rizzo3b - BIOL 111-510-519 Instructor: Dr. Rizzo (Name)...

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Unformatted text preview: BIOL 111-510-519 Instructor: Dr. Rizzo (Name) (U.I.N.) Exam III Form B (Wednesday, April 9) INSTRUCTIONS: 1. Sign your name in the space marked “SIGNATURE” at the bottom of this page. NOTE: Enter your name and U.I.N. at the top of this page Because these forms are computer graded, it is extremely important that the following information is correct. Please check your responses. Print your last name, first and middle initials in the appropriate boxes on the scantron. Darken the corresponding spaces under your name. Enter your UIN — Universal Identification Number in the space for Social Security Number on the scantron. Darken the corresponding spaces under your U.I.N. Sign the scantron. Bubble and write in under test form on your scantron the letter B. If your scantron does not match your exam, you may receive a failing grade. Please check that you have 40 questions. ALWAYS CHOOSE THE BEST ANSWER. B An Aggie does not lie, cheat or steal, or tolerate thOSe who do. On my honor, as an Aggie, l have neither given nor received unauthorized aid on this academic work. Your Signature © 2008 Texas A&M University Biology Department. Unauthorized use of this material is a Violation of federal law. Introductory Biology B111 Dr. Rizzo Spring 2008 Exam III, Form B Read all choices carefully, and choose the BEST answer. All questions are from B111 lecture and should be answered as such. Finally, the correct interpretation of a question is considered as part of choosing the correct answer. 1 Which of the following types of cell signaling contains a phosphorylation cascade? (A) steroid hormone action (B) cyclic AMP-mediated hormone action (C) the activation of a specific gene by growth factor (D) both A and B above (E) both B and C above 2 Which of the following destroys cyclic AMP? (A) G—protein (B) adenylyl cyclase (C) protein kinase (D) phosphodiesterase (E) phosphorylase phosphatase 3 In regard to steroid hormone action, where in the cell is the steroid hormone—receptor complex first formed? (A) extracellular fluid )3) plasma membrane (C) cytosol (D) nuclear membrane (E) inside the nucleus 4 Which of the following enzymes synthesizes cyclic AMP (cAMP)? (A) adenylyl cyclase (B) phosphodiesterase (C) phosphorylase kinase (D) protein kinase (E) CAMP synthase . 5 Which of the following enzymes removes glucose from glycogen one unit at a time? (A) adenylyl cyclase (B) protein kinase (C) phosphorylase kinase (D) glycogen phosphorylase (E) glycogen phosphatase 6 In the hypothetical sequence for the evolution of mitosis, which of the following organisms was used as a possible evolutionary intermediate between prokaryotes and most eukaryotes? (A) dinoflagellates (B) diatoms (C) yeast (D) both A and B above (E) A, B and C above 7 What is the result of fusing a cell in M—phase with a cell in Gl—pahse? (A) chromosome decondensation in the M—phase cell (B) onset of DNA synthesis in the Gl—phse cell (C) onset of mitosis in the Gl—phase cell (D) onset of mitosis in the M—phase cell (E) chromosome decondensation in the Gl—phase cell 8 How many different checkpoints are there in the mechanical analogy for the cell cycle control system? (A) one (B) two (C) three (D) four (E) five 9 In regard to molecular control of the cell cycle at the G2 checkpoint, how is cyclin degraded? (A) MPF activates a cyclin-specific protease by phosphorylation (B) MPF activates a cyclin-specific protease by dephosphorylation (C) nonspecific proteases eventually degrade it (D) cyclin is not degraded, but instead it is inhibited by dephosphorylation (E) cyclin is not degraded, but instead it is inhibited by phosphorylation 10 Similarly, how is cyclin restored for the next cell cycle? (A) it is phosphorylated (B) it accumulates from new protein synthesis (C) it is dephosporylated (D) it binds to Cdk (E) it binds to MPF 11 What is the total number of chromosomes per somatic cell, for a diploid organism whose gametes each contain 8 chromosomes? (A) four (B) eight (C) two (:3) 16 (E) 32 12 During which stage of meiosis does crossing over occur? (A) prophase II (B) anaphase II (C) prophase I (D) anaphase II (E) metaphase II 13 You are given a pea plant with purple flowers. How can you decide if it is homozygous or heterozygous if purple is dominant over white? (A) cross it with a purple-flowered pea plant and check the F1 offspring (B) cross it with a white-flowered pea plant and check the F1 offspring (C) cross it with a purple—flowered pea plant and check the F2 offspring (D) cross it with a white—flowered pea plant and check the F2 offspring (E) there is no way you can find out, because you don't know the P generation 14 Consider the genetic cross of two black dihybrid mice, each heterozygous for two genes that assort independently, as discussed in class for the example of epistasis, (Bch X Bch). What is the phenotype of the F2 generation resulting from this cross? (A) all black (B) three black/one brown (C) nine black/three brown/4 white (D) nine brown/six black/one white (E) nine black/six brown/one white 15 Which of the following offers a genetic explanation for the "tortiseshell cat”? (A) multiple alleles (B) incomplete dominance (C) sex— linked genes (D) epistasis (E) x chromosome inactivation 16 During which stage of meiosis do sister chromatids separate? (A) prephase I (B) anaphase I (C) prophase II (D) anaphase II (E) metaphase II 17 In regard to the discussion of sex—linked inheritance, in which a female red—eyed fly was crossed with a male white—eyed fly. Which of the following were seen in the results of the F2 generation? (A) all females had red eyes (B) the males were half red-eye, and half white—eye (C) the white eye phenotype was seen only in the males (D) both A and B above (E) A, B and C above 18 In regard to alterations of chromosome structure, which of the following was discussed in class as examples of the phenomenon known as "position effect"? (A) deletion (B) duplication (C) inversion (D) both A and B above (E) A, B and C above 19 In regard to nondisjunction, what is the difference between the occurrence of nondisjunction in meiosis I, as opposed to meiosis II? (A) all abnormal gametes for meiosis I, and half normal/half abnormal for meiosis II (B) all abnormal gametes for both meiosis I and II (C) half normal/half abnormal for both meiosis I and II (D) all abnormal gametes for meiosis II, and half normal/half abnormal for meiosis I (E) all normal gametes for both meiosis I and II 20 What is the phenotypic ratio of flower color when the F1 generation (resulting from the cross of P Generation pea plants of purple X white flowers) are allowed to self-pollinate to form the F2 Generation? (A) all purple (B) three purple/one white (C) two purple/two white (D) all white (E) all light purple 21 What is the allele content on a pair of homologous chromosomes with a heterozygous genotype at the locus for flower color in peas? (A) two alleles for purple flowers (B) two alleles for white flowers (C) one allele for purple, and one allele for white flowers (D) two alleles for purple and two alleles for white (E) one allele for red and one allele for white 22 Which of the following represents the phenotypic ratio of the F2 generation cross of two P generation pea plants (YYRR X yyrr), as discussed in class (complete dominance and independent assortment)? (A) all yellow/round (B) half yellow/round, half green/wrinkled (C) all green/wrinkled (D) 9/16 yellow/round: 5/16 green/wrinkled (E) 9/16 yellow/round: 3/16 green/round: 3/16 yellow/wrinkled: 1/16 green/wrinkled 23 Choose the proper genetic term for an additive effect of two or more genes on one character? (A) polygenic inheritance (B) pleiotropy (C) epistasis (D) codominance (E) incomplete dominance 24 Choose the proper genetic term for a situation in which you get multiple phenotypic effects from one gene? (A) polygenic inheritance (B) pleiotropy (C) epistasis (D) codominance (E) incomplete dominance 25 Why is blood group "O" referred to as the "universal donor" in regard to blood transfusions? (A) individuals in this blood group have no alleles at the blood group locus (B) individuals in this blood group do not make antibodies to blood group antigens (C) individuals in this blood group have no blood group antigens (D) they exhibit codominance (E) they exhibit incomplete dominance 26 Which of the following does the ABO blood group exemplify? (A) multiple alleles (B) incomplete dominance (C) pleiotropy (D) polygenic inheritance (E) both A and B above 27 In the example of incomplete dominance in snapdragons, what is the phenotypic ratio of the F1 generation? (A) one red/two pink/one white (B) three red/one white (C) three pink/one white (D) all pink (E) all red _ 28 For the comparison of mitosis and meiosis, what is the ploidy level of the daughter cells of meiosis I? (A) diploid, sister chromatids remain together (B) diploid, sister chromatids separated (C) haploid, sister chromatids remain together (D) haploid, sister chromatids separated (E) tetraploid,sister chromatids remain together 29 Which of the following is the best definition of crossing over? (A) exchange of chromosome segments between sister chromatids of homologous chromosomes (B) exchange of chromosome segments between nonsister chromatids of homologous chromosomes (C) exchange of chromosome segments between sister chromatids of nonhomologous chromosomes (D) exchange of chromosome segments between nonsister chromatids of nonhomologous chromosomes (E) synapsis of homologous chromosomes 30 What is the proper term for the site of crossing over? (A) chiasma (B) synapsis (C) tetrad formation (D) locus (E) allele 31 Which of the following stages of meiosis is characterized by centrosomes at opposite poles, tetrads paired, nuclear envelope gone, and spindle fully formed? (A) prophase I (B) prophase II (C) metaphase I (D) metaphase II (E) anaphase I 32 In regard to the growth of a malignant breast tumor, what is the proper term given to describe the spreading of cancer cells from the local tumor to other parts of the body? (A) contact inhibition (B) density—dependent inhibition (C) anchorage dependence (D) invasive ability (E) metastasis 33 Which of the following are produced during noncyclic photophosphorylation? (A) ATP (B) oxygen (C) NADPH (D) A and B above (E) A, B and C above 34 Which of the following are produced during cyclic photophosphcrylation? (A) ATP (B) NADPH (C) oxygen (D) both E and C above (E) A, B and C above 35 What is considered to be the first product of carbon fixation in the Calvin Cycle? (A) glyceraldehyde 3—phosphate (B) 3—phosphoglycerate (C) glucose (D) RuBP (E) pyruvate 36 In which of the following plant cell types do most of the light reactions of photosynthesis occur? (A) guard cell (B) epidermal cell (C) stomatal cell (D) ectoderm cell (E) mesophyll cell 37 In the light reactions of photosynthesis, what (directly) passes electrons to photosystem II? (A) plastocyanin (pc) (B) plastoquinone (pg) (C) ferredcxin (D) water (E) cytochrome complex 38 In the Calvin Cycle, what is the carbon dioxide "fixed" onto in phase I (carbon fixation)? (A) 3—phosphoglycerate (B) glyceraldehyde 3—phosphate (C) RuBP (ribulose bisphosphate) (D) pyruvate (E) rubisco 39 Which of the following occurs when an excited electron in chlorophyll is allowed to drop back down to its ground state following photon capture? (A) a photon is produced that has a shorter wavelength than the "exciting" photon (B) a photon is produced that has a longer wavelength than the exciting photon (C) a photon is produced that has the same wavelength as the exciting photon (D) a photon is produced that has more energy than the exciting photon (E) no photon is produced in this process 40 In regard to chemiosmosis in the chloroplast, where do the hydrogen ions accumulate to set up the proton gradient? (A) stroma (B) space between the outer and inner chloroplast membranes (C) thylakoid membrane (D) thylakoid space (E) both A and B above KEY , FORM B I I WOOUUID'OUM HEIDI um I—IHKOGJ-Jmmnbwwl-I I I I—II—-I—- astute I own 15-E 16—D l7-E 18—C 19uA ZO—B 21-C 22—E 23-A 24—B 25—C 26—A 27—D 28—C 29—B 30~A 31—C 32—E 33-E 34—A 35—B 36~E 37-D 38uC 39—B 40-D ...
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This note was uploaded on 04/27/2008 for the course BIOL 111 taught by Professor Rizzo during the Spring '07 term at Texas A&M.

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rizzo3b - BIOL 111-510-519 Instructor: Dr. Rizzo (Name)...

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