BIO1130 Midterm2A_11_ans - BIO1130 Midterm Examination –...

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Unformatted text preview: BIO1130 Midterm Examination – November 12, 2011 STUDENT NUMBER:_______________________________ Don’t enter your name. BIO 1130 An Introduction to Organismal Biology Midterm examination Worth either 15% or 20% of your final grade Total points for both parts of the exam is 80 pts Saturday, November 12, 2011 Part B: Written questions a) Place your name and student number in the space provided below. Be sure that your student number is on the top of each of the following pages – the exam will be separated. ONLY place your student number on the pages where indicated b) Answer all questions in the space provided on the exam. Do not transfer answers to the back of the page. c) You may use either pencil of ink for your answers. d) Answers as written paragraphs are preferred but point form is acceptable as long as the points are logically organized and not random statements or facts e) This is not an open book exam. f) There are five pages including this one in part B of the exam, be sure you have all five pages. g) Enter the multiple choice exam code in the space provided Name: __________________________________________ Student number: __________________________________ Multiple Choice Exam Code (MM or FF): _____________ . Page 1 of 5 BIO1130 Midterm Examination – November 12, 2011 STUDENT NUMBER:_______________________________ Don’t enter your name. 12 pts Part 1. Briefly explain what each of the following terms means or the biological contribution made by the person. Where possible include an example in your explanation from a group or an organism to which the term or name applies. Primary endosymbiotic theory {Explanation stating the origin of mitochondria. Mitochondria will be the most common of the two but it is equally appropriate to include plastids/chloroplasts as well. Ideally we should require both but one or the other will be fine}{Nature of the process to be described. For mitochondria and aerobic/ATP/Electron transport bacterium was engulphed, surrounded by membrane or became organelle – for photosynthesis a phototropic bacterium is engulphed}{Result a double membrane or two of own DNA/Own Ribosomes/inner membrane bacterial like} Gametophyte {Part of the alternation of generation life cycle or plant/algae life cycle}{Produces gametes/grows from spores released by sporophyte}{Is haploid organism with multiple cells some of which will produce gametes from the haploid cells} Sporozoite {part of the malaria/Plasmodium life cycle – must not mention plants since this is sporozoite if both mentioned no point}{develop from oocyst in mosquito gut wall}{Found in the Salivary glands of the mosquito host – must state the location in the mosquito host since the parasite can exist in the gut, gut wall or the salivary glands}{Stage that increases numbers of parasites/ Injected in the saliva into the human host} Radial cleavage {8 cell stage/3rd division of the embryo/Division through the center/equator of the 4 cells}{results in four cells sitting directly on top of the four underneath – watch this may be shown with a drawing and that can also generate the mark}{Characteristic of the deuterostomia} Page 2 of 5 BIO1130 Midterm Examination – November 12, 2011 STUDENT NUMBER:_______________________________ Don’t enter your name. 26 pts Part 2: Fill in the missing word, or provide the one word answer in the space provided at the end of the sentence. If the line is missing, add it to the end of the line. 2.1 Sponges are called this type of feeder because they do this to the water that they Filter pump. _________________________ 2.2 An explosion in different types of multicellular animals identifies this era starting Cambrian approximately 540 MYA. _________________________ 2.3 The levels of this greenhouse gas fluctuate dramatically near the end of the Proterozoic Eon alternating between low levels and a frozen planet and high Carbon dioxide levels (Two words). _________________________ 2.4 The number of microtubular strands in the center of either a cilium or a Two/Not 9+2 which is whole structure) flagellum. _________________________ 2.5 Other than lightning, this process is the only way to get nitrogen into organic molecules. (Two Nitrogen fixation words) _________________________ 2.6 Number of different modified sugars that are found in Two peptidoglycan. _________________________ 2.7 The reinforcing material in the bacterial cell wall consists of long chains of polysaccharide Peptide/amino and side chains made of this material. _________________________acids 2.8 Large brown algae, like kelp, are still not considered multicellular because there is no division of labour between the cells beyond specialized cells associated Reproduction with this activity. _________________________ 2.9 Swamp gas, natural gas, and bovine flatulence all have this archaean produced gas in Methane/methanogen common. _________________________ Radula 2.10 The unique molluscan feeding structure. _________________________ 2.11 Sponges are organized at the cellular grade and don't have cells Tissues organized as these. _________________________ 2.12 Bacterial reproduction where plasmids carry pieces of one bacterial genome and combine it Conjugation with another's. _________________________ 2.13 The number of Arthropod phyla that survive the extinction at the end of the Cambrian. Four 2.14 In the bacterial flagellum protons flow through which protein complex when then rotates Motor flagellum. _________________________ Bilateral 2.15 A larval echinoderm has this type of symmetry. _________________________ Page 3 of 5 BIO1130 Midterm Examination – November 12, 2011 STUDENT NUMBER:_______________________________ Don’t enter your name. 2.16 As an antibiotic penicillin affects which part or layer of the bacterial cell Peptidoglycan wall . _________________________ 2.17 This anchors the bacterial flagellum to the biological motor Hook underneath. _________________________ 2.18 The gram positive bacteria have a bilayer of this compound as their Lipid outermost layer. _________________________ 2.19 In this stage of the viral life cycle the viral genome is combined with Lysogenic the bacterial. _________________________ RNA 2.20 Form of the genetic material in a retrovirus. _________________________ Binary fission 2.21 Simple bacterial cell duplication (two words). _________________________ 2.22 The three carbon compound that mitochondria use as a high energy Pyruvate compound. _________________________ 2.23 The term used to describe the side of a medusa opposite Aboral the mouth. _________________________ Ediacaran 2.24 The new geological period that preceeds the Cambrian. _________________________ 2.25 Bacteria that get carbon from organic sources and energy Photoheterotroph from light. _________________________ 2.26 The number of Arthropod phyla that survive the extinction at the end of Four the Cambrian. _________________________ Part three of the exam is on the next page Page 4 of 5 BIO1130 Midterm Examination – November 12, 2011 STUDENT NUMBER:_______________________________ Don’t enter your name. 12 pts Part 3: Answer the following two questions in the space provided. Mesoderm and the coelom were major innovations in Animal architecture. There are two different ways that these form and these differences, in part, define the protostome and deuterostome lineages. Describe how mesoderm and the coelom form in the Protostomia. Mesoderm formation: {Mesoderm cells form at the junction between endoderm and ectoderm cells}{near the opening of the blastopore/mouth}This may be illustrated with a diagram but the diagram must support the two points {Cells proliferate and fill the space between the endoderm and the ectoderm. Coleom formation: {The solid mass of cells splits and cavity forms}{Name for this is schizocoel}{Result is a coelom with mesoderm/muscle associated with gut and body wall/may also mention mesenteries supporting gut} In protists molecular motors are used in locomotion. Describe how the molecular motor works in an amoeba. Two components: {myosin motor fueled by ATP}{Associated with a pseudopod/pseudopodia}{that travels along actin filaments}During movement{Actin filaments polymerize to form ectoplasm for the motor to move along}{Pulls cytoplasmic and other components to cause cytoplasmic flow/description of cytoplasmic flow hyaline cap ecto endo etc} {When actin filaments depolymerize to endoplasm the motor stops} Page 5 of 5 ...
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