Genetics Test 1

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kingbken
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123554
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Genetics Test 1
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2011-12-14 00:21:55
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Genetics Test
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Genetics Test 1
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  1. Who is generally credited with the discovery of cells?
    A. Virchow
    B. Schleiden
    C. Schwann
    D. Hook
    E. Leeuwenhock
    D. Hooke
    (this multiple choice question has been scrambled)
  2. Which of the following is a tenet of the Cell Theory?
    1) All organisms are composed of one or more cells.
    2) The cell is the structural unit of life.
    3) Cells can arise only by division from a preexisting cell.
    4) Cells divide only by fission.

    A. 1
    B. 4
    C. 2
    D. 1,2, and 3
    E. 3
    D. 1,2 and 3
    (this multiple choice question has been scrambled)
  3. Which of the following are not considered to belong to the Archaea?
    A. Methanogens
    B. Thermophiles
    C. Halophiles
    D. Eubacteria
    E. Acidophiles
    D. Eubacteria
    (this multiple choice question has been scrambled)
  4. The endosymbiont theory suggests that chloroplasts evolved from symbiotic cyanobacteria. Which other organelle may have originated in a similar way?
    A. vacuoles
    B. ribosomes
    C. endoplasmic reticulum
    D. mitochondria
    D. mitochondria
    (this multiple choice question has been scrambled)
  5. What characteristics distinguish prokaryotic and eukaryotic cells?
    A. Prokaryotes have relatively little DNA; eukaryotes generaly have much more.
    B. Prokaryotic DNA is naked or nearly naked; eukaryotic DNA is usually heavily associated with protein.
    C. Eukaryotes have membrane-bound organelles; prokaryotes do not.
    D. All of these are correct.
    E. Eukaryotic chromosomes are linear; prokaryoti chromosomes are circular.
    D. Al of these are correct
    (this multiple choice question has been scrambled)
  6. The genetic material of a prokaryotic cell is present in a ____, a poorly demarcated region of the cell that lacks a boundary membrane to separate it from the surrounding cytoplasm.
    A. chromatic region
    B. pharmacopeia
    C. genetome
    D. nucleus
    E. nucleoid
    E. nucleoid
    (this multiple choice question has been scrambled)
  7. The process by which a relatively unspecialized cell becomes highly specialized is called
    A. differentiation
    B. determination
    C. denaturation
    D. renaturation
    E. degeneracy
    A. differentiation
    (this multiple choice question has been scrambled)
  8. Which of the following is NOT a model organism?
    A. Mus musculus
    B. homo sapiens
    C. Drosophila melanogaster
    D. Arabidopsis thaliama
    E. Caemorhabditis elegans
    B. homo sapiens
    (this multiple choice question has been scrambled)
  9. The field of biological research in which biologists are attempting to create a living cell in the laboratory, essentially from scratch is known as ___. More modestly, this branch of biology also has a goal of developing novel life forms, beginning with existing organisms, tat have a unique value in medicinde, industry or in cleaning up the environment.
    A. synthetic biology
    B. industrial biology
    C. megalomaniacal biology
    D. production-grade biology
    E. pharmaceutical biology
    A. synthetic biology
    (this multiple choice question has been scrambled)
  10. The most electronegative atoms typically present in biological molecules are ___ and ___.
    A. C,N
    B. O,N
    C. C, Na
    D. O,C
    E. O,P
    B. O,N
    (this multiple choice question has been scrambled)
  11. A molecule that is capable of releasing or donating a hydrogen ion is termed a(n) _____.
    A. anachronism
    B. acid
    C. base
    D. pain
    E. hydrion
    B. acid
    (this multiple choice question has been scrambled)
  12. The presently accepted model of enzyme action was proposed in the 1960s and suggests that the enzyme is a flexible structure with an active site roughly complementary to the subtrate that binds it. Ater its initial interaction with the substrate, the enzyme alters its shape and thus improves the fit of the substrate in the active site. What is the name of this mode?
    A. Induced Fit Model
    B. Flexible Fit Model
    C. Lock and Key Mode
    D. flexible Sponge Model
    E. Koshland Model
    A. Induced Fit Model
    (this multiple choice question has been scrambled)
  13. What kind of enzyme adds phosphate groups to enzymes for the purpose of activating or deactivating them?
    A. protein kinases
    B. phosphates
    C. carboxypeptidase
    D. flippases
    E. glycosyltransferases
    A. protein kinases
    (this multiple choice question has been scrambled)
  14. If an antibiotic were found to bind a site on an essential bacterial enzyme other than the active site, it is most likely a noncompetitive inhibitor.
    a. True
    b. False
    a. True
  15. Which of the following pathways is/are most like to use NADPH?
    1) glycolysis
    2) TCA
    3) photosynthesis
    4) gluconeogenesis
    A. 1 and 4
    B. 1 and 3
    C. 2 and 4
    D. 1 and 2
    E. 3 and 4
    E. 3 and 4
    (this multiple choice question has been scrambled)
  16. Which of the following is a nucleotide?
    A. phosphate + ribose
    B. adenine + deoxyribose
    C. adenine + ribose + phosphate
    D. sugar + nitrogenous base
    C. adenine + ribose + phosphate
    (this multiple choice question has been scrambled)
  17. If you were brewing beer at home, why would you probably make it in an airtight container?
    A. to encourage glycolysis, which doesnt need oxygen
    B. B and C
    C. to keep your roommates from tasting it before it is completely fermented
    D. to encourage fermentation, which only occurs in the absence of oxygen
    E. because the instructions tell you do make it in an airtight container
    D. to encourage fermentation, which only occurs in the absence of oxygen
    (this multiple choice question has been scrambled)
  18. A reaction involving the gain of one or more electron is a(n) ___ reaction.
    A. reduction
    B. inclusion
    C. elimination
    D. None of these are correct
    E. oxidation
    A. reduction
    (this multiple choice question has been scrambled)
  19. What is now thought to have been the genetic material in the first living organism on Earth?
    A. polypeptides
    B. protein
    C. RNA
    D. DNA
    C. RNA
    (this multiple choice question has been scrambled)
  20. What tye of protein secondary structure is characterized as being highly extensible because of its coiled structure?
    A. alpha-helix
    B. double helix
    C. beta-pleated sheet
    D. supercoiling
    A. alpha-helix
    (this multiple choice question has been scrambled)
  21. Proteins are often composed of two or more distinct modules that fold up independently of one another. They often represent parts of a protein that function in a semi-independent manner. these modules are called ____.
    A. functional
    B. dominoes
    C. protein motifs
    D. domains
    D. domains
    (this multiple choice question has been scrambled)
  22. In what ways can a given solute get through a membrane?
    1) The solute can pass through the bilayer
    2) The solute can pass through cholesterol.
    3) The solute can pass through an aqueous channel.
    4) The solute can pass through a pore.
    A. 1,3, and 4
    B. 2
    C. 3
    D. 1
    E. 4
    A. 1, 3, and 4
    (this multiple choice question has been scrambled)
  23. Which proteins move the fathesy during SDS-polyacrylamide gel electrophoresis?
    A. the most negative
    B. the most positive
    C. both the largest and the most negative
    D. the largest
    E. the smallest
    E. the smallest
    (this multiple choice question has been scrambled)
  24. Which protein in the red blood cell membrane appears to be responsible for the exchange of bicarbonate ions and chloride ions across the red blood cell membrane?
    A. glycophorin D
    B. alpha-actinin
    C. band 3
    D. glycophorin A
    E. glyceraldehydes 3-phosphate
    C. band 3
    (this multiple choice question has been scrambled)
  25. _____ is the movement of a substance from an area of high concentration to an area of low concentration
    A. denaturation
    B. osmosis
    C. defusion
    D. transport
    E. difussion
    E. diffusion
    (this multiple choice question has been scrambled)
  26. What enzyme is responsible for the destruction of a type of free radical formed when molecular oxygen picks up an extra electron?
    A. superoxide dismutase
    B. aldolase
    C. hexokinase
    D. kinase
    A. superoxide dismutase
    (this multiple choice question has been scrambled)
  27. What animal disease gives its name to the abnormal/prion form of PrPc?

    A. Creutzfeld-Jakob
    B. scrapie
    C. Kuru
    D. mad cw disease
    B. scrapie
    (this multiple choice question has been scrambled)
  28. People who have the AB blood type posses ____.
    1) an enzyme that adds an N-acetylgalactosamine to the end of the oligosaccharide chaon on RBC membrane glycolipids
    2) an enzyme that adds a galactose to the end of the oligosaccharide chain on RBC membrane glycolipids
    3) an enzyme that adds phospholipids to the end of the oligosaccharide chain on BBC membrane glycolipids
    4) no enzymes capable of adding galactose or N- acetylgalactosamine to the end of the oligosaccharide chain on RBC membrane glycolipids
    A. 2
    B. 3
    C. 1 and 2
    D. 4
    E. 1
    C. 1 and 2
    (this multiple choice question has been scrambled)
  29. In what ways are Creutzfeld-Jakob and Alzheimer's disease similar?
    A. both involve misfolded protein
    B. both diseases involve the same protein.
    C. Both affect the same part of the brain
    D. both can be caused by a protein that behaves like an infectious agent.
    e. All of the above.
    A. both involve misfolded protein.
    (this multiple choice question has been scrambled)
  30. If mice are maintaind on vert strict diets with reduced caloric intake, what happens to their life span as compared to littermates fed diets with normal caloric content?
    A. The mice fed a normal caloric content live longer
    B. The mice fed a reduced caloric intake live longer.
    C. there is not difference in the life spans between the two groups.
    d. None of the above
    B. The mice fed a reduced caloric intake live longer.
    (this multiple choice question has been scrambled)
  31. While culturing some cells, you lower the temperature of the culture. What happens immediately to the membrane fluidity?
    A. Nothing happens
    B. The membrane fluidity fluctuates back and forth from high to low.
    C. The membrane fluidity fluctuates back and forth from low to high.
    D. The membrane becomes less fluid.
    E. The membrane beomes more fluid.
    D. the membrane becomes less fluid
    (this multiple choice question has been scrambled)
  32. What kind of membrane protein is found entirely outside the bilayer on either the extracellular or cytoplasmic surface? These proteins are covalently linked to a membrane lipid situated within the bilayer.
    A. carbohydrate-anchored protein
    B. transmembrane
    C. peripheral proteins
    D. lipid-anchored protein
    E. integral protein
    D. lipid-anchored protein
    (this multiple choice question has been scrambled)
  33. What kind of interaction is not involved in the binding of a subtrate to a normally functioning enzyme?
    A. ionic bonds
    B. H bonds
    C. a permanent convalent bond
    D. a transient covalent bond
    E. hydrophobic interaction
    C. a permanent convalent bond
    (this multiple choice question has been scrambled)
  34. Glycolysis occurs in the ____; the Krebs (TCA) cycle occurs in the ___ of eukaryotes and the ___ of prokaryotes.
    A. mitochondria, cytoplasm, mitochondria
    B. cytoplasm, photosynthesis, cytoplasm
    C. cytoplasm, mitochondria, cytoplasm
    D. cytoplasm, cytoplasm, cytoplasm
    E. cytoplasm,, mitochondria, microchondria
    C. cytoplasm, mitochondria, cytoplasm
    (this multiple choice question has been scrambled)
  35. What kind of membrane protein penetrates into the hydrophobic part of the lipid bilayer?
    A. integral protein
    B. peripheral proteins
    C. phosphatidylchloline
    D. galactocerebroside
    E. lipid-anchored protein
    A. integral protein
    (this multiple choice question has been scrambled)
  36. which of the following cell processes depend on the movement of membrane components and would probably not be possible if membranes were rigid, nonfluid structures?
    A. cell movement
    B. endocytosis
    C. all of these are correct
    D. cell division
    E. formation of intercellular junctions
    C. all of these are correct
    (this multiple choice question has been scrambled)
  37. The energy stored in ATP is converted to mechanical energy that moves organelles around within the cell. This is an example of ____.
    A. being exothermic
    B. energy conversion
    C. catherization
    D. being endothermic
    E. polymerization
    B. energy conversion
    (this multiple choice question has been scrambled)
  38. Entropy is associated with the ___ movement of particles of matter.
    A. random
    B. rapid
    C. slow
    d. None of the above.
    A. random
    (this multiple choice question has been scrambled)
  39. Which of the following is NOT a function of membranes?
    A. scaffold for biochemical activities
    B. transporting solutes
    C. energy transduction
    D. signal transition
    E. signal transduction
    D. signal transition
    (this multiple choice question has been scrambled)
  40. What are the building blocks of a phosphoglyceride, specifically phoshatidic acid?
    A. glycerol + 1 phosphate group + 2 fatty aids
    B. glycerol + 1 phosphate group
    C. glycerl + 3 fatty acids
    D. glycerol + 2 phosphate groups + 1 fatty acid
    E. glycerol +1 phosphate group + 3 fatty acids
    A. glycerol + 1 phosphate group + 2 fatty acids
    (this multiple choice question has been scrambled)
  41. If ATP is present in relatively high amounts, what is likely to happen to the rate of glycolytic activity in that cell?
    A. the glycolytic activity will probably slow down.
    B. the glycolytic activity will probably speed up.
    C. the glycolytic activity will probably remain the same.
    d. Any of the above are possibilities.
    A. the glycolytic activity will probably slow down.
    (this multiple choice question has been scrambled)
  42. The effect of a competitive inhibitor can be reversed by ___.
    A. increasing substrate concentration
    B. heating the reaction mixture
    C. changing the pH
    D. massaging the enzyme
    E. increasing inhibitor concentration
    A. increasing substrate concentration
    (this multiple choice question has been scrambled)

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