. Diffusion c. Osmosis (1. Active transport e. Osmosis and diffusion. D 18. Which of the following macromolecules is primarily responsible for the insolubility of cell membranes in water? a; Starch b. Glycogen c. Protein (1. Lipid c 19. One of the generalizations of the cell theory is that: a. All cells have ribosomes b. All cells divide by copying material in the nucleus c. All living organisms are made up of cells (1. Cells arise through spontaneous generation 6. Growth is solely the result of cell division D 20. A mutant bacteria without ribosomes would be incapable of: Carbohydrate synthesis Respiration DNA programming Protein synthesis e. Diffusion D 21. Organelles composed of a system of canals, tubes and sacs that transport molecules 99¢? throughout the cytoplasm are: Golgi bodies Ribosomes Mitochondria Endoplasmic reticula Lysosomes The nucleolus: 9’ Is enclosed by a membrane Is visible only during cell division Contains protein and nucleic acids Is found only in sperm and egg cells Occurs only in plant cells. C) [\J OPPVPNOPPV D 23. Four of the five answers listed below are characteristics of the plasma membrane. Select the exception. Phospholipid Fluid mosaic Lipid bilayer Inert and impermeable Hydrophobic tails Secretory proteins: Are produced by ribosomes on the smooth endoplasmic reticulum Are transported out of the cell in tiny sacs called transport vesicles Are produced by the cell for internal use Are released from the cell through the plasma membrane Both b and d B 25. People who have PKU have a defective enzyme for breaking down the amino acid {7.3 N OQPVPPOQPVP phenylalanine. When phenylalanine is not broken down properly, toxic materials are produced. therefore: a. The diet should be one that has no phenylalanine b. Use of proteins for fueling energy pathways must be minimized c. Proteins which are eaten must not be used to build new body protein d. The diet must be very rich in phenylalanine e. Meat is preferred over plant materials in the diet D 26. The best restatement of the hypothesis that many different variables affect the growth and development of tobacco plants is: a. Different variables cause tobacco plants to grow more than one inch per week. b. Amount of rain can affect the growth and development of tobacco plants. 0. If tobacco plants are watered then they will grow and develop d. If tobacco plants are given a liter of water per week, they will grow at least an inch each week. e. If tobacco plants are given more than one liter of water each week, then they will grow more each week than plants which are not given water. E 27. Which of the following is an important difference between light-dependent and light— independent reactions of photosynthesis? a. The light-dependent reactions occur only during the day; the light independent reactions g occur only during the night. b. The light—dependent reactions occur in the cytoplasm; the light—independent reactions occur in the chloroplasts. c. The light—dependent reactions utilize C02 and H20; the light—independent reactions produce C02 and H20. (1. The light—independent reactions include both photosystems I and II; the light dependent reactions use energy stored in ATP and NADPH. e. The light-dependent re ' - roduce ATP and NADPH; the light-independent reactions use energy stored in ATP a any ( m NQD'P (J C 28. Which of the following ce 1 structures is continuous w1th the nuclear envelope? The nucleolus Chromatin Endoplasmic reticulum Vacuoles Lysosomes The fluid mosaic model refers to: The arrangement of swimming pool tiles The arrangement of organelles inside cells The arrangement of components in plasma membranes The arrangement of cells in multicellular tissues The arrangement of monomers in a protein polymer Which of the following functions are not performed by chloroplast? Cyclic photophosphyrolation Turning sunlight into sugars Breaking the bonds of water molecules Forming bonds in sugar molecules Release of oxygen Which of the following organelles contain their own DNA? lysosomes golgi bodies ribosomes mitochondria none of the above O N 909959999997? Ud DJ 99.0.65» U b.) _. 9999‘9' the: O b.) b.) 099??»- was??? P—PP‘P' 13> L») .0 W999?!» 3> .\‘ “$09.09*? w 9° 9999‘? 99.0.0”? The little granules rich in ribonucleoprotein which are found in the cytoplasm are called Cristae Golgi bodies Plastids Ribosomes Lysosomes Which is the best general description of photosynthesis? It uses light, oxygen and carbon dioxide to make sugars. It uses ATP, oxygen, and carbon dioxide to make sugars. It uses light, carbon dioxide and water to make sugars. It uses heat, carbon dioxide and sugars to make oxygen. It uses sugars and oxygen to make carbon dioxide and ATP. The light-harvesting antennas of chlorophyll are located specifically in the: Thylakoids Cristae Stroma Chloroplast’s outer membrane What is the source of the electrons that reduce NADP during photosynthesis? 02 Water Light ATP A 3—carbon sugar Which of the following steps of photosynthesis can occur in the dark? Conversion of carbon dioxide to organic molecules. Synthesis of ATP. Liberation of oxygen. Synthesis of NADPH. Transfer of electrons to photosystem 1. Cyclic photophosphorylation is called cyclic because: An electron leaving a chlorophyll molecule returns to it All the water used in the process is reconstituted Phosphorus is recycled Hydrogen ions are recycled ATP and ADP are recycled Which of the following statements is not true? Photons are packages of solar energy. The longer the wavelength of light, the more energy it has. Chlorophyll absorbs energy from light. Photons with different energy levels produce different colors. Visible light is a very small portion of the electromagnetic spectrum. B 39. A plant is kept in a dark, sealed container. What would happen to the composition of the gases in the container? a. Oxygen will increase b. Carbon dioxide will increase c. Nitrogen will increase d. All of the above e. None of the above A 40. Which of the following is not a difference between photosynthesis and cellular respiration? a. ATP is produced during respiration but not during photosynthesis. b. Photosynthesis is ultimately powered by light energy; respiration by the chemical energy of fuel molecules c. Photosynthesis consumes C02; respiration consumes 02 d. Photosynthesis produces 02; respiration produces C02 B 41. Carbon dioxide is passed into a solution of bromthymol blue pH indicator until the acid solution turns yellow. A sprig of elodea is than placed into this yellow solution. After a few hours in the sunlight, the yellow solution turns blue. The purpose of this experiment is to show that: a. b. c. d. e. C 42. Oxygen is given off during photosynthesis Carbon dioxide is used during photosynthesis Carbon dioxide is given off as a by—product of photosynthesis Bromthymol blue changes to bromthymol yellow under acid conditions Chlorophyll acting as a photocatalyst is necessary for photosynthesis The difference in soil weight before and after VanHelmont’s growth experiment clearly indicates today that: 9-9.7!” 51> ha: 93. 99.0.69 0 4s :m wgngp Soil itself is unimportant in plant growth. The loss could easily have been an experimental error. Soil materials are important, but in very small quantities. Most of the plants mass must have come from water. All of the above. The molecule produced by both cyclic and noncyclic photo phosphorylation is: ATP. NADPH. O2 Carbohydrates. NAD. In chemiosmosis, energy from electron flow is used to transport to the thylakoid compartment, generating a concentration gradient of Electrons . . . grana . . . H+ H+ . . . grana . . . electrons H+...stroma...H+ Electrons . . . stroma . . . H+ H+ . . . stroma . . . ATP from the D 45. Unlike those of eukaryotes, the electron transport chains of prokaryotes are located in the: ER Nuclear membrane Central vacuole Plasma membrane e. Golgi apparatus 3 46. Once labor begins in childbirth, contractions increase in intensity and frequency until delivery. The increasing labor contractions of childbirth are an example of a bioinforrnatic system. positive feedback. negative feedback. feedback inhibition. enzymatic catalysis. 999‘?” 99.09%» Be sure you have filled in bubbles for your name and PID on your scantrons Be sure you have signed the pledge. If you want to contact me after your score is available, please do the following. 0 Wait 24 hours 0 Check the key on Blackboard under the “tests” button and be sure you have completed all the required information there ...
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This note was uploaded on 11/05/2011 for the course BIOL 101 taught by Professor Hogan during the Fall '08 term at UNC.

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Test 1 with answers - Biol 101 Test 1 — DeSaix Name Print...

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