BIOLOGY 10-EXAM 1 Spring 2010 Drs. Cartwright and Wiley White Version Please read carefully. This exam consists of 50 multiple choice questions worth two points each (plus one extra credit question). First, be sure your full name (first and last) and student ID are writen on the machine graded answer sheet provided, and blacken the appropriate spaces to code for your name and student ID. Then read each question and al possible answers carefully and select the best answer. Questions are located on the front and back of each sheet. Mark your answers on the machine-graded sheet provided. Turn in your answer sheet when you are finished. You may keep this exam. 1) Which version of the exam do you have? a) white b) pink c) blue d) yelow 2) Hypotheses and theories in science a) can never be absolutely proved but can be shown to be probable. b) gain strength through supporting data. c) can always be revised or even discarded in light of new data. d) al of the above are true. 3) How can you discriminate betwen scientific papers and ?regular? articles? a) Scientific publications are longer. b) Scientists always perform experiments. c) Regular articles are peer-reviewed. d) Scientific papers are peer-reviewed. 4) Which is an example of discovery science? a) The peacock butterfly study. b) The Olestra study. c) Sequencing the human genome. d) Any study that uses the experimental method. 5) The oldest evidence for animal life is in the form of a) Carbon isotopes b) Fossil molecules (biomarkers) c) Fossil bacteria d) Meteorites 6) The atom common to al of life is a) nitrogen b) helium c) calcium d) carbon 7) Which of the following monomers is correctly paired with its polymer? a) A chain of amino acids form proteins b) A chain of monosacharides form DNA c) A chain of triglycerides form carbohydrates d) A chain of nucleotides form lipids 8) Carbohydrates a) are good for energy storage b) are made up of sugars c) are a primary component of the plant cel wal d) al of the above 9) The primary component of the cel membrane is a) carbohydrates b) lipids c) proteins d) nucleic acids 10) What is the basic unit of life? a) an atom b) DNA c) cell d) a human infant 11) Hypotheses in science are a) mere gueses and opinions. b) never based on observations. c) strong when they make predictions that can be tested. d) not very reliable. 12) Which of the following is INCORECT regarding plasma membranes? a) It is composed of a phospholipid bilayer b) Plants do not have plasma membranes c) Controls movement of materials in and out of the cel d) Proteins and sacharides are embedded within them 13) Which of the following is UNIQUE to eukaryotes? a) DNA b) plasma membrane c) mitochondria d) ribosomes 14) Which of the following statements is NOT true of cyanobacteria? a) they have mitochondria b) they are prokaryotes c) they photosynthesize d) they form layers of algal mats caled stromatolites 15) Which of the following is found in a plant cel a) flagelum b) chloroplasts c) lysosomes d) al of the above 16) During which phase of mitosis do the chromosomes line up in the middle of the cel? a) Anaphase b) Telophase c) Prophase d) Metaphase 17) Sister chromatids are a) exact duplicates of chromosomes made in preparation for cel division b) pairs of chromosomes, one inherited from mom, one from dad c) chromosomes inherited from siblings d) the name of a 70s disco band 18) The first cels to evolve were a) 4.0 bilion years old b) anaerobic c) prokaryotic d) al of the above 19) Chloroplasts likely evolved from a) cyanobacteria b) mitochondria c) eukaryotes d) ribosomes 20) Your TA Francine has blood type B. Her mom has blood type O and her Dad has blood type B. What must be Francine?s genotype? a) BB b) AB c) BO d) Francine must have been switched at birth as it is impossible for her to inherit that bloodtype from her parents. 21) Why was it important for Mendel to do a large number of experiments in order to beter understand the basic principles of inheritance? a) He had to keep trying until he got a result that agreed with his hypothesis. b) The larger the number of experiments, the more closely the results of the experiments approximate the actual possible outcomes. c) He needed enough peas to fed al the monks. d) He needed to convince his superiors that he was a hard worker. 22) The three main components of a nucleotide are a) glycerol, faty acid, triglyceride b) glucose, fructose, sucrose c) amino group, carboxyl group, R group d) sugar, phosphate group, base 23) Which of the following function as structural material? a) chitin b) celulose c) keratin d) al of the above 24) Gregor Mendel?s choice organism for the study of genetics was: a) Birds b) Pea plants c) Humans d) Sperm and egg 25) Mendel?s theory of segregation states that a) The cel is the smalest unit of life b) Diferent pairs of aleles (genes) asort independently of one another. c) tal plants don?t mate with dwarf plants d) Each gamete (eggs and sperm) only gets one copy of a gene. 26) Which of the following are NOT used for energy? a) sucrose b) DNA c) fats d) starch 27) How is genetic variation produced? a) crossing over b) independent asortment of aleles c) fertilization d) al of the above 28) How many chromosomes are in your skin cels? a) 2n = 23 b) 2n = 46 c) n = 46 d) n=92 29) A woman and a man both have dimples. Dimples are a dominant trait (D). They have three kids and one of the kids doesn?t have dimples. What is the genotype for mom? a) DD b) Dd c) dd d) cannot tel based on the given information 30) Science is a) a way of knowing that seks natural explanations for phenomena. b) a way of addresing the supernatural. c) the best way of organizing society. d) the best way to understand everything. 31) In fruit flies, curly wings (C) is a dominant trait over straight wings (c). A homozygous dominant male is crossed with a heterozygous female. What is the probability that their offspring wil have straight wings? a) 100% b) 50% c) 25% d) 0% e) 32) In a strain of corn, high sugar content (S) is dominant to low sugar content (s) and yelow kernels (Y) is dominant to white kernels (y). A farmer crosses two corn plants of the same genotype, both with high sugar content and yelow kernels. The resulting F1 offspring has the phenotypic ratio of 9:3:3:1 (high sugar/yelow kernels: high sugar/white kernels, low sugar/yelow kernels: low sugar/white kernels. What genotype were the parent plants? a) SSYY b) syy c) SsYy d) SSYy 33) The odds that non-identical siblings wil have the same genetic makeup is infinitesimaly smal. This can be explained by: a) fertilization is random. b) Mendel?s theory of independent asortment. c) both of the above. d) none of the above. 34) The alele for black coat in gerbils (B) is INCOMPLETELY dominant over the alele for white coat (b). If a true breeding gerbil with a black goat is mated with a true breeding gerbil with a white coat, what is the probability that their offspring wil have grey coats? a) 100% b) 50% c) 25% d) 0% 35) A man becomes bald in his twenties due to an inherited trait. He also has a genetic basis for turning gray. The masking of the graynes by his early baldnes is an example of: a) incomplete dominance b) epistasis c) codominance d) environmental efects 36) We looked at a study that tested the hypothesis that Olestra caused stomach cramps. What is the null hypothesis we are testing when we fed 600 people a bag of potato chips made with Olestra and another 600 people potato chips that do not contain Olestra. a) Ingestion of Olestra causes stomach cramps. b) Ingestion of Olestra causes no greater frequency of stomach cramps than ingestion of regular potato chips. c) Ingestion of regular potato chips causes stomach cramps. d) Ingestion of Olestra causes a greater frequency of stomach cramps than ingestion of potato chips. 37) In that experiment, which was the control group? a) The people that were given potato chips made with Olestra b) The people that were given no potato chips at al c) The people that were given regular potato chips d) None of the above, there was no need for a control group. 38) A mutation on the NEMO gene located on the X chromosome can result in skin rashes and scarring, neurological, ophthalmological, and odontological problems. The NEMO gene is an example of a) Pleiotropy b) Epistasis c) Polygenic inheritance d) Codominance 39) The kity and bunny below have a mutation in a melanin production gene that can?t produce pigment and higher temperatures. Their pigment coat only at extremities is a result of a) environmental efects b) pleiotropy c) codominance d) incomplete dominance 40) Which of the following would NOT occur during prophase? a) nuclear membrane disappears b) centrioles move toward opposite poles of the cel c) chromosomes are replicated d) spindle begins to form 41) Lipid synthesis occurs in which organele a) the nucleus b) smooth endoplasmic reticulum c) ribosomes d) The Golgi 42) Which of the following does not contain phospholipids a) cel membrane b) The Golgi c) ribosomes d) rough endoplasmic reticulum 43) ____________ is the proces by which two identical daughter cels are formed from a single parent cel. a) Meiosis b) itosis c) Cytokinesis d) Fertilization 44) In the human body, al of the cels are diploid, except _____________? a) gametes b) stomach cels c) cel of the uterus d) al of the above are diploid 45) Which of the following does not occur during Interphase? a) G2 b) chromosome duplication c) mitosis d) cel growth 46) Which correctly describes the order of mitotic events? a) Interphase, Telophase, Anaphase, Metaphase b) Prophase, Metaphase, Anaphase, Telophase c) Anaphase, Metaphase, Telophase, Interphase d) Anaphase, Prophase, Metaphase, Telophase 47) During which phase of mitosis does the nuclear membrane reform? a) Anaphase b) Telophase c) Prophase d) Metaphase 48) A centromere is a) an organele that produces the spindle fibers b) the region physicaly joining two sister chromatids c) the middle of a cel d) a component of a plant cel wal 49) During which phase of meiosis does exchange of genetic material (crossing over) occur betwen homologous chromosomes? a) Prophase I b) Metaphase I c) Prophase II d) Metaphase II 50) Acording to Mendel, diferent pairs of aleles asort independently of one another. When does this occur in meiosis? a) Prophase I b) Metaphase I c) Prophase II d) Metaphase II 51) When are cels reduced from a diploid state to a haploid state? a) Mitosis b) eiosis I c) Meiosis II d) Fertilization Paulyn Cartwright Exam1WhiteKey2
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