Download SR 50(4) 42-43 (Test Your Knowledge)

Test Your Knowledge
N. THIRUMANJOLAI
KNOW THE MICROBIAL WORLD
1. Which of the following is the study of fungi?
a) Phycology
b) Mycology
c) Protozoology
d) Bacteriology
12. Which of the following is an incorrect pair?
a) Volutin-phosphate
b) Starch-energy
c) Magnetosome-energy d) Lipid-energy
2. An object measures 0.5 mm in length. How many micrometers long is it?
a) 500 micrometers
b) 50 micrometers
c) 5000 micrometers
d) 0.005 micrometers
13. Which metabolic pathway is common to both fermentation
& cellular respiration?
a) Krebs cycle
b) Glycolysis
c) Electron transport chain
d) Synthesis of Acetyl coA from pyruvate
3. Which of the following types of microscopy creates a three
dimensional effect?
a) Brightfield
b) Differential interference contrast
c) Darkfield
d) Florescence
14. In a prokaryotic cell most of the enzymes of the Krebs cycle
are located in the:
a) Plasma membrane
b) Cytoplasm
c) Mitochondrial membrane
d) Mitochondrial matrix
4. After the decolorizer has been applied during a Gram stain,
but before the safranin has been applied, a gram-negative
cell would appear___
a) Purple
b) Pink
c) Colorless
d) Blue
15. The light reaction of photosynthesis supplies the light-independent reactions with:
a) Light energy
b) CO2 & ATP
c) Sugar & O2
d) ATP & NADPH
5. Which of the following is not true of prokaryotic cells?
a) They have a plasma membrane
b) They have DNA
c) They divide by binary fission
d) They have nuclei
16. Which is the final electron acceptor during lactic acid fermentation?
a) Lactic acid
b) ATP
c) NAD+
d) Pyruvate
6. Which of the following types of membrane transport requires
energy to be input from the cell?
a) Simple diffusion
b) Active transport
c) Osmosis
d) Facilitated diffusion
17. Which of the following do chemolithoautotrophs & photosynthetic organisms have in common?
a) Electron transport chains b) Calvin – Benson cycle
c) Light as a source of energy
d) Both a & b are correct
7. Which of the following types of membrane transport occurs
only in prokaryotic cells?
a) Osmosis
b) Simple diffusion
c) Group translocation
d) Active transport
18. An organism that has an optimum temperature of 50° C is
a:
a) Mesophile
b) Thermophile
c) Psychrophile
d) Psychotroph
8. Which of the following types of membrane transport occurs
only in eukaryotic cells?
a) Simple diffusion
b) Endocytosis
c) Active transport
d) Facilitated diffusion
19. An organism that uses oxygen if it is available but can
survive without it if it is not available is an:
a) Obligate aerobe
b) Micro aerophile
c) Facultative anaerobe
d) Aerotolerant anaerobe
9. Which of the following correctly describes a cluster of spherical cells?
a) Streptococci
b) Staphylococci
c) Vibrio
d) Streptobacilli
20. Which of the following is not a macronutrient?
a) Carbon
b) Sulfur
c) Nitrogen
d) Zinc
10. Which component of the Gram negative cell wall is responsible for resistance to some antibiotics & disinfectants?
a) Lipid A
b) 0-polysaccharide
c) Porins
d) Teichoic acids
11. Which of the following correctly describes movement away
from light?
a) Positive chemotaxis
b) Positive phototaxis
c) Negative chemotaxis
d) Negative phototaxis
SCIENCE REPORTER, APRIL 2013
Answers:
1. b 2. a
3. b
4. b
5. d
6. b
7. c
8. b
9. b 10. c
11. d 12. c 13. b 14. b 15. d 16. d 17. d 18. b 19. c 20. d
Contributed by N. Thirumanjolai, Panayankulam, Puluvoikarai (PO), Thiruppuvanam
(Via), Sivaganga (DT)
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Test Your Knowledge
TITARAM NANDA BRAHMACHARI
FUNDAMENTALS OF TOXICOLOGY
1. What is toxicology?
a) The study of poison
b) The study of chemicals or physical agents
c) The study of toxicants
d) The study of the adverse effect of the chemical and physical agents on living organisms
2. Who is the father of toxicology?
a) Hippocrates(460BC-370BC)
b) Alexandre Dumas (1802-1870)
c) Mathieu Orfila (1787-1853)
d) Paracelsus (1493-1541)
3. The first research institute of toxicology in India is located at
a) Uttar Pradesh (Lucknow)
b) Madhya Pradesh (Bhopal)
c) Andhra Pradesh (Hyderabad)
d) Arunachal Pradesh (Itanagar)
4. Any substance that is an agent directly involved and causing cancer is called
a) Genotoxic carcinogen
b) Epigenetic carcinogen
c) General grade carcinogen
d) Carcinogen
5. Father of forensic toxicology
a) Mathieu Orfila (1787-1853)
b) Paracelsus (1493-1541)
c) Claude Bernard (1813-1878)
d) Francois Mogendie (1783-1855)
6. Who said “No substance is a poison by itself, it is the dose
that makes a substance a poison”?
a) Hippocrates (460BC-370BC)
b) Paracelsus (1493-1541)
c) Aristotle (384BC-322BC) d) None of these
7. Treatment on exposure to acute dose of mercury involves:
a) N-acetyl-D,L Penicillamine (NAP)
b) British Anti Lewisite (BAL)
c) 2,3 – dimercapto - 1- Propanesulfonic acid (DMPS)
d) Dimercapto succinic acid (DMSA)
e) All of the above
8. Minamata disease is caused due to poisoning with
a) Cadmium
b) Arsenic
c) Lead
d) Methyl mercury
9. Toxicity is not affected by
a) Irradiation
b) Caging
c) Sex
d) None of the above
10. Which of the following is a neurotoxicant
a) Organophosphate
b) Organochlorine
c) Carbamates
d) All of the above
11. The process by which xenotoxics cross body membrane and
enter the blood stream is referred as
a) Transformation
b) Accumulation
c) Distribution
d) Absorption
12. Which bioindicator indicates high level of sulphur dioxide,
sulphur based pollutants and nitrogen oxide in the environment
a) Copepods
b) Lichen
c) Anabas
d) Crustacean
13. The occupational disease Bagassosis is caused due to exposure to
a) Iron
b) Nickel
c) Coal dust
d) Sugarcane dust
14. Caffeine ___________?
a) Is the nitrogenous organic compound of the alkaloid group
b) Is a substance with marked physiological effects
c) Occurs in tea, coffee, guarana, mate, kolanuts and cacao
d) All of these
15. Yusho disease is caused due to ____________ poisoning?
a) PCB
b) Mercury
c) Cadmium
d) PAH
16. The toxicants are directly administered into the blood stream
through
a) Intraperitoneal route
b) Subcutaneous route
c) Muscular route
d) Intravenous route
17. Which drug causes Leukemia and sarcoma?
a) Sedative – hypotics
b) Anticonvulsants
c) Anti-parkinsonian
d) Azothioprine
18. Which of the following is called “store house of xenobiotics”
a) Gall bladder
b) Kidney
c) Lungs
d) Liver
19. The biomarker protein oct-4 is used in
a) Cell biology
b) Medicine
c) Biological process
d) Ecotoxicology
20. The average cup of tea contains __________ mg of caffeine
a) 40
b) 100
c) 30
d) 60
Answers:
1. d 2. d
3. a
4. d 5. a
6. b
7. e
8. d 9. d 10. d
11. d 12. b 13. d 14. d 15. a 16. d 17. d 18. d 19. a 20. d
Contributed by Titaram Nanda Brahmachari, Department of Environmental
Science, Fakirmohan University, Nuapadhi, Mitrapur, Balasore, Odisha;
Email: [email protected]
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SCIENCE REPORTER, APRIL 2013