Download BIOL 112 Exam II (TAMU LEE) Actual Exam Questions | 100% Correct Answers | Verified 2024 V and more Exams Biology in PDF only on Docsity!
BIOL 112 Exam II (TAMU LEE) Actual
Exam Questions | 100% Correct Answers
| Verified 2024 Version
If a human has a serious bacterial infection, which bacterial target or targets could be useful targets when designing bacterial antibiotics? a. 40S ribosomal subunits b. gyrase c. a peptidoglycan biosynthesis enzyme d. B and C e. A, B and C - โโd. B and C (gyrase, a peptidoglycan biosynthesis enzyme) With regards to modern medicine, pathogenicity and pharmacology, it is very important that one understand one fundamental concept. That concept is that researchers will look for and attack enzymes, polymers, chemicals that the pathogen ____ and that the host ____. a. does not have; does not have b. has; does not have c. does not have; has d. has; has e. none of the above are true - โโb. has; does not have Using the diagram below (malarial life cycle), one could surmise that there are many medical indicators or prodromes (early symptoms) that one may have contracted malaria. The medical sign(s) or condition(s) readily apparent in THIS diagram is/are _______. a. hemolytic anemia or medical condition b. acute hepatic disease, cellular intrustion or medical condition c. dysentary or dysentary-like medical condition
d. legionairres' disease e. Both A and B - โโa. hemolytic anemia or medical condition A hypothetical bacterium swims among human intestinal contents until it finds a suitable location on the intestinal lining. It adheres to the intestinal lining using a feature that also protects it form phagocytes, bacteriophages and dehydration. Fecal matter form a human in whose intestine this bacterium lives can spread the bacterium, even after being mixed with water and boiled. the bacterium is not susceptible to the penicillin family of antibiotics. It contains no plasmids and relatively little peptidoglycan. Adherence to the intestinal lining by this bacterium is due to its possession of ____. a. fimbriae b. a capsule c. pili d. flagellum e. tansulopsule - โโb. a capsule Chloramphenicol is an antibiotic that targets prokaryotic (70S) ribosomes, but not eukaryotic (80S) ribosomes. Which of these questions stems from this observation, plus an understanding of eukaryotic origins? a. if chloramphenicol inhibits prokaryotic ribosomes, should it not also inhibit mitochondrial ribosomes? b. can chlormaphenicol also be used to control human diseases that are caused by archaeans? c. why aren't prokaryotic ribosomes identical to eukaryotic ribosomes? d. can chloramphenicol pass through thecapsules possessed by many cyanobacteria? e. why can't chloramphenicol be used to kill Plasmodium vivax as well - โโa. if chloramphenicol inhibits prokaryotic ribosomes, should it not also inhibit mitochondrial ribosomes? The figure below depicts changes to the amount of DNA present in a recipient cell that is engaged in conjugation with an Hfr cell. Hfr cell DNA begins entering the recipient cell at Time A. Assume that reciprocal crossing over occurs (in other words, a fragment of the recipient's chromosome is exchanged for a homologous fragment from the Hfr cell's DNA). What is occurring at Time C that is decreasing the DNA content?
Which of the following traits do archaeans and bacteria share? a. lack of a nuclear envelope and presence of plasma membrane b. composition of the cell wall c. composition of the cell wall and lack of a nuclear envelope d. presence of plasma membrane and composition of the cell wall e. none of the above are true - โโa. lack of a nuclear envelope and presence of plasma membrane The termite gut protist Mixotricha paradoxa has at least two kinds of bacteria attached to its outer surface. ONe kind is a spirochete that propels its host through the termite gut. A second type of bacteria synthesizes adenosine triphosphate (ATP), some of which is used by the spirochetes. The locomotion provided by the spirochetes introduces the ATP-producing bacteria to new food sources. Which term(s) is (are) applicable to the relationship betweeen the two kinds of bacteria?
- mutualism
- parasitism
- symbiosis
- metabolic cooperation
- metabolic non-cooperation a. 1 and 2 b. 2 and 3 c. 2, 3, and 4 d. 1, 3, and 4 e. 1, 2, and 5 - โโd. 1, 3, and 4 The group bacteria that lack cell walls are the: a. epsilon proteobacteria b. mycoplasmas
c. beta proteobacteria d. chlamydias e. delta proteobacteria - โโb. mycoplasmas Tuberculosis and leprosy are caused by: a. certain members of the supergroup excavata b. certain members of the supergroup "S.A.R" clade c. gram-positive bacteria d. chlamydias e. delta proteobacteria - โโc. gram-positive bacteria Salmonella - responsible for some cases of food poisoning - is a member of: a. certain members of the supergroup excavata b. beta proteobacteria c. gamma proteobacteria d. certain members of the supergroup "S.A.R" clade e. chlamydias - โโc. gamma proteobacteria The gram-positive bacteria are sister taxa with the _____. a. cyanobacteria b. chlamydias c. spirochetes d. delta proteobacteria e. beta proteobacteria - โโa. cyanobacteria
b. ciliates c. parabasalids d. brown algae e. euglenozoans - โโc. parabasalids Look at the diagram below and answer the following question. The genetic exchange just prior to the word "syngamy" may be more aptly described as ___. a. conjugation b. transformation c. transduction d. transfection e. metallica-willie nelson micronuclar exchange - โโa. conjugation All algae are ___. I. eukaryotic II. multicellular III. photosynthetic IV. vascular a. I and II b. I, III and IV c. I and III d. I, II and III e. none of the above - โโc. I and III Certain members of ____ can engage in "immuno bait and switch"
I. Kinetoplastida II. apicomplexa III. dinoflagellata IV. parabasala V. chlorophyta a. I only b. I and II c. I, II and IV d. II and IV e. II, IV and V - โโb. I and II A(n) ____ is a motile, eukaryotic, asexually produced spore that uses a flagellum for locomotion. a. endospore b. zoospore c. capsule d. gametospore e. sporopollenin - โโb. zoospore Many foraminiferans have a multichambered shell called a ___ and exist with endosymbiotic ____. a. test; algae b. stipe; bacteria c. petiole; algae d. chromatophore; algae e. chromatophore; bacteria - โโa. test; algae
II. travel long distances III. stay viable for "extended" periods of time prior to "activation" IV. produced by eukaryotes only V. are multicellular a. I and II b. II, III, IV and IV c. I, III and IV d. I, II and III e. I, II, III and V - โโd. I, II and III The following question refers to the generalized life cycle for land plants shown below. Each number within a circle or square represents a specific plan or plant part, and each number over an arrow represents either meiosis, mitosis or fertilization. In the figure above, which number represents the mature gametophyte generation/organism? a. 3 b. 11 c. 7 d. 1 e. 6 - โโc. 7 Liverworts, hornworts and mosses are grouped together as the bryophytes. Besides not having vascular tissue, what do they all have in common? a. they can reproduce asexually by producing gemmae b. they require water for reproduction c. they are heterosporous d. they are all wind pollinated e. they are all sporophyte dominant - โโb. they require water for reproduction
Archegonia ____. a. may contain sporophyte embryos b. are the sites where male gametes are produced c. have the same function as sporangia d. make asexual reproductive structures e. A and D f. metallica and willie nelson will vote for archegonia in the 2018 midterm elections. Vote fore archegonia! - โโa. may contain sporophyte embryos An organism that produces spores that germinate into protonemata is a ____. a. moss b. fern c. pine tree d. cycad e. rose bush - โโa. moss In vascular plants, ____ conducts most of the water and minerals; including tube-shaped cells called ___ and are strengthened by ___ for structural support. a. phloem; lignin; tracheids b. xylem, lignin; sporopollenin c. xylem, tracheids; lignin d. phloem, lignin, sporopollenin e. none of the above - โโc. xylem, tracheids; lignin A fern is/has:
vigorously, produced healthy, viable (fully functional) flowers in profusion, but set no fruit. Consequently, what is the likely source of the problem? a. failure to produce pollen b. pollination failure c. poor sporophyte viability d. failure to produce fertile ovules e. normal apical meristems - โโb. pollination failure Mechanisms by which seeds can be dispersed is/are: I. wind II. water III. fire IV. animals a. I and IV b. I, II and IV c. II, III and IV d. I, II, III and IV e. II and IV - โโd. I, II, III and IV In onions (Allium), cells of the sporophyte have 16 chromosomes within each nucleus. Match the number of chromosomes present in each of the following onion tissues. How many chromosomes should be in an endosperm nucleus? a. 32 b. 24 c. 8 d. 16
e. 26 - โโb. 24 Gymnosperms and ___ are phylogentically sister taxa. a. angiosperms b. bryophytes c. monilophytes d. anthocerophytes e. cycadophytes - โโa. angiosperms Arrange the following structures from largest to smallest, assuming that they belong to two generations of the same angiosperm.
- ovary
- ovule
- egg
- carpel
- embryo sac a. 5, 4, 3, 1, 2 b. 4, 5, 2, 1, 3 c. 5, 1, 4, 2, 3 d. 4, 1, 2, 5, 3 e. 5, 3, 2, 4, 1 - โโd. 4, 1, 2, 5, 3 Which of the following characteristics are characteristics of monocots? I. one cotyledon II. parallel leaf venation pattern
b. menthol c. quinine d. atropine e. vinblastine f. willie nelson biodiesel bus - โโd. atropine
