Bio Exam 2

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Author:
brittanyrluv
ID:
138566
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Bio Exam 2
Updated:
2012-02-28 21:39:05
Tags:
photosynthesis cellular respiration mitosis meiosis
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Description:
Photosynthesis, cellular respiration, mitosis, meiosis
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  1. Photosynthesis is an example of:
    A.An exergonic reaction
    B.Both A and B
    C.An endergonic reaction
    D.None of the above
    C.An endergonic reaction
    (this multiple choice question has been scrambled)
  2. What is the main product of the electron transport chain?
    A.In chloroplasts is O2
    B.ATP
    C.Both A and B are correct
    D.In mitochondria is CO2
    B. ATP
    (this multiple choice question has been scrambled)
  3. What is the final event in aerobic respiration?
    A.CO2 is released
    B.H2O gets broken down
    C.O2 gets reduced
    D.O2 gets oxidized
    C. O2 gets reduced
    (this multiple choice question has been scrambled)
  4. How is cellular respiration related to breathing?
    When we breathe we inhale the input of respiration (O2) and exhale the outputs of respiration (CO2 and H2O).
  5. Which below is FALSE?
    A.Asexual reproduction is used primarily by prokaryotes
    B.Sexual reproduction requires a lot of energy compared to asexual reproduction
    C.Asexual reproduction is relatively new
    D.Sexual reproduction generates diversity
    C.Asexual reproduction is relatively new
    (this multiple choice question has been scrambled)
  6. How are the members of a homologous pair of chromosomes similar and different?
    They carry the same genes, in the same sequence, but may have different alleles of those genes.
  7. Why is photosynthesis important for the direction taken in the evolution of life on Earth?
    A.It allowed life to evolve
    B.It allowed organisms to live inside of the water
    C.It allowed organisms to become more complex
    D.It allowed prokaryotic cells to evolve
    C.It allowed organisms to become more complex
    (this multiple choice question has been scrambled)
  8. Why is it not correct to describe photosynthesis as “a process in which water and carbon dioxide combine to form glucose”?
    Water and carbon dioxide do not directly combine in photosynthesis. Water is an input of the Light Reactions whereas CO2 is an input of the Carbon Reactions.
  9. How is oxygen gas produced during photosynthesis?
    A.By breaking down C6 H12 O6
    B.By breaking down H2O
    C.By breaking down ATP
    D.By breaking down CO2
    B.By breaking down H2O
    (this multiple choice question has been scrambled)
  10. Photons are…
    A.Packets of energy that travel in waves
    B.Electrons present in solar radiation
    C.Positively charged particles in solar radiation
    D.Positively charged particles in an atom
    A.Packets of energy that travel in waves
    (this multiple choice question has been scrambled)
  11. Put the following wavelengths of light in order from highest to lowest energy:
    •Blue
    •Green
    •Infrared
    •Orange
    •Red
    •Ultraviolet
    •Violet
    •Yellow
    Ultraviolet-violet-blue-green-yellow-orange-red-infrared
  12. Which is the most abundant pigment present in plants?
    A.Chloroplast
    B.Carotene
    C.Xanthophyll
    D.Chlorophyll b
    E.Chlorophyll a
    E.Chlorophyll a
    (this multiple choice question has been scrambled)
  13. Why are there yellow, orange and red leaves in fall in temperate areas?
    A.The plants start producing larger amounts of non-chlorophyll pigments
    B.Chlorophyll disappears from the leaves then
    C.Chlorophyll degrades into pigments other than green
    D.Chlorophyll degrades into carotenes
    B.Chlorophyll disappears from the leaves then
    (this multiple choice question has been scrambled)
  14. What is the best definition of NADPH?
    A.An electron carrier molecule produced in the stroma of the chloroplast
    B.An electron acceptor molecule present in the inner membrane of the mitochondrion
    C.An electron carrier molecule produced in the matrix of the mitochondrion
    D.An electron acceptor molecule present in the thylakoid membrane
    A.An electron carrier molecule produced in the stroma of the chloroplast
    (this multiple choice question has been scrambled)
  15. The carbon reactions of photosynthesis used to be called dark reactions. Why the name change?
    A.As a carbohydrate is the main input of the reaction, the term “carbon reaction” is more appropriate
    B.Even though light is not an input, the carbon reactions need to occur simultaneously with the light reactions
    C.Light is one of the inputs of the carbon reactions
    D.As carbon dioxide is an output of the reaction, the term “carbon reaction” is more appropriate
    B.Even though light is not an input, the carbon reactions need to occur simultaneously with the light reactions
    (this multiple choice question has been scrambled)
  16. During photosynthesis…
    A.Carbon dioxide is oxidized into glucose
    B.Carbon dioxide is reduced into glucose
    C.Glucose is oxidized into carbon dioxide
    D.Glucose is reduced into carbon dioxide
    B.Carbon dioxide is reduced into glucose
    (this multiple choice question has been scrambled)
  17. During aerobic respiration…
    A.Carbon dioxide is reduced into glucose
    B.Glucose is oxidized into carbon dioxide
    C.Carbon dioxide is oxidized into glucose
    D.Glucose is reduced into carbon dioxide
    B.Glucose is oxidized into carbon dioxide
    (this multiple choice question has been scrambled)
  18. Photosystems 1 and 2 are connected by:
    A.An electron transport chain
    B.The Calvin cycle
    C.The carbon reactions
    D.The Krebs cycle
    A.An electron transport chain
    (this multiple choice question has been scrambled)
  19. PGAL is:
    A.An electron transport molecule in fermentation
    B.A carbohydrate produced in the Calvin cycle
    C.An electron transport molecule in photosynthesis
    D.A sugar present in the stroma that combines with CO2 as it enters the Calvin cycle
    B.A carbohydrate produced in the Calvin cycle
    (this multiple choice question has been scrambled)
  20. True or False: CO2 can be either absorbed by the leaves or by the roots of a plant.
    • False, CO2 is absorbed only by the leaves using the
    • stomata.
  21. True or False: Glucose can be either absorbed by the leaves or by the roots of a plant.
    • False, Plants do not absorb glucose; they produce
    • it.
  22. What are the 3 pathways to obtain energy from food used by organisms?
    • Aerobic respiration, anaerobic respiration and
    • fermentation
  23. During glycolysis, a glucose molecule is:
    A.Broken down to form 2 molecules of pyruvate
    B.Put together to form 2 molecules of pyruvate
    C.Put together to form 1 molecule of pyruvate
    D.Broken down and the carbon atoms liberated as CO2
    E.Broken down into 3 molecules of pyruvate
    A.Broken down to form 2 molecules of pyruvate
    (this multiple choice question has been scrambled)
  24. The electrons that are transferred during cellular respiration are carried in the molecules:
    A.NADH and FADH2
    B.NADP and FADH2
    C.NADH2 and Glucose
    D.NADH and NADP
    A.NADH and FADH2
    (this multiple choice question has been scrambled)
  25. The electron transport chain of respiration is located in the:
    A.Mitochondrion
    B.Nucleus
    C.Cytoplasm
    D.Lysosome
    A.Mitochondrion
    (this multiple choice question has been scrambled)
  26. The area enclosed by the highly folded inner mitochondrial membrane is the:
    A.Matrix
    B.Cytoplasm
    C.Stroma
    D.Outer membrane
    A.Matrix
    (this multiple choice question has been scrambled)
  27. In Glycolysis the net number of ATP produced is:
    A.4
    B.1
    C.34
    D.2
    D.2
    (this multiple choice question has been scrambled)
  28. The sole source of ATP production in cells using fermentation only is:
    A.Glycolysis
    B.Kreb’s cycle
    C.Calvin cycle
    D.Electron transport chain
    A.Glycolysis
    (this multiple choice question has been scrambled)
  29. The most ancient of the energy pathways is probably:
    A.Calvin cycle
    B.Aerobic respiration
    C.Glycolysis
    D.Photosynthesis
    C.Glycolysis
    (this multiple choice question has been scrambled)
  30. If you put a plant in a chamber and place it in the dark, the concentrations ______:
    A.of O2 will fall and CO2 will rise
    B.of both O2 and CO2 will rise
    C.of both O2 and CO2 will fall
    D.of O2 will rise and CO2 will fall
    A.of O2 will fall and CO2 will rise
    (this multiple choice question has been scrambled)
  31. The molecule that controls the synthesis of proteins and copies itself for the next generation of cells is:
    A.RNA
    B.FAD
    C.DNA
    D.NADH
    C.DNA
    (this multiple choice question has been scrambled)
  32. Eukaryotic chromosomes become microscopically visible in cell division because:
    A.They become less tightly wound
    B.They become more tightly wound
    C.They increase in length
    D.They become more tightly wound and they increase in length
    B.They become more tightly wound
    (this multiple choice question has been scrambled)
  33. A cell with two full sets of chromosomes would be termed a_____ cell.
    A.Sister
    B.Haploid
    C.Somatic
    D.Diploid
    D.Diploid
    (this multiple choice question has been scrambled)
  34. The pair of unmatched chromosomes in humans:
    A.Are a pair of autosomes in males
    B.Are a pair of autosomes in females
    C.Are the sex chromosomes in males
    D.Are the sex chromosomes in females
    C.Are the sex chromosomes in males
    (this multiple choice question has been scrambled)
  35. The portion of the cytoskeleton that enables the chromosomes to be separated equally into two sets is the:
    A.Centromere
    B.Flagellum
    C.Mitotic spindle
    D.Golgy body
    C.Mitotic spindle
    (this multiple choice question has been scrambled)
  36. The phase of mitosis in which the nuclear envelope breaks into small pieces is:
    A.Metaphase
    B.Anaphase
    C.Prophase
    D.Prometaphase
    D.Prometaphase
    (this multiple choice question has been scrambled)
  37. A zygote is:
    A.A product of meiosis
    B.A diploid cell
    C.A gamete
    D.A haploid cell
    B.A diploid cell
    (this multiple choice question has been scrambled)
  38. Meiotic cell division replicates a cell’s DNA ______ and then divides ______.
    A.Once, twice
    B.Once, once
    C.Twice, twice
    D.Twice, once
    A.Once, twice
    (this multiple choice question has been scrambled)
  39. Chromosomes that look alike and carry the same sequence of genes for the same traits are:
    A.The X and Y chromosomes
    B.Found in females only
    C.All the autosomes
    D.Homologous chromosomes
    D.Homologous chromosomes
    (this multiple choice question has been scrambled)
  40. In meiosis, paired homologs align down the center of the cell during:
    A.Prophase 1
    B.Prophase 2
    C.Metaphase 1
    D.Metaphase 2
    C.Metaphase 1
    (this multiple choice question has been scrambled)
  41. G1
    Cell grows
  42. S
    DNA replication
  43. G2
    prepares to divide
  44. Prophase Mitosis
    • –DNA coils tightly
    • –2 centrosomes migrate to opposite poles
    • –Spindle fibers form
    • –Nucleolus disappears
  45. Prometaphase Mitosis
    • –Spindles attach to chromosomes
    • –Nuclearenvelope disappears
  46. Metaphase Mitosis
    Mitotic spindle aligns chromosomes on equator
  47. Anaphase Mitosis
    • Centromeres split
    • Sister chromatids pulled apart
  48. Telophase Mitosis
    • –Spindle disassembles
    • –Chromosomes unwind
    • –Nuclear envelope and nucleolus reappear
  49. Prophase 1 Meiosis 1
    • Replicated chromosomes condense
    • Homologous chromosomes line up next to one another
    • Crossing over occurs
  50. Metaphase 1 Meiosis 1
    Paired homologs align at the cell’s equator
  51. Anaphase 1 Meiosis 1
    • Homologous chromosomes separate
    • Sister chromatids remain joined
  52. Telophase 1 Meiosis 1
    • Nuclear envelopes form around chromosomes with may temporarily decondense
    • spindles disappear
  53. Prophase 2 Meiosis 2
    • Spindles form
    • Nuclear envelopes break up
  54. Metaphase 2 Meiosis 2
    Chromosomes align along equator of cell
  55. Anaphase 2 Meiosis 2
    Centromeres split as sister chromatids separate to opposite poles of cell
  56. Telophase 2 Meiosis 2
    • Nuclear envelopes assemble around daughter nuclei
    • Chromosomes decondense
    • Spindles disappear
  57. Polyploidy
    • Diploid human gametes may be formed due to problems in formation of the spindle fibers
    • Fertilization would produce a triploid zygote, not viable; zygote does not develop
  58. Nondisjunction
    • Chromosomes fail to separate at either the first or the second meiotic division
    • results in Extra or missing chromosomes (one extra chromosomes: trisomy)
    • Most embryos with incorrect chromosome numbers cease developing before birth (spontaneous abortion)
  59. Trisomy 21
    Down Syndrome
  60. Trisomy
    One extra chromosome

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